On-board carbon dioxide capture system, method and vehicle

Abstract

The present application provides an on-vehicle carbon dioxide capture system, method, and vehicle. The system includes a first multi-way valve, a second multi-way valve, and multiple adsorbers / desorbers. The inlet of the first multi-way valve is connected to the exhaust outlet of the engine, one of the multiple outlets of the first multi-way valve is connected to the inlet of the second multi-way valve, a preset outlet among the multiple outlets of the second multi-way valve is connected to the atmospheric environment, and all outlets of the second multi-way valve other than the preset outlet are connected to the adsorbers / desorbers, and the adsorbers / desorbers are connected to the outlets of the second multi-way valve in a one-to-one correspondence. The adsorbers / desorbers are used to adsorb or desorb carbon dioxide from the engine exhaust. This solves the problem of low efficiency in the current method of directly capturing carbon dioxide from the air.

Description

Technical Field

[0001] The present application relates to carbon dioxide capture, and more particularly, to an on-board carbon dioxide capture system, method, and vehicle. Background Art

[0002] Internal combustion engines (ICEs) generate large amounts of carbon dioxide during operation, making the transportation industry a major contributor to the greenhouse effect. Currently, carbon reduction in ICEs is primarily achieved through improving combustion thermal efficiency and fuel cleanliness (e.g., using zero-carbon or low-carbon fuels, or recycling carbon in the fuel from CO2). However, because ICEs are often integrated into vehicles, their mobility and vibration make direct CO2 capture at the engine exhaust rare.

[0003] CCUS (Carbon Capture Utilization and Storage) refers to various sustainable and proper treatments of carbon dioxide, including capture, utilization, and storage, and these three are related to each other. Carbon capture can be simply divided into direct capture from the air (DAC) and capture from sources of higher concentrations of carbon dioxide emissions (such as thermal power plants, coal plants, iron and steel plants, etc.). There are many ways to utilize and store carbon dioxide, and only some examples are shown here, including chemical synthesis of other products, biological fermentation, oil extraction (pressing carbon dioxide into oil fields with high pressure can both store carbon dioxide and increase oil production), civil construction (using carbonates generated by carbon dioxide to replace silicates in concrete), etc.

[0004] Currently, there is a proposal to provide an on-board carbon dioxide capture device that uses the large amount of wind generated by the car during driving to automatically draw air into the carbon dioxide capture device through the air intake, and uses the carbon dioxide capture agent filled inside to absorb the carbon dioxide in the air. In fact, due to the very low concentration of carbon dioxide in the air (only 0.03% to 0.04%), this direct air capture (DAC) method can capture a very limited amount of carbon dioxide and is not an efficient carbon capture technology route. This technology fails to effectively utilize the high concentration of carbon dioxide in the exhaust of the vehicle engine itself (in the case of an internal combustion engine rather than a battery). Summary of the Invention

[0005] The main purpose of the present application is to provide an on-vehicle carbon dioxide capture system, method and vehicle to at least solve the problem of low efficiency of the current method of directly capturing carbon dioxide from the air.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a vehicle-mounted carbon dioxide capture system is provided, comprising: a first multi-way valve, a second multi-way valve, and a plurality of adsorbents / desorbers, wherein the inlet of the first multi-way valve is used to connect with the exhaust outlet of the engine, one of the multiple outlets of the first multi-way valve is connected to the inlet of the second multi-way valve, a preset outlet among the multiple outlets of the second multi-way valve is connected to the atmospheric environment, and all the outlets of the second multi-way valve except the preset outlet are connected to the adsorbent / desorber, and the adsorbent / desorber is connected to the outlet of the second multi-way valve in a one-to-one correspondence, wherein the adsorbent / desorber is used to adsorb or desorb carbon dioxide in the engine exhaust.

[0007] Optionally, the vehicle-mounted carbon dioxide capture system further includes a plurality of pressure sensors, which are respectively installed at pressure detection positions of the plurality of adsorbers / desorbers, and the pressure sensors correspond one-to-one to the adsorbers / desorbers.

[0008] Optionally, the on-vehicle carbon dioxide capture system further includes: a water tank, a water tank heating jacket arranged on the periphery of the water tank, a dry gas tank, and a dry gas tank heating jacket arranged on the periphery of the dry gas tank, wherein, among the multiple outlets of the first multi-way valve, except for one of the outlets connected to the inlet of the second multi-way valve, one outlet is connected to the water tank heating jacket, and another outlet is connected to the dry gas tank heating jacket.

[0009] Optionally, the on-board carbon dioxide capture system further includes a carbon dioxide storage tank and a water pump, wherein the inlet of the carbon dioxide storage tank is connected to the outlet of the adsorbent / desorber, the inlet of the water pump is connected to the bottom of the carbon dioxide storage tank, and the outlet of the water pump is connected to the water tank.

[0010] Optionally, the on-board carbon dioxide capture system further includes a water tank control valve, the inlet of the water tank control valve is connected to the water vapor outlet of the water tank, and the multiple outlets of the water tank control valve are respectively connected to the multiple adsorbers / desorbers, and the outlets of the water tank control valve correspond one-to-one to the adsorbers / desorbers.

[0011] Optionally, the on-board carbon dioxide capture system further includes a dry gas tank control valve, the inlet of the dry gas tank control valve is connected to the dry air outlet of the dry gas tank, and multiple outlets of the dry gas tank control valve are respectively connected to multiple adsorbers / desorbers, and the outlets of the dry gas tank control valve correspond one-to-one to the adsorbers / desorbers.

[0012] Optionally, the vehicle-mounted carbon dioxide capture system further includes a tank pressure sensor, which is installed at a pressure sensing position of the carbon dioxide tank.

[0013] Optionally, the on-board carbon dioxide capture system further includes a carbon dioxide unloading control valve, the inlet of the carbon dioxide unloading control valve is connected to the carbon dioxide outlet of the carbon dioxide storage tank, and the outlet of the carbon dioxide unloading control valve is directly connected to the atmospheric environment or connected to the atmospheric environment through a post-processing system.

[0014] Optionally, the vehicle-mounted carbon dioxide capture system further includes: an after-treatment system, wherein the after-treatment system is connected between the exhaust gas outlet of the engine and the inlet of the first multi-way valve.

[0015] According to another aspect of the present application, a method for achieving carbon dioxide capture by the on-vehicle carbon dioxide capture system is provided, comprising: after starting the engine, controlling the preset outlet of the second multi-way valve to be disconnected from the inlet of the second multi-way valve, and controlling the outlets of the second multi-way valve other than the preset outlet to be connected to the inlet of the second multi-way valve, controlling the inlet of the first multi-way valve to be connected to the outlet connected to the inlet of the second multi-way valve, and controlling the inlet of the first multi-way valve to be disconnected from the outlet not connected to the inlet of the second multi-way valve, so as to use an adsorber / desorber to adsorb or desorb carbon dioxide in the exhaust gas discharged from the exhaust outlet of the engine.

[0016] Optionally, the on-vehicle carbon dioxide capture system further includes multiple pressure sensors, a carbon dioxide storage tank, and a storage tank pressure sensor. The inlet of the carbon dioxide storage tank is connected to the outlet of the adsorbent / desorber. The multiple pressure sensors respectively detect the pressures of the multiple adsorbents / desorbers, and the storage tank pressure sensor detects the pressure of the carbon dioxide storage tank. Controlling the outlets of the second multi-way valve other than the preset outlet to be connected to the inlet of the second multi-way valve includes: determining whether the current pressure of the carbon dioxide storage tank is less than a first preset pressure; if the current pressure of the carbon dioxide storage tank is less than the first preset pressure, continuing to determine whether the current pressure of each adsorbent / desorber is greater than a second preset pressure; if the current pressure of any adsorbent / desorber is less than the second preset pressure, controlling the inlet of the second multi-way valve to be connected to its target outlet, wherein the target outlet is the outlet connected to the inlet of the adsorbent / desorber whose current pressure is less than the second preset pressure.

[0017] Optionally, the on-vehicle carbon dioxide capture system further includes a water tank, a water tank heating jacket arranged around the water tank, a dry gas tank, and a dry gas tank heating jacket arranged around the dry gas tank, wherein, among the multiple outlets of the first multi-way valve, except for one of the outlets connected to the inlet of the second multi-way valve, is connected to the water tank heating jacket, and another outlet is connected to the dry gas tank heating jacket. After determining whether the current pressure of the carbon dioxide storage tank is less than a first preset pressure, the method further includes: when the current pressure of the carbon dioxide storage tank is greater than or equal to the first preset pressure, issuing a prompt message, controlling the inlet of the second multi-way valve to be connected only to the atmospheric environment, and controlling the first multi-way valve to stop supplying gas to the water tank heating jacket and the dry gas tank heating jacket, wherein the prompt message is used to prompt that the carbon dioxide storage tank is full and needs to be unloaded.

[0018] Optionally, the on-vehicle carbon dioxide capture system further includes a water tank, a water tank heating jacket arranged on the periphery of the water tank, a dry gas tank, a dry gas tank heating jacket arranged on the periphery of the dry gas tank, a water pump and a water tank control valve. Among the multiple outlets of the first multi-way valve, except for one outlet connected to the inlet of the second multi-way valve, one outlet is connected to the water tank heating jacket, and another outlet is connected to the dry gas tank heating jacket. The inlet of the water pump is connected to the bottom of the carbon dioxide storage tank, and the outlet of the water pump is connected to the water tank. The water tank control valve is connected between the water vapor outlet of the water tank and the adsorbent / desorber. After determining whether the current pressure of each of the adsorbent / desorbers is greater than the second preset pressure, the The method further includes: controlling the second multi-way valve to stop supplying gas to the adsorbent / desorber whose current pressure is greater than or equal to the second preset pressure, controlling the first multi-way valve to supply gas to the water tank heating jacket, starting the water pump, and controlling the water tank control valve to pass water vapor to the adsorbent / desorber whose current pressure is greater than the second preset pressure; after a first preset time period of steam purge, controlling the first multi-way valve to stop supplying gas to the water tank heating jacket, and starting to supply gas to the dry gas tank heating jacket after stopping supplying gas to the water tank heating jacket; after a second preset time period, turning off the water pump and controlling the water tank control valve to stop passing water vapor to the corresponding adsorbent / desorber.

[0019] Optionally, the on-vehicle carbon dioxide capture system further includes a dry gas tank control valve, the inlet of the dry gas tank control valve being connected to the dry air outlet of the dry gas tank, and the multiple outlets of the dry gas tank control valve being connected to the multiple adsorbers / desorbers, respectively. After turning off the water pump and controlling the water tank control valve to stop the flow of water vapor to the corresponding adsorber / desorber, the method further includes: controlling the dry gas tank control valve to flow dry hot air to the corresponding adsorber / desorber; after a third preset time period, re-obtaining the current pressure of the corresponding adsorber / desorber, and when the current pressure is less than the third preset pressure, controlling the second multi-way valve to flow air to the adsorber / desorber.

[0020] According to yet another aspect of the present application, a vehicle is provided, comprising any one of the on-board carbon dioxide capture systems and an engine connected to the on-board carbon dioxide capture system.

[0021] Using the technical solution of this application, an on-vehicle carbon dioxide capture system includes: a first multi-way valve, a second multi-way valve, and multiple adsorbers / desorbers, wherein the inlet of the first multi-way valve is used to communicate with the exhaust outlet of the engine, one of the multiple outlets of the first multi-way valve is connected to the inlet of the second multi-way valve, a preset outlet among the multiple outlets of the second multi-way valve is connected to the atmospheric environment, and all of the multiple outlets of the second multi-way valve except the preset outlet are connected to the adsorbers / desorbers, and the adsorbers / desorbers are connected to the outlets of the second multi-way valve in a one-to-one correspondence. The adsorbers / desorbers are used to adsorb or desorb carbon dioxide from the engine exhaust. This solves the problem of low efficiency of the current method of directly capturing carbon dioxide from the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0023] Figure 1 shows a structural block diagram of a vehicle-mounted carbon dioxide capture system provided in an embodiment of the present application;

[0024] Figure 2 A flow chart of a method for capturing carbon dioxide using a vehicle-mounted carbon dioxide capture system according to an embodiment of the present application is shown;

[0025] Figure 3 A flow chart of a method for capturing carbon dioxide using a specific vehicle-mounted carbon dioxide capture system provided in an embodiment of the present application is shown.

[0026] The above drawings include the following reference numerals:

[0027] 1. Engine; 2. Aftertreatment system; 3. First multi-way valve; 4. Second multi-way valve; 5. Adsorber / desorber; 6. Adsorber / desorber pressure sensor; 7. CO2 storage tank; 8. Storage tank pressure sensor; 9. CO2 unloading control valve; 10. Water pump; 11. Water tank; 12. Water tank control valve; 13. Water tank heating jacket; 14. Dry gas tank; 15. Dry gas tank control valve; 16. Dry gas tank heating jacket. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] As introduced in the background technology, the existing technology uses a large amount of wind field generated during the driving of the car to automatically introduce air into the carbon dioxide capture device through the air intake, and uses the internal filled carbon dioxide capture agent to adsorb carbon dioxide in the air. It fails to effectively utilize the high carbon dioxide concentration in the exhaust of the car engine (in the case of an internal combustion engine rather than a battery). In order to solve the problem of low efficiency of the current method of directly capturing carbon dioxide from the air, the embodiments of the present application provide a vehicle-mounted carbon dioxide capture system, method and vehicle.

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] In this embodiment, a vehicle-mounted carbon dioxide capture system is provided. Figure 1 It is a structural diagram of a vehicle-mounted carbon dioxide capture system according to an embodiment of the present application.

[0034] like Figure 1 As shown, the system includes: a first multi-way valve 3 , a second multi-way valve 4 , and a plurality of adsorbers / desorbers 5 .

[0035] Among them, the inlet of the first multi-way valve 3 is used to communicate with the exhaust outlet of the engine 1, one of the multiple outlets of the first multi-way valve 3 is connected to the inlet of the second multi-way valve 4, the preset outlet among the multiple outlets of the second multi-way valve 4 is connected to the atmospheric environment, and the multiple outlets of the second multi-way valve 4 except the preset outlet are all connected to the adsorbent / desorber 5, and the adsorbent / desorber 5 is connected to the outlet of the second multi-way valve 4 in a one-to-one correspondence, wherein the adsorbent / desorber 5 is used to adsorb or desorb carbon dioxide in the engine exhaust.

[0036] Specifically, the exhaust outlet of engine 1 emits carbon dioxide. Taking advantage of the high concentration of carbon dioxide in the engine exhaust, the system captures carbon dioxide at a higher rate and in greater quantities than directly capturing it from the air. The system also utilizes the kinetic energy and waste heat of the exhaust to reduce system energy consumption. A first multi-way valve 3 controls whether the engine exhaust heats the dry gas tank 14 and water tank 11. A second multi-way valve 4 controls whether the engine exhaust flows into each adsorber / desorber 5. Adsorbers / desorbers 5 adsorb carbon dioxide and desorb it when a certain amount is adsorbed. Multiple adsorbers / desorbers 5 operate alternately, performing adsorption and desorption operations, enabling continuous carbon capture.

[0037] It can be seen that when the engine is working, the exhaust gas generated enters the first multi-way valve 3 through the inlet. At this time, the first multi-way valve 3 guides the exhaust gas to the second multi-way valve 4 according to the control of the system. After the second multi-way valve 4 receives the exhaust gas from the first multi-way valve 3, it distributes the exhaust gas to different outlets according to the control logic. Part of the exhaust gas is discharged into the atmosphere through the preset outlet, and the remaining exhaust gas continues to flow to one or more adsorbers / desorbers 5. When the exhaust gas enters the adsorber / desorber 5, the carbon capture material will adsorb the carbon dioxide in the exhaust gas. This process can be achieved through physical or chemical adsorption to ensure the effective capture of carbon dioxide. When the adsorber / desorber 5 reaches a certain degree of saturation, it can be desorbed by heating or reducing the pressure, and the captured carbon dioxide can be released to an independent storage tank or recovery system.

[0038] In summary, the on-board CO2 capture system is designed to effectively capture engine-generated CO2, thereby reducing its negative environmental impact. The system's core components include a first multi-way valve 3, a second multi-way valve 4, and multiple adsorbers / desorbers 5. The structural design is designed to optimize the CO2 capture and release process.

[0039] As a possible implementation, the vehicle-mounted carbon dioxide capture system further includes a plurality of pressure sensors, which are respectively installed at the pressure detection positions of the plurality of adsorbers / desorbers 5 , and the pressure sensors correspond one to one with the adsorbers / desorbers 5 .

[0040] Specifically, the adsorber / desorber pressure sensor 6 is used to monitor the carbon dioxide partial pressure in the adsorber / desorber 5, determine whether regeneration is needed, and ensure the smooth progress of the capture and desorption process. Each adsorber / desorber 5 is equipped with a pressure sensor to ensure accurate pressure data collection.

[0041] As a possible implementation, the on-vehicle carbon dioxide capture system further includes: a water tank 11, a water tank heating jacket 13 arranged on the periphery of the water tank 11, a dry gas tank 14, and a dry gas tank heating jacket 16 arranged on the periphery of the dry gas tank 14, wherein, among the multiple outlets of the first multi-way valve 3, except for one of the outlets connected to the inlet of the second multi-way valve 4, one outlet is connected to the water tank heating jacket 13, and another outlet is connected to the dry gas tank heating jacket 16.

[0042] Specifically, the water tank 11 is used to provide the water vapor required for steam purge regeneration; the water tank heating jacket 13 is used to utilize the exhaust waste heat when the engine exhaust flows through the water tank 11 to vaporize part of the liquid water into water vapor, and this water vapor is subsequently used for steam purge regeneration of the adsorbent / desorber 5; the dry gas tank 14 is used to provide the dry air required for drying treatment after steam purge regeneration; the dry gas tank heating jacket 16 is used to utilize the exhaust waste heat when the engine exhaust flows through the dry gas tank 14 to heat the air in the tank to make it drier, and the dry air is used for secondary drying treatment after steam purge regeneration to ensure that the gas entering the adsorbent / desorber 5 is dry and clean.

[0043] It can be seen that through the design of integrating the water tank 11, the dry gas tank 14 and its heating jacket, the vehicle-mounted carbon dioxide capture system has a stronger processing capacity, can effectively reduce the moisture in the exhaust gas, and improve the capture efficiency.

[0044] As a possible implementation method, the on-board carbon dioxide capture system also includes a carbon dioxide storage tank 7 and a water pump 10. The inlet of the carbon dioxide storage tank 7 is connected to the outlet of the adsorbent / desorber 5. The inlet of the water pump 10 is connected to the bottom of the carbon dioxide storage tank 7, and the outlet of the water pump 10 is connected to the water tank 11.

[0045] Specifically, the CO2 storage tank 7 stores desorbed CO2, while a water pump 10 returns the water at the bottom of the CO2 storage tank 7 to a water tank 11 for recycling. When the adsorber / desorber 5 reaches saturation, steam generated in the water tank 11 is used to purge the captured CO2. The released CO2 enters the CO2 storage tank 7 for storage, while the water at the bottom of the CO2 storage tank 7 is returned to the water tank 11, ensuring water recycling. The water pump 10 can be powered by the vehicle's electric power or directly by engine exhaust.

[0046] Thus, by integrating the CO2 storage tank 7 and water pump 10, the on-board CO2 capture system achieves effective CO2 storage and water recycling. The added functionality of the water pump 10 not only enhances the system's efficiency and reliability, but also ensures operational flexibility and environmental friendliness.

[0047] As a possible implementation method, the on-board carbon dioxide capture system also includes a water tank control valve 12, the inlet of the water tank control valve 12 is connected to the water vapor outlet of the water tank 11, and multiple outlets of the water tank control valve 12 are respectively connected to multiple adsorbers / desorbers 5, and the outlets of the water tank control valve 12 correspond one-to-one to the adsorbers / desorbers 5.

[0048] Specifically, the water tank control valve 12 is used to control which adsorber / desorber 5 the water vapor flows into. This allows precise control of the water vapor flow to a specific adsorber / desorber 5, optimizing the steam purge process. By utilizing the competitive adsorption characteristics of carbon dioxide and water, steam purge allows for rapid desorption and regeneration of the adsorbent material.

[0049] Thus, the integrated water tank control valve 12 enables the on-board CO2 capture system to precisely control and distribute water vapor. This design not only optimizes the steam purge process but also enhances the overall efficiency and flexibility of the system.

[0050] As a possible implementation method, the on-board carbon dioxide capture system also includes a dry gas tank control valve 15, the inlet of the dry gas tank control valve 15 is connected to the dry air outlet of the dry gas tank 14, and multiple outlets of the dry gas tank control valve 15 are respectively connected to multiple adsorbers / desorbers 5, and the outlets of the dry gas tank control valve 15 correspond one-to-one to the adsorbers / desorbers 5.

[0051] Specifically, the dry gas tank control valve 15 is used to control which adsorbent / desorber 5 the dry air flows into. The dry gas tank control valve 15 can accurately control the dry air flow to a specific adsorbent / desorber 5 to optimize the carbon dioxide capture and desorption process.

[0052] Thus, the on-board CO2 capture system achieves precise control and distribution of dry air through the dry gas tank control valve 15. This design not only optimizes the CO2 capture and desorption process, but also enhances the overall efficiency and flexibility of the system.

[0053] As a possible implementation, the vehicle-mounted carbon dioxide capture system further includes a tank pressure sensor 8 , which is installed at a pressure sensing position of the carbon dioxide storage tank 7 .

[0054] Specifically, the tank pressure sensor 8 is used to monitor the pressure of the carbon dioxide storage tank 7 and determine whether unloading is required. The newly added tank pressure sensor 8 can monitor the pressure of the carbon dioxide storage tank 7 in real time to ensure the safety and reliability of the system operation.

[0055] As a possible implementation method, the on-board carbon dioxide capture system also includes a carbon dioxide unloading control valve 9, the inlet of the carbon dioxide unloading control valve 9 is connected to the carbon dioxide outlet of the carbon dioxide storage tank 7, and the outlet of the carbon dioxide unloading control valve 9 is directly connected to the atmospheric environment or connected to the atmospheric environment through the post-processing system 2.

[0056] Specifically, the carbon dioxide unloading control valve 9 is used to unload carbon dioxide when it can be unloaded. The newly added carbon dioxide unloading control valve 9 supports the system to safely unload the stored carbon dioxide into the atmosphere at an appropriate time, or to further process it through the post-processing system 2 to ensure environmental safety.

[0057] As a possible implementation, the vehicle-mounted carbon dioxide capture system further includes: an after-treatment system 2 , which is connected between the exhaust gas outlet of the engine 1 and the inlet of the first multi-way valve 3 .

[0058] Specifically, the aftertreatment system is used to purify various engine exhaust pollutants, generally excluding carbon dioxide. If the engine's original emissions are low or emissions requirements are less stringent, it may not be used. The newly added aftertreatment system is connected between the engine's exhaust outlet and the inlet of the first multi-way valve, focusing on purifying other exhaust pollutants.

[0059] It can be seen that through the integration of the post-treatment system, the on-board carbon dioxide capture system can not only capture and treat carbon dioxide, but also comprehensively purify other pollutants in the exhaust gas, thereby improving the overall environmental protection effect.

[0060] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the structural block diagram of a specific vehicle-mounted carbon dioxide capture system of the present application will be described in detail below in combination with specific embodiments.

[0061] This embodiment relates to a specific vehicle-mounted carbon dioxide capture system such as Figure 1 shown, and Figure 1 The names and functions of the various parts are shown in Table 1.

[0062] Table 1 Names and functions of various parts of this embodiment

[0063]

[0064]

[0065] When the system is in operation, exhaust gas from engine 1 first flows through aftertreatment system 2 (in some cases, where the original engine pollutant levels are low or emission limits are relatively loose), and then flows to first multi-way valve 3. First multi-way valve 3 divides the gas path into three directions: continuing to flow into adsorber / desorber 5, flowing to water tank heating jacket 13, and flowing to dry gas tank heating jacket 16.

[0066] The gas path to the adsorber / desorber 5 is divided by a second multi-way valve 4 into branches directed to different adsorbers / desorbers 5 and a branch directly to the atmosphere. When the adsorber / desorber 5 in a particular branch is operational, engine exhaust is allowed to flow into that branch through the second multi-way valve 4 to adsorb some of the carbon dioxide in the exhaust. If the adsorber / desorber pressure sensor 6 detects that the carbon capture material in that branch is nearing saturation, the engine exhaust is disconnected and desorption regeneration of that branch is initiated.

[0067] During regeneration, water from the bottom of the CO2 storage tank 7 is pumped back to the water tank 11 via a water pump 10. This pump can be powered by the vehicle's electricity or directly by engine exhaust. The engine exhaust then flows through the water tank heating jacket 13, vaporizing some of the liquid water. The water then flows through the water tank control valve 12 into the adsorber / desorber 5 requiring desorption and regeneration. This hydrothermal process allows for rapid desorption of CO2. The desorbed CO2 then flows into the CO2 storage tank 7 for storage.

[0068] After CO2 desorption is complete, the water vapor must be cut off. The dry air in the dry gas tank 14 is heated using the dry gas tank heating jacket 16, and the capture material is again thermally purged through the dry gas tank control valve 15 to remove moisture. This prevents this moisture from interfering with the CO2 capture effect during subsequent adsorption and capture. Existing technologies such as desiccants can be used to maintain the dry atmosphere in the dry gas tank 14.

[0069] Finally, when the tank pressure sensor 8 detects that the CO2 storage tank 7 is full, all carbon capture branches should be disconnected, allowing the engine exhaust to pass directly to the atmosphere after passing through the aftertreatment system 2. This prevents pressure loss caused by the entire carbon capture system being inoperative. At the same time, the user should be reminded to unload the CO2 in the tank. When the user issues an unloading instruction, the CO2 unloading control valve 9 can be opened to discharge the CO2 in the tank, thereby restoring the CO2 storage tank 7 to a usable state.

[0070] In summary, the vehicle-mounted carbon dioxide capture system of this embodiment integrates multiple components, including control valves, sensors, storage tanks, post-treatment systems, etc., aiming to comprehensively capture, store and treat pollutants emitted by vehicles, especially in treating traditional pollutants and carbon dioxide.

[0071] This embodiment also provides a method for realizing carbon dioxide capture by a vehicle-mounted carbon dioxide capture system, such as Figure 2 As shown, the method includes:

[0072] Step S201: After starting the engine, the preset outlet of the second multi-way valve is controlled to be disconnected from the inlet of the second multi-way valve, and the outlets of the second multi-way valve other than the preset outlet are controlled to be connected to the inlet of the second multi-way valve, the inlet of the first multi-way valve is controlled to be connected to the outlet connected to the inlet of the second multi-way valve, and the inlet of the first multi-way valve is controlled to be disconnected from the outlet not connected to the inlet of the second multi-way valve, so as to use an adsorber / desorber to adsorb or desorb carbon dioxide in the exhaust gas discharged from the exhaust outlet of the engine.

[0073] The on-board CO2 capture system, through efficient valve control and adsorption / desorption processes, ensures precise capture and treatment of CO2 from engine exhaust. This design enhances the system's operational flexibility and CO2 treatment efficiency, providing reliable technical support for achieving cleaner emissions.

[0074] As a possible implementation, the on-vehicle carbon dioxide capture system further includes multiple pressure sensors, a carbon dioxide storage tank, and a storage tank pressure sensor. The inlet of the carbon dioxide storage tank is connected to the outlet of the adsorbent / desorber. The multiple pressure sensors respectively detect the pressures of the multiple adsorbents / desorbers, and the storage tank pressure sensor detects the pressure of the carbon dioxide storage tank. Controlling the outlets of the second multi-way valve other than the preset outlet to be connected to the inlet of the second multi-way valve includes: determining whether the current pressure of the carbon dioxide storage tank is less than a first preset pressure; if the current pressure of the carbon dioxide storage tank is less than the first preset pressure, continuing to determine whether the current pressure of each adsorbent / desorber is greater than a second preset pressure; if the current pressure of any adsorbent / desorber is less than the second preset pressure, controlling the inlet of the second multi-way valve to be connected to its target outlet, the target outlet being the outlet connected to the inlet of the adsorbent / desorber whose current pressure is less than the second preset pressure.

[0075] Specifically, the setting of the first preset pressure is related to factors such as the material and pressure resistance limit of the carbon dioxide storage tank, and the setting of the second preset pressure is related to the characteristics of the selected capture material. It is not a permanently fixed value. For example, the reference value for the case using MEA (ethanolamine) adsorption material is: the first preset pressure is 1000kPa, and the second preset pressure is 90kPa.

[0076] It can be seen from this that the current pressure of the carbon dioxide storage tank is detected and judged. If the current pressure is less than the first preset pressure, it means that the storage tank can continue to receive more carbon dioxide; when it is confirmed that the storage tank pressure is less than the first preset pressure, the current pressure of each adsorbent / desorber is continued to be checked to confirm whether these pressures are greater than the second preset pressure. If the current pressure of any adsorbent / desorber is less than the second preset pressure, it means that the carbon dioxide in the adsorbent / desorber has not been fully captured or is close to a pressure state. When the pressure of any adsorbent / desorber is less than the second preset pressure, the second multi-way valve is controlled to connect its inlet with the target outlet. The target outlet is connected to the inlet of the adsorbent / desorber whose current pressure is less than the second preset pressure to ensure that the exhaust gas flows to the appropriate adsorbent / desorber. At this time, the system can adjust the exhaust gas flow direction as needed to optimize the carbon dioxide capture efficiency.

[0077] In summary, by introducing multiple pressure sensors and intelligent control logic, the on-board carbon dioxide capture system can effectively monitor and adjust the status of each component and optimize the carbon dioxide capture and storage process.

[0078] As a possible implementation, the on-vehicle carbon dioxide capture system further includes a water tank, a water tank heating jacket arranged on the periphery of the water tank, a dry gas tank, and a dry gas tank heating jacket arranged on the periphery of the dry gas tank, wherein, among the multiple outlets of the first multi-way valve, except for one of the outlets connected to the inlet of the second multi-way valve, is connected to the water tank heating jacket, and another outlet is connected to the dry gas tank heating jacket. After determining whether the current pressure of the carbon dioxide storage tank is less than the first preset pressure, the method further includes: when the current pressure of the carbon dioxide storage tank is greater than or equal to the first preset pressure, issuing a prompt message, controlling the inlet of the second multi-way valve to be connected only to the atmospheric environment, and controlling the first multi-way valve to stop supplying gas to the water tank heating jacket and the dry gas tank heating jacket, wherein the prompt message is used to prompt that the carbon dioxide storage tank is full and needs to be unloaded.

[0079] Specifically, when unloading the carbon dioxide storage tank, the entire carbon capture system needs to be shut down. The specific method of shutting down the entire carbon capture system is to adjust the second multi-way valve so that it only opens to the atmosphere without supplying gas to each adsorbent / desorber, and adjust the first multi-way valve so that it no longer supplies gas to the water pipe heating jacket and the gas tank heating jacket. After the user gives the instruction to unload carbon dioxide, the carbon dioxide unloading control valve is opened to allow the carbon dioxide in the storage tank to flow to the appropriate destination. During the unloading process, when the measured value of the storage tank pressure sensor is lower than the preset limit, it means that the carbon dioxide in the storage tank has been basically unloaded and can be reused to store carbon dioxide. For example, the reference value for the case using MEA (ethanolamine) adsorption material is a preset limit of 100kPa.

[0080] As can be seen, the tank pressure sensor monitors pressure in real time, issues prompts, and implements control measures to prevent overpressure and precisely control the multi-way valve, ensuring effective coordination among system components and efficient CO2 processing. When the tank pressure reaches or exceeds the set threshold, the system issues a prompt to remind the operator to unload the tank, enhancing user interactivity and safety.

[0081] As a possible implementation, the vehicle-mounted carbon dioxide capture system further includes a water tank, a water tank heating jacket arranged on the periphery of the water tank, a dry gas tank, a dry gas tank heating jacket arranged on the periphery of the dry gas tank, a water pump and a water tank control valve. Among the multiple outlets of the first multi-way valve, one outlet is connected to the water tank heating jacket except for the outlet connected to the inlet of the second multi-way valve, and the other outlet is connected to the dry gas tank heating jacket. The inlet of the water pump is connected to the bottom of the carbon dioxide storage tank, and the outlet of the water pump is connected to the water tank. The water tank control valve is connected between the water vapor outlet of the water tank and the adsorbent / desorber. When determining whether the current pressure of each adsorbent / desorber is greater than the second preset pressure, After the pressure is applied, the method further includes: controlling the second multi-way valve to stop supplying gas to the adsorbent / desorber whose current pressure is greater than or equal to the second preset pressure, and controlling the first multi-way valve to supply gas to the water tank heating jacket, and starting the water pump, and controlling the water tank control valve to pass water vapor to the adsorbent / desorber whose current pressure is greater than the second preset pressure; after the steam purge for a first preset time period, controlling the first multi-way valve to stop supplying gas to the water tank heating jacket, and starting to supply gas to the dry gas tank heating jacket after stopping supplying gas to the water tank heating jacket; after the second preset time period, turning off the water pump and controlling the water tank control valve to stop passing water vapor to the corresponding adsorbent / desorber.

[0082] As can be seen, sensors monitor the adsorber / desorber pressure in real time, controlling the opening and closing of the multi-way valve based on pressure conditions. When necessary, steam is generated through a water tank and heating jacket and introduced into the adsorber / desorber to clean and optimize CO2 capture. A dry gas tank and heating jacket maintain dryness within the system, preventing moisture from interfering with CO2 capture efficiency.

[0083] As a possible implementation method, the on-board carbon dioxide capture system also includes a dry gas tank control valve, the inlet of the dry gas tank control valve is connected to the dry air outlet of the dry gas tank, and the multiple outlets of the dry gas tank control valve are respectively connected to multiple adsorbers / desorbers. After turning off the water pump and controlling the water tank control valve to stop the flow of water vapor to the corresponding adsorber / desorber, the method also includes: controlling the dry gas tank control valve to flow dry hot air to the corresponding adsorber / desorber; after a third preset time period, re-obtaining the current pressure of the corresponding adsorber / desorber, and when the current pressure is less than the third preset pressure, controlling the second multi-way valve to flow air to the adsorber / desorber.

[0084] Specifically, the third preset pressure setting depends on the characteristics of the selected capture material and is not a fixed value. For example, for MEA (ethanolamine) adsorption material, the third preset pressure is 30 kPa. When the current pressure is greater than or equal to the third preset pressure, the second multi-way valve is controlled to stop venting air to the adsorber / desorber in the branch in which it is located and instead vent air to the adsorbers / desorbers in other branches.

[0085] This shows that by integrating the dry gas tank control valve, the system can flexibly adjust the air supply and improve the effectiveness of CO2 capture. It can also enhance the gas processing capacity of the adsorber / desorber and improve system efficiency by adjusting the dry hot air.

[0086] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the method for capturing carbon dioxide by the vehicle-mounted carbon dioxide capture system of the present application will be described in detail below with reference to specific embodiments.

[0087] This embodiment relates to a specific method for capturing carbon dioxide using a vehicle-mounted carbon dioxide capture system. Figure 1 In the system shown, Figure 1 and Figure 3 As shown, it includes the control of the storage tank and the carbon dioxide adsorption / desorption regeneration control of a branch i as an example:

[0088] While the engine is running, the second multi-way valve 4 is temporarily closed to direct air flow to the atmosphere, and the first multi-way valve 3 remains in a state where it supplies air only to the adsorbers / desorbers 5. During this time, the CO2 storage tank 7 is first inspected and addressed. Pressure limits P1 and P2 are set (P1 > P2). When the value measured by the tank pressure sensor 8 reaches or exceeds P1, it indicates that the tank has stored a significant amount of CO2 and needs to be unloaded. The user is reminded to unload the CO2 and the entire carbon capture system is shut down. This is achieved by adjusting the second multi-way valve 4 to open only to the atmosphere, excluding air flow to the adsorbers / desorbers 5, and adjusting the first multi-way valve 3 to no longer supply air to the water pipe heating jacket 13 and the gas tank heating jacket 16. After the user issues a CO2 unloading instruction, the CO2 unloading control valve 9 is opened, allowing the CO2 in the tank to flow to the appropriate destination. During the unloading process, when the value measured by the tank pressure sensor 8 falls below P2, the CO2 in the tank has been largely unloaded and can be reused for CO2 storage.

[0089] When the storage tank pressure falls below P1, or the pressure after unloading falls below P2, taking branch i as an example, set carbon dioxide partial pressure limits P3 and P4 (P3 > P4). Read the measured value of the adsorber / desorber pressure sensor 6 in that branch. If it reaches or exceeds P3, it indicates that the adsorber / desorber 5 in that branch is nearing saturation and requires carbon dioxide desorption. At this point, the second multi-way valve 4 should be adjusted to divert engine exhaust from branch i and instead divert it to other branches that do not yet require desorption. Then, the multi-way valve 3 should be adjusted to divert some of the engine exhaust into the water tank heating jacket 13. This utilizes the exhaust waste heat to vaporize some of the liquid water in the water tank 11. The water pump 10 is then activated, and the water tank control valve 12 is adjusted to allow water vapor to flow into the adsorber / desorber 5 in branch i, purging the carbon dioxide adsorbed in the carbon capture material and enabling water recycling. After operating time t1, the steam purge is considered complete, and a dry hot air purge is then performed.

[0090] The control principle for dry hot air purging is similar to that for steam purging. First, adjust the first multi-way valve 3 so that engine exhaust no longer flows to the water tank heating jacket 13. Instead, it partially flows to the dry gas tank heating jacket 16, heating the air in the dry gas tank and shutting off the water vapor. This involves shutting off the water pump 10 and the water tank control valve 12, which stops the supply of water vapor to branch i. Simultaneously, the dry gas tank control valve 15 begins to flow dry air to the adsorber / desorber 5 in branch i. After time t2, the dry hot air purge is considered complete. At this point, the pressure sensor 6 of the adsorber / desorber in branch i is read again. If it is below P4, desorption regeneration is considered complete. Otherwise, steam purging and dry hot air purging must be repeated.

[0091] When the pressure of the adsorber / desorber is lower than P3 during operation, or when the pressure of the adsorber / desorber is lower than P4 after desorption and regeneration, carbon dioxide adsorption can be continued and monitoring can be maintained.

[0092] It can be seen that the method of this embodiment can ensure that the vehicle-mounted carbon dioxide capture system can effectively deal with the problem of carbon dioxide storage and release during operation, and achieve efficient capture and treatment.

[0093] An embodiment of the present invention provides a vehicle, comprising an on-board carbon dioxide capture system and an engine connected to the on-board carbon dioxide capture system.

[0094] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0095] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0096] The embodiment of the present application provides an on-vehicle carbon dioxide capture system comprising: a first multi-way valve, a second multi-way valve, and a plurality of adsorbers / desorbers, wherein the inlet of the first multi-way valve is used to communicate with the exhaust outlet of the engine, one of the multiple outlets of the first multi-way valve is connected to the inlet of the second multi-way valve, a preset outlet among the multiple outlets of the second multi-way valve is connected to the atmospheric environment, and all outlets of the multiple outlets of the second multi-way valve other than the preset outlet are connected to the adsorber / desorber, and the adsorber / desorber is connected to the outlet of the second multi-way valve in a one-to-one correspondence, wherein the adsorber / desorber is used to adsorb or desorb carbon dioxide from the engine exhaust. Carbon dioxide from the engine exhaust is captured by the carbon capture material through alternating adsorption / desorption and stored in a storage tank, and the desorption and regeneration of the capture material is driven by the waste heat of the exhaust. This solves the problem of low capture efficiency of the current method of directly capturing carbon dioxide from the air.

[0097] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A vehicle-mounted carbon dioxide capture system, characterized in that: include: a first multi-way valve, a second multi-way valve, a plurality of adsorbers / desorbers, wherein the inlet of the first multi-way valve is used to communicate with the exhaust outlet of the engine, one of the multiple outlets of the first multi-way valve is connected to the inlet of the second multi-way valve, a preset outlet among the multiple outlets of the second multi-way valve is connected to the atmospheric environment, and all outlets of the multiple outlets of the second multi-way valve except the preset outlet are connected to the adsorber / desorber, and the adsorber / desorber is connected to the outlet of the second multi-way valve in a one-to-one correspondence, wherein the adsorber / desorber is used to adsorb or desorb carbon dioxide in the exhaust gas of the engine; The vehicle-mounted carbon dioxide capture system further includes: a water tank, a water tank heating jacket disposed on the periphery of the water tank, a dry gas tank, and a dry gas tank heating jacket disposed on the periphery of the dry gas tank, wherein one of the multiple outlets of the first multi-way valve, except the outlet connected to the inlet of the second multi-way valve, is connected to the water tank heating jacket, and another outlet is connected to the dry gas tank heating jacket; The vehicle-mounted carbon dioxide capture system further comprises a carbon dioxide storage tank, the inlet of the carbon dioxide storage tank being in communication with the outlet of the adsorbent / desorber; The vehicle-mounted carbon dioxide capture system further includes a water tank control valve, wherein the inlet of the water tank control valve is connected to the water vapor outlet of the water tank, and the multiple outlets of the water tank control valve are respectively connected to the multiple adsorbers / desorbers, and the outlets of the water tank control valve correspond one to one with the adsorbers / desorbers; The on-vehicle carbon dioxide capture system also includes a dry gas tank control valve, the inlet of the dry gas tank control valve is connected to the dry air outlet of the dry gas tank, and the multiple outlets of the dry gas tank control valve are respectively connected to the multiple adsorbers / desorbers, and the outlets of the dry gas tank control valve correspond one-to-one to the adsorbers / desorbers.

2. The vehicle-mounted carbon dioxide capture system according to claim 1, characterized in that: The vehicle-mounted carbon dioxide capture system further includes a plurality of pressure sensors, which are respectively installed at pressure detection positions of the plurality of adsorbers / desorbers, and the pressure sensors correspond one to one with the adsorbers / desorbers.

3. The vehicle-mounted carbon dioxide capture system according to claim 1, characterized in that: The on-vehicle carbon dioxide capture system further includes a water pump, wherein an inlet of the water pump is connected to the bottom of the carbon dioxide storage tank, and an outlet of the water pump is connected to the water tank.

4. The vehicle-mounted carbon dioxide capture system according to claim 3, characterized in that: The vehicle-mounted carbon dioxide capture system further includes a tank pressure sensor installed at a pressure sensing position of the carbon dioxide tank.

5. The vehicle-mounted carbon dioxide capture system according to claim 4, characterized in that: The on-board carbon dioxide capture system also includes a carbon dioxide unloading control valve, the inlet of the carbon dioxide unloading control valve is connected to the carbon dioxide outlet of the carbon dioxide storage tank, and the outlet of the carbon dioxide unloading control valve is directly connected to the atmospheric environment or connected to the atmospheric environment through a post-processing system.

6. The vehicle-mounted carbon dioxide capture system according to claim 1, characterized in that: The vehicle-mounted carbon dioxide capture system further includes: an after-treatment system connected between the exhaust gas outlet of the engine and the inlet of the first multi-way valve.

7. A method for capturing carbon dioxide using the vehicle-mounted carbon dioxide capture system according to any one of claims 1 to 6, characterized in that: include: After starting the engine, the preset outlet of the second multi-way valve is controlled to be not connected to the inlet of the second multi-way valve, and the outlets of the second multi-way valve other than the preset outlet are controlled to be connected to the inlet of the second multi-way valve, the inlet of the first multi-way valve is controlled to be connected to the outlet connected to the inlet of the second multi-way valve, and the inlet of the first multi-way valve is controlled to be not connected to the outlet not connected to the inlet of the second multi-way valve, so as to use an adsorber / desorber to adsorb or desorb carbon dioxide in the exhaust gas discharged from the exhaust outlet of the engine.

8. The method according to claim 7, characterized in that The vehicle-mounted carbon dioxide capture system further includes a plurality of pressure sensors, a carbon dioxide storage tank, and a storage tank pressure sensor. The inlet of the carbon dioxide storage tank is communicated with the outlet of the adsorbent / desorber. The plurality of pressure sensors respectively detect the pressures of the plurality of adsorbents / desorbers, and the storage tank pressure sensor detects the pressure of the carbon dioxide storage tank. Controlling the outlets of the second multi-way valve other than the preset outlet to communicate with the inlet of the second multi-way valve includes: determining whether the current pressure of the carbon dioxide storage tank is less than a first preset pressure; When the current pressure of the carbon dioxide storage tank is less than the first preset pressure, continue to determine whether the current pressure of each of the adsorbers / desorbers is greater than a second preset pressure; When the current pressure of any of the adsorbers / desorbers is lower than the second preset pressure, the inlet of the second multi-way valve is controlled to communicate with its target outlet, where the target outlet is connected to the inlet of the adsorber / desorber whose current pressure is lower than the second preset pressure.

9. The method according to claim 8, characterized in that The vehicle-mounted carbon dioxide capture system further includes a water tank, a water tank heating jacket disposed on the periphery of the water tank, a dry gas tank, and a dry gas tank heating jacket disposed on the periphery of the dry gas tank, wherein, among the multiple outlets of the first multi-way valve, one outlet, except the outlet connected to the inlet of the second multi-way valve, is connected to the water tank heating jacket, and another outlet is connected to the dry gas tank heating jacket. After determining whether the current pressure of the carbon dioxide storage tank is less than a first preset pressure, the method further includes: when the current pressure of the carbon dioxide storage tank is greater than or equal to the first preset pressure, issuing a prompt message, controlling the inlet of the second multi-way valve to be connected only to the atmospheric environment, and controlling the first multi-way valve to stop supplying gas to the water tank heating jacket and the dry gas tank heating jacket, wherein the prompt message is used to indicate that the carbon dioxide storage tank is full and needs to be unloaded.

10. The method according to claim 8, characterized in that The on-vehicle carbon dioxide capture system further includes a water tank, a water tank heating jacket disposed on the periphery of the water tank, a dry gas tank, a dry gas tank heating jacket disposed on the periphery of the dry gas tank, a water pump, and a water tank control valve. Among the multiple outlets of the first multi-way valve, one outlet, except the outlet connected to the inlet of the second multi-way valve, is connected to the water tank heating jacket, and another outlet is connected to the dry gas tank heating jacket. The inlet of the water pump is connected to the bottom of the carbon dioxide storage tank, and the outlet of the water pump is connected to the water tank. The water tank control valve is connected between the water vapor outlet of the water tank and the adsorbent / desorber. After determining whether the current pressure of each of the adsorbent / desorbers is greater than a second preset pressure, the method further includes: controlling the second multi-way valve to stop supplying gas to the adsorbent / desorber whose current pressure is greater than or equal to the second preset pressure, controlling the first multi-way valve to supply gas to the water tank heating jacket, starting the water pump, and controlling the water tank control valve to supply water vapor to the adsorbent / desorber whose current pressure is greater than the second preset pressure; After a first preset time period of steam purge, the first multi-way valve is controlled to stop supplying gas to the water tank heating jacket, and then to start supplying gas to the drying gas tank heating jacket after stopping supplying gas to the water tank heating jacket; After a second preset time period, the water pump is turned off and the water tank control valve is controlled to stop supplying water vapor to the corresponding adsorber / desorber.

11. The method according to claim 10, characterized in that The on-vehicle carbon dioxide capture system further includes a dry gas tank control valve, wherein an inlet of the dry gas tank control valve is connected to a dry air outlet of the dry gas tank, and multiple outlets of the dry gas tank control valve are respectively connected to multiple adsorbers / desorbers. After turning off the water pump and controlling the water tank control valve to stop the flow of water vapor to the corresponding adsorbers / desorbers, the method further includes: Controlling the operation of the control valve of the drying gas tank to pass dry hot air to the corresponding adsorber / desorber; After a third preset time period, the current pressure of the corresponding adsorbent / desorber is reacquired, and when the current pressure is less than a third preset pressure, the second multi-way valve is controlled to operate to ventilate the adsorbent / desorber.

12. A vehicle, characterized in that: The vehicle-mounted carbon dioxide capture system comprises the vehicle-mounted carbon dioxide capture system according to any one of claims 1 to 6 and an engine connected to the vehicle-mounted carbon dioxide capture system.

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