64 results about "Carbon dioxide removal" patented technology

In a general aspect, a carbon dioxide removal system is presented. In some cases, a gas-liquid contactor is wetted with an alkaline capture solution. A first flow from a first gaseous feed including CO2 from a first source is directed to interact with the alkaline capture solution in the gas-liquid contactor, which forms a first CO2-rich alkaline capture solution. A second flow from a second gaseous feed including CO2 from a second, distinct source is directed to interact with the first CO2-rich alkaline capture solution, which forms a second CO2-rich alkaline capture solution. In some cases, the second flow is independent of the first gaseous feed, and a concentration of CO2 in the second CO2-rich alkaline capture solution is higher than a concentration of CO2 in the first CO2-rich alkaline capture solution. CO2 can be separated from the second CO2-rich alkaline capture solution.

In a general aspect, a carbon dioxide (CO2) removal system uses geothermal energy. In some implementations, a method to remove CO2 gas from a gaseous feed includes directing a gaseous feed to interact with an alkaline capture solution in a first gas-liquid contactor. A first portion of CO2 from the gaseous feed dissolves into the alkaline capture solution to form a CO2-rich alkaline capture solution. Steam is generated using heat from a geothermal heat source, and the steam heats the CO2-rich alkaline capture solution in a second gas-liquid contactor. A second portion of the CO2 is separated from the CO2-rich alkaline capture solution in the second gas-liquid contactor to form a CO2-lean alkaline capture solution. The CO2-lean alkaline capture solution is directed to the first gas-liquid contactor.

The invention discloses a method for monitoring atmospheric carbon dioxide removal efficiency of seawater alkalization, and belongs to the technical field of ocean negative emission and geochemical monitoring. The method comprises the following steps: 1) collecting a seawater sample; 2) determining the alkalinity of carbonate; (3) calculating the CO2 removal efficiency; based on the difference value of carbonate alkalinity before and after alkalization, the removal effectiveness CDR of atmospheric carbon dioxide is calculated, and the calculation formula is as follows: CDR = CAT-CA0; wherein CDR is atmospheric CO2 removal efficiency after seawater alkalization engineering is implemented, and the unit is mol CO2 kg <-1 >; cA0 and CAt are respectively carbonate alkalinity before and after seawater alkalization, and the unit is mol kg <-1 >.

A process for producing hydrogen comprising the steps of reforming a hydrocarbon feedstock to form a synthesis gas; subjecting the synthesis gas to one or more stages of water gas shift to convert carbon monoxide to carbon dioxide and form a hydrogen-enriched synthesis gas; and treating the hydrogen-enriched synthesis gas to form a purified hydrogen product and tail gas stream containing methane, wherein at least a portion of the tail gas stream is treated by subjecting it to partial oxidation or autothermal reforming to form a partially-oxidised or reformed tail gas, followed by of water gas shift of the partially-oxidised or reformed tail gas to form a hydrogen-enriched tail gas, and a step of carbon dioxide removal from the hydrogen-enriched tail gas to form a hydrogen stream and a carbon dioxide stream, wherein the carbon dioxide stream is recovered and a portion of the hydrogen stream is a fuel.

The disclosed invention includes a method of making a carbon dioxide-removing insulating material composition and the resulting carbon dioxide-removing insulating material composition, the material composition having sufficiently low thermal conductivity, the material composition is of the carbon dioxide removal type and thus absorbs more CO2 from the atmosphere during its production and use than it emits and can permanently sequestration this CO2. This is achieved by using at least one pyrolysis step of thermally insulating biomass particles bound to a further binder or a binder contained in the material or by directly compositing the thermally insulating biomass particles after pyrolysis to produce a composition that is shaped at macroscopic and microscopic levels.

The utility model discloses a carbon dioxide removal machine for a fresh-keeping air-conditioned cold store, which belongs to the field of carbon dioxide removal machines and is characterized in that a fixed box and a carbon dioxide removal device are connected with a filter cartridge through a joint, the upper part of the side wall of the filter cartridge is provided with a connecting pipe and is connected with a fan through the connecting pipe, and the upper end of the fan is provided with a butt joint pipe connected with a first flow store air pipe; filtering and flow acceleration are realized through the filter cartridge and the fan; the upper end of the filter cartridge is connected with a sealing cover through a fastening bolt, and a connecting piece is mounted at the upper end of the sealing cover, so that the sealing cover can be conveniently opened to replace filter cloth in the filter cartridge. The filter cartridge and the fan are combined, so that the air flowing speed in the air-conditioned cold store can be remarkably increased, and the carbon dioxide removal efficiency is effectively improved. By means of the design, the sealing performance and stability of long-time operation of the device are guaranteed, and continuous and efficient work of the carbon dioxide removing machine is guaranteed. Efficient removal of carbon dioxide is crucial to food preservation, the preservation period can be remarkably prolonged, and the freshness and quality of food are ensured.

A carbon dioxide removal system includes: a flow path through which a target gas flows; a treatment unit including adsorption towers connected in series in the flow path; and a control device that switches between paths of the target gas. The flow path includes: a first main path that supplies the target gas to the treatment unit; a first recovery path that discharges, to a target space, the target gas passed through the first main path; a desorption path connected to the adsorption towers; a first branch path that connects a path between the adsorption towers on upstream and downstream sides to the first recovery path; and a switching mechanism that switches a path through which the target gas flows. The desorption path is connectable in parallel to the adsorption towers.

A chemical plant comprising an off-gas treatment unit, OUT, arranged to accept a hydrocarbon-containing fuel stream comprising hydrocarbons, steam, and hydrogen. The OTU comprises: (i) hydrogen membrane separation unit 102 arranged to accept hydrocarbon containing fuel stream 101 and produce permeate stream 104 and retentate stream 103; (ii) a reforming section comprising a partial oxidation reactor or an autothermal reformer 108, arranged to accept the retentate stream and produce reformed gas stream 109; (iii) water-gas shift section 110 arranged to accept said reformed gas stream and produce shifted gas stream 111; and (iv) carbon dioxide removal section 116 arranged to accept said shifted gas stream and produce CO2 rich stream 117 and hydrogen product stream 118. The permeate stream and / or the hydrogen product stream is used as a low carbon fuel. A method for converting a hydrocarbon-containing fuel stream into a low carbon fuel in such an off-gas treatment unit is also described. A retrofitting method for a chemical plant, in which an off-gas treatment unit as described is installed is also disclosed.

This invention proposes a deep-sea seabed observation device based on bidirectional concentration gradient gas exchange for dissolved oxygen compensation, belonging to the field of deep-sea exploration and marine instrumentation technology. It solves the problems of existing deep-sea seabed in-situ observation devices, such as the inability to achieve low-disturbance dissolved oxygen compensation and carbon dioxide removal during long-term closed observations, and the difficulty in adapting to extreme high pressures in the deep sea to achieve pressure stabilization, leading to deterioration of the observation environment, data distortion, and insufficient equipment reliability. It includes an observation unit, a power and chemistry unit, and a fixed lifting system. The observation unit comprises an observation cabin, a membrane module installed on the bottom of the observation cabin's hatch, and a circulation hose connected to the membrane module. The membrane module includes a membrane module frame and a PTFE tube fixed to the membrane module frame in a spiral configuration. The PTFE tube is a microporous hose that enables bidirectional concentration gradient gas exchange. The power and chemistry unit is installed at the front panel of the observation cabin via a power and chemistry unit mounting component. It is mainly used for deep-sea seabed observation.

The utility model discloses a gas removal controlled atmosphere fresh-keeping storehouse, which belongs to the technical field of carbon dioxide removal, and comprises a controlled atmosphere storehouse, a drying pipe communicated and connected with the controlled atmosphere storehouse, a flow storehouse air pipe communicated and connected with the drying pipe, and a carbon dioxide concentration sensor arranged on the inner side of the controlled atmosphere storehouse, an air extracting pump is installed on the outer side, away from the drying pipe, of the air-conditioned cold store through a support, the input end of the air extracting pump is connected with the air-conditioned cold store in a communicating mode, and the output end of the air extracting pump is connected with the flow store air pipe in a communicating mode. The carbon dioxide in the gas is continuously desorbed by utilizing the collection solution in the second collection box, and meanwhile, the collection solution in the first collection box is replaced, so that the carbon dioxide contained in the gas in the air-conditioned cold store can be continuously desorbed.

The method comprises a flue gas desulfurizing step using an ammonia-based desulfurizing scrubber to remove sulfur oxides from the flue gas A further step comprises processing the desulfurized flue gas through an ammonia-utilizing carbon dioxide capture unit, to remove carbon dioxide therefrom. The desulfurizing step comprises recycling desulfurized flue gas as an oxidant towards the desulfurizing scrubber. Also disclosed herein is a system for flue gas desulfurization and carbon dioxide removal.

The application discloses a kind of without heating regeneration carbon dioxide normal temperature removal process and system, belong to natural gas decarburization field;A kind of without heating regeneration carbon dioxide normal temperature removal process, comprising the following steps:S1, raw material gas pretreatment;S2, CO2 absorption;S3, rich liquid flash evaporation;S4, lean liquid regeneration;S5, material circulation;The application is effectively solved by the absorption part of being set, the pain point that edge filler reaction is not sufficient, the low life of central filler;Can shake and scatter adhesion filler ball, clean filter hole impurity, avoid filter hole blockage, further improve gas-liquid mass transfer efficiency;Can buffer knock impact force, prevent that filler plate is damaged;Can effectively protect electric telescopic rod, and maintenance is convenient, need not to disassemble whole tower body, shorten maintenance cycle, guarantee production continuity;Can avoid liquid flooding, channeling phenomenon.

The invention discloses a chamber interior air conditioning system which comprises a chamber, a first air inlet mechanism, a first air inlet pipeline, a carbon dioxide removing mechanism, a second air inlet pipeline, an exhaust pipeline, a first communicating valve and a second communicating valve. The carbon dioxide removal mechanism comprises a first carbon dioxide adsorption and desorption tower and a second carbon dioxide adsorption and desorption tower which are used for alternately adsorbing and desorbing carbon dioxide, and the chamber is communicated with a gas outlet pipeline and a gas return pipeline; the first communicating valve is used for selectively communicating the second gas inlet pipeline and the gas outlet pipeline with the first carbon dioxide adsorption and desorption tower and the second carbon dioxide adsorption and desorption tower in pairs; and the second communicating valve is used for selectively communicating the gas exhaust pipeline and the gas return pipeline with the first carbon dioxide adsorption and desorption tower and the second carbon dioxide adsorption and desorption tower in pairs. The air conditioning system in the chamber not only can meet the requirement for maintaining the qualified carbon dioxide content in the chamber, but also can meet the requirement for maintaining the qualified pressure in the chamber.

Methods and systems for carbon dioxide removal are disclosed herein. In some embodiments, a representative carbon dioxide removal apparatus includes a web with a sorbent configured to absorb carbon dioxide and a drive system operably coupled to the web. The drive system can transport the web from a first zone, in which the web is exposed to gas, to a second zone, where the first zone is at a first temperature and the second zone is at a second temperature greater than the first temperature. The apparatus can further include a heating mechanism configured to increase a temperature of the second zone at least to the second temperature. This causes the removal of fluid including carbon dioxide from the web within the second zone.

The invention discloses an artificial intelligence self-adaptive temperature and humidity regulation and control system for agricultural products, and relates to the technical field of intelligent environment control and agricultural intellectualization, the artificial intelligence self-adaptive temperature and humidity regulation and control system comprises a culture bin shell and an isolation plate arranged in the culture bin shell, and the two sides of the isolation plate are provided with a pipeline system and a control system respectively; the control system comprises a temperature adjusting fan, an atomizing sprayer, an electric control box, a frequency conversion type temperature control equipment outdoor unit, a carbon dioxide removal device, an external circulation water curtain device, an intelligent airflow adjusting valve and an air purification pipeline. The system can realize automatic monitoring and accurate control of a cultivation environment, has the advantages of energy conservation, high efficiency, good environment balance, high intelligent degree and the like, and is suitable for intelligent storage and cultivation scenes of multiple crops such as sweet potatoes, fruits and vegetables, edible mushrooms, flowers and the like; the problems of environment control lag, energy waste and uneven climate distribution in an existing storage and cultivation system can be effectively solved.

The invention relates to the technical field of natural gas ethane recovery and light hydrocarbon recovery, in particular to a system and method for removing carbon dioxide during natural gas ethane recovery. Comprising a dehydration device, a first flow divider connected with the dehydration device, a first heat exchanger connected with the first flow divider, a second heat exchanger connected with the first heat exchanger, a first low-temperature separator connected with the first heat exchanger, a second low-temperature separator connected with the first heat exchanger and the second heat exchanger, a first rectifying tower and a first reboiler, the decarbonization device is connected with the first flow divider; the other end of the decarburization device is connected with the first heat exchanger; the first heat exchanger is further connected with a pressurizing and cooling unit, the pressurizing and cooling unit is externally connected with an LNG / helium extraction device, and the first rectifying tower and the second heat exchanger are externally connected with a denitrification / helium extraction / LNG liquefaction device. Carbon dioxide removal treatment does not need to be conducted on all natural gas, and the power of a regeneration gas compressor and the heat loads of a heater and a cooler are reduced.

The utility model discloses a kind of carbon dioxide removal devices, the first flange of carbon dioxide removal cylinder bottom is fastened and connected with the second flange of cylindrical water tank top end connecting port, first flange upper surface is provided with several first reinforcing plates, second flange lower surface and between cylindrical water tank are provided with several second reinforcing plates, the periphery in cylindrical water tank inside and along axial direction are provided with several support columns, the bottom of carbon dioxide removal cylinder is equipped with conical bottom plate, the outlet at the center position of conical bottom plate is provided with annular plate with filter screen, outlet bottom is connected with U-shaped water seal, the utility model structure is reasonable, up-down structure greatly reduces site occupancy rate, and by the strengthening of reinforcing plate and support column, it has good connection strength and structural stability as a whole, the outlet of conical bottom plate is installed with U-shaped water seal, avoid the stench generated in cylindrical water tank into carbon dioxide removal cylinder, and the filter screen at the outlet of conical bottom plate can intercept impurities in waste water, realize the function of filtration.

In a general aspect, a carbon dioxide (CO2) removal system uses geothermal energy. In some implementations, a method to remove CO2 gas from a gaseous feed includes directing a gaseous feed to interact with an alkaline capture solution in a first gas-liquid contactor. A first portion of CO2 from the gaseous feed dissolves into the alkaline capture solution to form a CO2-rich alkaline capture solution. Steam is generated using heat from a geothermal heat source, and the steam heats the CO2-rich alkaline capture solution in a second gas-liquid contactor. A second portion of the CO2 is separated from the CO2-rich alkaline capture solution in the second gas-liquid contactor to form a CO2-lean alkaline capture solution. The CO2-lean alkaline capture solution is directed to the first gas-liquid contactor.

The invention relates to the technical field of intensive care units, in particular to an animal ICU intensive care unit carbon dioxide removing system and a control method.The animal ICU intensive care unit carbon dioxide removing system comprises an ICU unit body, a circulating pump, a gas washing bottle, a pressure sensor and a controller, the ICU unit body is provided with a gas inlet and a gas outlet, a circulating fan in the ICU unit body is started, and the carbon dioxide sensor detects the concentration of carbon dioxide in the unit body in real time; comparing the concentration with a preset concentration; when the concentration of the carbon dioxide is higher than the preset concentration, the controller starts the circulating pump, the circulating pump extracts air in the ICU cabin into the gas washing bottle for gas washing, the carbon dioxide in the air is removed, and the gas-washed air flows back to the ICU cabin; when the carbon dioxide sensor detects that the concentration of carbon dioxide in the cabin is lower than the preset concentration, the controller closes the circulating pump, the system eliminates carbon dioxide in an ICU cabin body'internal circulation 'mode, it is avoided that traditional'external circulation' blows to dilute the concentration of carbon dioxide in the inner cabin and disturb the environment of the inner cabin, and it is guaranteed that the temperature, humidity and oxygen concentration in the monitoring cabin are in the constant environment.

Systems and methods for an atmospheric carbon dioxide removal system that includes a plurality of carbon capture containers, a plurality of fans, an air diverter, and a velocity stack. Each of the carbon capture containers has an outwardly facing side and an inwardly facing side with the inwardly facing side facing an enclosed space. The fans are disposed adjacent to the carbon capture containers. The fans are arranged to move air through the carbon capture containers in a first direction from the outwardly facing side into the enclosed space. The air diverter is disposed within the enclosed space and receives the air flowing in the first direction and redirects the air to flow in a second direction that is angled upwardly from the first direction. The velocity stack is disposed on top of the enclosed space and is configured to accelerate the flow of the air in the second direction.

Technologies for modeling carbon dioxide removal include a compute device with circuitry configured to obtain parameter data for use in modeling carbon dioxide removal from the atmosphere through enhanced rock weathering. The circuitry may also be configured to produce, using one or more models from a library of models, at least one prediction indicative of an amount of carbon dioxide that will be removed through enhanced rock weathering, including simulating co-precipitation of iron with one or more toxic metals. Further, the circuitry may be configured to present a visual representation of the at least one prediction in a user interface. Other embodiments are also described and claimed.

The present disclosure relates to a process for the synthesis of methanol with low carbon dioxide emissions. A purge gas stream from the methanol circuit is treated in a purge gas treatment unit by steps of reforming, water gas shift, and carbon dioxide removal to form a hydrogen stream that is used as a fuel, such as a process stream within a heated reforming operation, the methanol circuit, and / or the purge gas treatment unit. The present disclosure also relates to a method of retrofitting a methanol production unit by installing a purge gas treatment unit as described.

A method and system for monitoring, reporting, and verification of enhanced rock weathering is disclosed. In some embodiments, the method includes emitting, using a spectroscopy device, one or more optical signals directed to a target collected from a target area. The method includes determining, using the spectroscopy device, spectral measurements of the optical signals collected from the target. The method includes converting, using a data analysis subsystem, the spectral measurements to data indicating compositional characteristics of the target. The method also includes analyzing, by the data analysis subsystem, the data indicating compositional characteristics of the target using a plurality of analytical tools. The method further includes providing, using the data analysis subsystem, assessments on carbon dioxide removal and insights on enhanced rock weathering.

Process for the co-production of ammonia and methanol with reduced carbon dioxide emission comprising the steps of (a) providing a hydrocarbon feed stock; (b) preheating the hydrocarbon feed stock in a fired heater and / or a reformer waste heat section; (c) steam reforming the preheated hydrocarbon feed stock in at least one steam re-former to a raw synthesis gas comprising hydrogen and carbon oxides where the module M is <2.05; (d) splitting the raw synthesis gas into a first and second stream; (e) passing the first stream of the raw synthesis gas to water gas shift section comprising one or more shift reactors for generating a shifted synthesis gas; (f) passing the shifted synthesis gas to a carbon dioxide removal section for generating a carbon dioxide depleted synthesis gas; (g) cleaning the carbon depleted synthesis gas in a cleaning unit to a cleaned synthesis gas comprising hydrogen or hydrogen and nitrogen, optionally adding nitrogen to the cleaned synthesis gas to generate an ammonia synthesis gas with a molar ratio of hydrogen to nitrogen of between 2.9-3.1; (h) converting the ammonia synthesis gas to ammonia; and (i) passing the second stream of the raw synthesis gas to a cooling and water separation section to generate a water depleted synthesis gas; (j) adding a part of the of the carbon depleted synthesis gas from step (f) to the water depleted synthesis gas to generate a methanol synthesis gas with a module M>1.95; (k) converting the methanol synthesis gas in at least one methanol reactor to methanol and withdrawing a raw methanol product and a purge gas stream containing unconverted methanol synthesis gas; wherein the purge gas stream from step (k) is added to the first stream of the raw synthesis gas upstream to step (e) and / or to the steam reforming in step (c).

In a general aspect, a carbon dioxide (CO2) removal system uses geothermal energy. In some implementations, a method to remove CO2 gas from a gaseous feed includes directing a gaseous feed to interact with an alkaline capture solution in a first gas-liquid contactor. A first portion of CO2 from the gaseous feed dissolves into the alkaline capture solution to form a CO2-rich alkaline capture solution. Steam is generated using heat from a geothermal heat source, and the steam heats the CO2-rich alkaline capture solution in a second gas-liquid contactor. A second portion of the CO2 is separated from the CO2-rich alkaline capture solution in the second gas-liquid contactor to form a CO2-lean alkaline capture solution. The CO2-lean alkaline capture solution is directed to the first gas-liquid contactor.

A method of measuring captured carbon from an atmosphere includes modeling a mining-influenced water body, measuring a carbon content of the mining-influenced water body, contacting the mining-influenced water with an alkaline material to form a mining- influenced water and alkaline mixture, measuring a parameter of the mining-influenced water and alkaline mixture over time, measuring the carbon content of the mining-influenced water body, and calculating the amount of carbon captured from the atmosphere.

A heat exchange assembly 118 for a solid fuel burning stove 100 comprises an inlet 20 receiving combustion exhaust gas, and a heat exchange element 102 which extracts heat from the exhaust gas to form cooled exhaust gas. A ventilation device 104 propels the cooled exhaust gas towards an outlet 22. The heat exchange element may comprise a flue pipe 18. The heat exchange assembly may comprise a plurality of heat exchange elements. The heat exchange assembly may be coupled in-line between a stove and a standard flue liner with the outlet coupled to a chimney or hole in a wall via a tube. Water may be used to cool the exhaust gas to produce heated water which is circulated through a radiator system. A pre-heat exchange section at the inlet may comprise a metal, ceramic, or catalysing scrim. A particulate filter (208, Fig. 3b) may be located at the outlet and the assembly may have further particulate removal, gas cleaning, or carbon dioxide removal means. The ventilation means may be controlled manually, by timers, or remotely, to control or extinguish a fire in the stove. A stove and a method of installation are also claimed.

The utility model discloses a system for capturing carbon dioxide in flue gas of a rotary kiln, which relates to the technical field of waste gas treatment and comprises a flue gas purification tower, a booster fan and a regeneration tower are arranged at the front end of the flue gas purification tower, and a carbon dioxide removal tower is arranged between the regeneration tower and the flue gas purification tower. A decarburizing agent recovery tower and an acid gas treatment assembly are arranged above the carbon dioxide removal tower, the acid gas treatment assembly comprises an acid gas condenser, an acid gas extraction device connected with the rear end of the acid gas condenser, and the acid gas condenser is connected with the flue gas purification tower and the regeneration tower; the heat exchange assembly comprises a lean and rich liquid heat exchanger located between the regeneration tower and the carbon dioxide removal tower and used for conducting heat exchange on rich liquid discharged from the carbon dioxide removal tower and lean liquid discharged from the regeneration tower, heat exchange is conducted through solutions with different temperatures generated in the system, the use amount of heat exchange media is reduced, and the purpose of reducing cost is achieved.

The invention discloses a carbon dioxide removal system, which relates to the technical field of gas treatment systems, and comprises a first adsorption tower, a second adsorption tower, a refrigeration compressor, a drying filter, a condenser, a heat exchanger, an evaporator and a base, a first outlet of the heat exchanger is connected with the evaporator through a first pipeline, the evaporator is connected with the first adsorption tower and the second adsorption tower through second pipelines, the refrigeration compressor is connected with the condenser through a third pipeline, the condenser is connected with the drying filter through a fourth pipeline, and the drying filter is connected with the evaporator through a fifth pipeline. A wet air inlet is formed in the heat exchanger and connected with the compressor. The condenser, the drying filter, the condenser and the adsorption tower are reasonably combined together through the compressed air pipeline and are skid-mounted on the base, so that respective advantages of a refrigeration dryer and a suction dryer are integrated.

The utility model discloses a trace methane and nitrous oxide isotope component separation, conversion and enrichment device, and belongs to the technical field of isotope analysis and test. Comprising a methane sample tube, a nitrous oxide sample tube, a helium bottle, a first Nafion trap, a VOC adsorption trap, a combustion tube, a four-way valve, an eight-way valve, a carbon dioxide removal assembly, a first enrichment cold trap, a second enrichment cold trap and a chromatographic column, the helium tank is communicated with the gas inlet ends of the methane sample tube and the nitrous oxide sample tube, the gas outlet end of the methane sample tube is communicated with the first Nafion trap and the VOC adsorption trap, the VOC adsorption trap is communicated with the carbon dioxide removal assembly through a four-way valve, the carbon dioxide removal assembly is communicated with a combustion tube, the combustion tube is communicated with the first enrichment cold trap through an eight-way valve, and the combustion tube is communicated with the second enrichment cold trap through an eight-way valve. The first enrichment cold trap is communicated with a second enrichment cold trap through an eight-way valve, and the second enrichment cold trap is communicated with the chromatographic column. According to the utility model, methane or nitrous oxide gas in the air can be separated, converted and enriched, so that methane or nitrous oxide in the air can be measured by instruments such as a mass spectrometer and the like.