A carbon dioxide decomposition system

Abstract

This invention provides a carbon dioxide decomposition system, relating to the field of carbon dioxide decomposition technology. The system includes a power source, a DBD discharge decomposition tube, a carbon dioxide cylinder, an oxygen filtration and collection device, and an oxygen monitoring device. The DBD discharge decomposition tube has an inlet pipe, an outlet pipe, and a separation tube. Two identical magnets with opposite magnetization directions are arranged on opposite sides of the separation tube. The power source is electrically connected to the DBD discharge decomposition tube. The carbon dioxide cylinder is connected to the inlet pipe. The separation tube is connected to both the oxygen filtration and collection device and the oxygen monitoring device. This invention decomposes carbon dioxide by energizing the DBD discharge decomposition tube. Magnets are placed on both sides of the separation tube. Under a magnetic field, oxygen is paramagnetic, while carbon dioxide and carbon monoxide are diamagnetic. The magnetic field can separate oxygen from carbon monoxide and carbon dioxide, thereby inhibiting secondary recombination of carbon monoxide and oxygen and improving the decomposition efficiency of carbon dioxide.

Description

Technical Field

[0001] This invention relates to the field of carbon dioxide decomposition technology, and more specifically, to a carbon dioxide decomposition system. Background Technology

[0002] Carbon dioxide, as a abundant, safe, inexpensive, and readily available renewable resource, can be chemically converted to achieve resource utilization of CO2, yielding high-value-added energy, materials, and chemical products. Therefore, since the mid-1970s, research on the activation and conversion of carbon dioxide has been a hot topic. Dielectric barrier discharge (DBD) is a non-equilibrium gas discharge in which an insulating dielectric is inserted into the discharge space, and plasma is generated by applying a sufficient alternating voltage. Discharge through a DBD device produces high-energy particles with energies of several to tens of electron volts, which can decompose carbon dioxide into carbon monoxide and oxygen. However, because oxygen and carbon monoxide are extremely unstable, they recombine into stable carbon dioxide during the discharge process, thus reducing the carbon dioxide conversion efficiency. Summary of the Invention

[0003] The problem this invention aims to solve is how to improve the conversion efficiency of carbon dioxide.

[0004] To address this, the present invention provides a carbon dioxide decomposition system, comprising a power supply, a DBD discharge decomposition tube, a carbon dioxide cylinder, an oxygen filtration and collection device, and an oxygen monitoring device. The DBD discharge decomposition tube is provided with an inlet pipe, an outlet pipe, and a separation pipe. Two magnets of the same shape but with opposite magnetization directions are arranged oppositely on both sides of the separation pipe. The power supply is electrically connected to the DBD discharge decomposition tube, the carbon dioxide cylinder is connected to the inlet pipe, and the separation pipe is connected to both the oxygen filtration and collection device and the oxygen monitoring device.

[0005] Optionally, the oxygen filtration and collection device includes a carbon monoxide filter, a carbon dioxide filter, a drying tube, and an oxygen cylinder connected in sequence.

[0006] Optionally, the magnet is a neodymium iron boron magnet.

[0007] Optionally, the carbon dioxide decomposition system further includes an oscilloscope electrically connected to the power supply, the oscilloscope being used to monitor the voltage and current of the power supply.

[0008] Optionally, a first gas mass flow meter is provided between the carbon dioxide cylinder and the inlet pipe.

[0009] Optionally, the DBD discharge decomposition tube includes a first quartz tube and a high-voltage metal electrode. The first quartz tube is sleeved around the high-voltage metal electrode. The inlet pipe and outlet pipe are respectively opened at both ends of the first quartz tube, and the separation tube is opened in the middle of the first quartz tube.

[0010] Optionally, a water supply pipe is fitted around the periphery of the first quartz tube.

[0011] Optionally, the carbon dioxide decomposition system also includes an emission spectrometer for monitoring the emission spectrum of carbon dioxide discharge.

[0012] Optionally, the carbon dioxide decomposition system further includes an optical fiber probe, one end of which is connected to the peripheral outer surface of the DBD discharge decomposition tube, and the other end is connected to the emission spectrometer. Optionally, the carbon dioxide decomposition system further includes a first mixing bottle, which is connected to the gas outlet pipe.

[0013] Optionally, the carbon dioxide decomposition system further includes a first mixing bottle, which is connected to the gas outlet pipe.

[0014] Compared with the prior art, the advantages of the carbon dioxide decomposition system of the present invention are:

[0015] This invention connects a DBD discharge decomposition tube to a power source, energizing the tube. The DBD discharge decomposition tube has an inlet pipe, an outlet pipe, and a separation pipe. The inlet pipe is connected to a carbon dioxide cylinder, allowing carbon dioxide to enter the tube. The carbon dioxide, decomposed by discharge, is converted into carbon monoxide and oxygen, which are then discharged through the outlet and separation pipes. Two identical magnets with opposite magnetization directions are positioned on opposite sides of the separation pipe. A mixture of carbon monoxide, oxygen, and carbon dioxide passes between the two magnets, creating a magnetic field. Oxygen has a relative magnetic susceptibility of 100, carbon dioxide -0.61, and carbon monoxide -0.34. Under the magnetic field, oxygen exhibits paramagnetism, with the concentration in the paramagnetic direction increasing with increasing magnetic field strength. Carbon dioxide and carbon monoxide, however, exhibit diamagnetic properties under the magnetic field, contrasting with the paramagnetism of oxygen. Conversely, oxygen can be separated from carbon monoxide and carbon dioxide using a magnetic field. Oxygen exits through a separation tube and flows to an oxygen filtration and collection device and an oxygen monitoring device connected to the separation tube. Carbon monoxide and undecomposed carbon dioxide exit through an outlet tube. The oxygen filtration and collection device filters out small amounts of carbon monoxide and carbon dioxide, collecting the separated oxygen. During the decomposition process, oxygen is continuously pre-separated to inhibit secondary recombination of carbon monoxide and oxygen, thus improving the decomposition efficiency of carbon dioxide. The oxygen monitoring device monitors the concentration of the separated oxygen and the content of small amounts of carbon monoxide and carbon dioxide mixed in with the oxygen. By adjusting the gas flow rate and power supply of the carbon dioxide cylinder, the changes in the content of small amounts of carbon monoxide and carbon dioxide mixed in the oxygen can be monitored, allowing for the identification of the gas flow rate and power supply of the carbon dioxide cylinder with the highest decomposition efficiency, thereby improving the overall decomposition efficiency of carbon dioxide. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the carbon dioxide decomposition system according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the DBD discharge decomposition tube according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1-Power supply; 2-DBD discharge decomposition tube; 21-Magnet; 22-Inlet pipe; 23-Outlet pipe; 24-Separation tube; 25-Water inlet pipe; 26-Water outlet pipe; 27-First quartz tube; 28-Second quartz tube; 29-High-voltage metal electrode; 3-Carbon dioxide cylinder; 4-Helium cylinder; 5-Oxygen monitoring device; 61-Carbon monoxide filter; 62-Carbon dioxide filter; 63-Drying tube; 64-Oxygen cylinder; 7-Oscilloscope; 8-Emission spectrometer; 9-First mixing bottle; 10-First gas mass flow meter; 11-Second mixing bottle. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] It should be noted that in the description of this invention, the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "top," "bottom," "front," "back," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention. They are not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0023] Furthermore, although specific embodiments have been described herein, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways not used in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

[0024] To solve the above problems, such as Figure 1 and Figure 2 As shown, the present invention provides a carbon dioxide decomposition system, including a power supply 1, a DBD discharge decomposition tube 2, a carbon dioxide cylinder 3, an oxygen filtration and collection device, and an oxygen monitoring device 5. The DBD discharge decomposition tube 2 is provided with an inlet pipe 22, an outlet pipe 23, and a separation pipe 24. Two magnets 21 of the same shape but with opposite magnetization directions are arranged on both sides of the separation pipe 24. The power supply 1 is electrically connected to the DBD discharge decomposition tube 2. The carbon dioxide cylinder 3 is connected to the inlet pipe 22. The separation pipe 24 is connected to the oxygen filtration and collection device and the oxygen monitoring device 5 respectively.

[0025] In this embodiment, the DBD discharge decomposition tube 2 is energized by connecting it to the power supply 1. The DBD discharge decomposition tube 2 has an inlet pipe 22, an outlet pipe 23, and a separation pipe 24. The inlet pipe 22 is connected to the carbon dioxide cylinder 3. Carbon dioxide enters the DBD discharge decomposition tube 2 through the inlet pipe 22. The carbon monoxide and oxygen produced by the discharge decomposition of carbon dioxide are discharged through the outlet pipe 23 and the separation pipe 24. Two identical magnets 21 with opposite magnetization directions are arranged on opposite sides of the separation pipe 24. A mixture of carbon monoxide, oxygen, and carbon dioxide passes between the two magnets 21, creating a magnetic field. The relative magnetic susceptibility of oxygen is 100, that of carbon dioxide is -0.61, and that of carbon monoxide is -0.34. Under the magnetic field, oxygen exhibits paramagnetism, and the concentration of oxygen in the paramagnetic direction increases with increasing magnetic field strength. Carbon dioxide and carbon monoxide, however, exhibit contramagnetism under magnetic field conditions. The magnetic field, unlike the paramagnetism of oxygen, allows for the separation of oxygen from carbon monoxide and carbon dioxide. Oxygen exits through the separation tube 24 and flows to the oxygen filtration and collection device and oxygen monitoring device 5, which are connected to the separation tube 24. Carbon monoxide and undecomposed carbon dioxide exit through the outlet tube 23. The oxygen filtration and collection device filters out small amounts of carbon monoxide and carbon dioxide, collecting the separated oxygen. During the decomposition process, oxygen is continuously pre-separated to inhibit secondary recombination of carbon monoxide and oxygen, thus improving the decomposition efficiency of carbon dioxide. The oxygen monitoring device 5 monitors the concentration of the separated oxygen and the content of small amounts of carbon monoxide and carbon dioxide mixed in the oxygen. By adjusting the gas flow rate of the carbon dioxide cylinder 3 and the power supply 1, the device monitors the changes in the content of small amounts of carbon monoxide and carbon dioxide mixed in the oxygen, finding the optimal gas flow rate of the carbon dioxide cylinder 3 and the power supply 1 for the highest carbon dioxide decomposition efficiency, thereby improving the overall carbon dioxide decomposition efficiency.

[0026] Specifically, the oxygen monitoring device 5 can also be filled with helium. Helium and a small amount of oxygen from carbon monoxide and carbon dioxide are filled into the oxygen monitoring device 5, wherein the helium content accounts for 99%. The helium is provided by the helium cylinder 4. The oxygen monitoring device 5 can be connected to a second mixing bottle 11 at the rear to collect the helium and a small amount of oxygen from carbon monoxide and carbon dioxide.

[0027] Optionally, such as Figure 1 As shown, the oxygen filtration and collection device includes a carbon monoxide filter 61, a carbon dioxide filter 62, a drying tube 63, and an oxygen cylinder 64 connected in sequence.

[0028] In this embodiment, by setting up a carbon monoxide filter 61 and a carbon dioxide filter 62, for example, the carbon monoxide filter 61 can be a tube containing copper oxide heated at high temperature, and the carbon dioxide filter 62 can be a beaker containing sodium hydroxide solution. Under heating conditions, the copper oxide reacts with carbon monoxide to produce carbon dioxide and copper. The carbon dioxide reacts with sodium hydroxide to produce sodium carbonate and water. The oxygen containing a small amount of carbon monoxide and carbon dioxide can be filtered by passing through the carbon monoxide filter 61 and the carbon dioxide filter 62 in sequence. After passing through the drying tube 63 to remove moisture, it can enter the oxygen cylinder 64 and be collected.

[0029] Optionally, the magnet 21 is a neodymium iron boron magnet.

[0030] In this embodiment, magnet 21 is set as neodymium iron boron magnet. Neodymium iron boron magnet is a permanent magnet with strong magnetic properties. The distance between the two neodymium iron boron magnets can be adjusted, which can change the magnetic field strength between the two magnets 21 and accelerate the oxygen expulsion rate.

[0031] Optionally, such as Figure 1 As shown, the carbon dioxide decomposition system also includes an oscilloscope 7, which is electrically connected to the power supply 1 and is used to monitor the voltage and current of the power supply 1.

[0032] In this embodiment, by connecting an oscilloscope 7 to the power supply 1, the voltage and current values ​​of the power supply 1 can be monitored in real time. Based on the feedback from the oxygen monitoring device 5, the voltage and current values ​​of the power supply 1 can be adjusted, thereby adjusting the decomposition rate of carbon dioxide.

[0033] Optionally, such as Figure 1 As shown, a first gas mass flow meter 10 is provided between the carbon dioxide cylinder 3 and the air inlet pipe 22.

[0034] In this embodiment, by setting a first gas mass flow meter 10 between the carbon dioxide cylinder 3 and the inlet pipe 22 to detect the carbon dioxide intake speed, the carbon dioxide intake speed can be adjusted according to the feedback from the oxygen monitoring device 5, thereby adjusting the carbon dioxide decomposition speed.

[0035] Optionally, such as Figure 2 As shown, the DBD discharge decomposition tube 2 includes a first quartz tube 27 and a high-voltage metal electrode 29. The first quartz tube 27 is sleeved around the high-voltage metal electrode 29. The air inlet pipe 22 and the air outlet pipe 23 are respectively opened at both ends of the first quartz tube 27, and the separation pipe 24 is opened in the middle of the first quartz tube 27.

[0036] In this embodiment, a first quartz tube 27 and a high-voltage metal electrode 29 are provided. The high-voltage metal electrode 29 has a rod-shaped structure and is connected to the power supply 1. The first quartz tube 27 is sleeved on the outside of the high-voltage metal electrode 29. An air inlet pipe 22 and an air outlet pipe 23 are respectively opened at both ends of the first quartz tube 27. A separation pipe 24 is opened in the middle of the first quartz tube 27. Carbon dioxide can enter the gap between the first quartz tube 27 and the high-voltage metal electrode 29 from the air inlet pipe 22 and be discharged and decomposed.

[0037] Optionally, such as Figure 2 As shown, a water supply pipe is sleeved around the first quartz tube 27.

[0038] In this embodiment, by installing a water supply pipe around the first quartz tube 27, with the water supply pipe serving as a grounding electrode and liquid water as the grounding electrode, the temperature of the DBD discharge decomposition tube 2 is kept constant during the discharge process, thus avoiding the transition of the carbon dioxide decomposition process from plasma catalysis to thermal decomposition, thereby improving the carbon dioxide decomposition efficiency.

[0039] Specifically, a second quartz tube 28 can be sleeved around the first quartz tube 27. The two ends of the second quartz tube 28 are respectively provided with an inlet pipe 25 and an outlet pipe 26 to supply water to the DBD discharge decomposition tube 2.

[0040] Optionally, such as Figure 1 As shown, the carbon dioxide decomposition system also includes an emission spectrometer 8, which is used to monitor the emission spectrum of carbon dioxide discharge.

[0041] In this embodiment, both water and the quartz tube are transparent, allowing an emission spectrometer 8 to be connected to the outside of the first quartz tube 27 to monitor the discharge within the tube in real time. Emission spectra of carbon dioxide discharge are collected at 2mm intervals on both sides of the neodymium iron boron magnet. The intensity of characteristic spectral lines in the emission spectra is used to preliminarily analyze the decomposition of carbon dioxide and its decomposed carbon monoxide and oxygen. By monitoring the emission spectrum of carbon dioxide discharge, the spatial distribution of carbon dioxide in plasma catalytic conversion is studied. The concentrations of carbon dioxide, carbon monoxide, and oxygen at various locations within the first quartz tube 27 are monitored, enabling real-time adjustment of relevant influencing factors, such as the power of the power supply 1, the carbon dioxide gas flow rate, and the magnetic field distribution of the magnet 21, thereby improving the decomposition efficiency of carbon dioxide.

[0042] Optionally, the carbon dioxide decomposition system further includes an optical fiber probe, one end of which is connected to the peripheral outer surface of the DBD discharge decomposition tube 2, and the other end is connected to the emission spectrometer 8.

[0043] In this embodiment, by setting an optical fiber probe, a slot can be provided on the peripheral outer surface of the DBD discharge decomposition tube 2, and the optical fiber probe can be inserted into the slot. The other end of the optical fiber probe is connected to the emission spectrometer 8, which facilitates the emission spectrometer 8 to monitor the emission spectrum of carbon dioxide discharge. There can be two optical fiber probes, which are respectively connected to the two ends of the peripheral outer surface of the DBD discharge decomposition tube 2.

[0044] Optionally, such as Figure 1 As shown, the carbon dioxide decomposition system also includes a first mixture bottle 9, which is connected to the gas outlet pipe 23.

[0045] In this embodiment, by setting up a first mixing bottle 9, which is connected to the gas outlet pipe 23, the decomposed carbon monoxide and undecomposed carbon dioxide can be collected, preventing them from being directly released into the air and causing poisoning.

[0046] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A carbon dioxide decomposition system, characterized in that, The device includes a power supply (1), a DBD discharge decomposition tube (2), a carbon dioxide cylinder (3), an oxygen filtration and collection device, and an oxygen monitoring device (5). The DBD discharge decomposition tube (2) is equipped with an inlet pipe (22), an outlet pipe (23), and a separation pipe (24). Two magnets (21) of the same shape but opposite magnetization directions are arranged on both sides of the separation pipe (24). The power supply (1) is electrically connected to the DBD discharge decomposition tube (2). The carbon dioxide cylinder (3) is connected to the inlet pipe (22). The separation pipe (24) is connected to the oxygen filtration and collection device and the oxygen monitoring device (5) respectively. The DBD discharge decomposition tube (2) includes a first quartz tube (27) and a high-voltage metal electrode (29). The first quartz tube (27) is sleeved around the high-voltage metal electrode (29). The air inlet pipe (22) and the air outlet pipe (23) are respectively opened at both ends of the first quartz tube (27). The separation pipe (24) is opened in the middle of the first quartz tube (27). A water supply pipe is sleeved around the first quartz tube (27). A second quartz tube (28) is sleeved around the first quartz tube (27). A water inlet pipe (25) and a water outlet pipe (26) are respectively provided at both ends of the second quartz tube (28). The water inlet pipe (25) and the water outlet pipe (26) are respectively used to supply water and drain water to the DBD discharge decomposition tube (2).

2. The carbon dioxide decomposition system according to claim 1, characterized in that, The oxygen filtration and collection device includes a carbon monoxide filter (61), a carbon dioxide filter (62), a drying tube (63), and an oxygen cylinder (64) connected in sequence.

3. The carbon dioxide decomposition system according to claim 1, characterized in that, The magnet (21) is a neodymium iron boron magnet.

4. The carbon dioxide decomposition system according to claim 1, characterized in that, It also includes an oscilloscope (7), which is electrically connected to the power supply (1) and is used to monitor the voltage and current of the power supply (1).

5. The carbon dioxide decomposition system according to claim 1, characterized in that, A first gas mass flow meter (10) is provided between the carbon dioxide cylinder (3) and the inlet pipe (22).

6. The carbon dioxide decomposition system according to claim 1, characterized in that, It also includes an emission spectrometer (8) for monitoring the emission spectrum of carbon dioxide discharge.

7. The carbon dioxide decomposition system according to claim 6, characterized in that, It also includes an optical fiber probe, one end of which is connected to the peripheral outer surface of the DBD discharge decomposition tube (2), and the other end is connected to the emission spectrometer (8).

8. The carbon dioxide decomposition system according to claim 1, characterized in that, It also includes a first mixture bottle (9), which is connected to the gas outlet pipe (23).

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