CN115504469B - System and method for cooperatively converting carbon dioxide by water-assisted plasma and photocatalyst - Google Patents
System and method for cooperatively converting carbon dioxide by water-assisted plasma and photocatalyst Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 69
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 37
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 29
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 88
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 230000002195 synergetic effect Effects 0.000 claims description 15
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- 230000001699 photocatalysis Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 5
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- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 2
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
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- 229910052799 carbon Inorganic materials 0.000 description 2
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/40—Carbon monoxide
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Abstract
The invention relates to a system and a method for converting carbon dioxide by combining water-assisted plasma and a photocatalyst, belonging to CO 2 The technical field of comprehensive utilization. The invention provides a method for converting carbon dioxide by cooperation of water-assisted plasma and a photocatalyst, which comprises the following steps: CO is processed by 2 CO in gas collecting bottle 2 Flow rate regulation by gas flow meter, CO 2 Then enters the bubbler through the air inlet end of the bubbler, and the heating temperature of the bubbler and CO are introduced 2 CO-regulating the flow of water vapor, CO 2 The water vapor enters a plasma reaction device filled with a photocatalyst from the gas outlet end of the bubbler for reaction, the generated CO is collected by a gas receiving device, and meanwhile, the power of the plasma reaction device is regulated by a plasma power generator. The method introduces cheap water vapor into the high-energy plasma generated by electric energy and the environment-friendly photocatalyst to improve the conductivity of the surface of the photocatalyst, thereby CO is realized together 2 Efficient conversion to CO.
Description
Technical Field
The invention belongs to CO 2 The technical field of comprehensive utilization, and relates to a system and a method for converting carbon dioxide by cooperation of water-assisted plasma and a photocatalyst.
Background
The mass combustion of fossil fuels such as coal, petroleum and the like brings economic effect and simultaneously brings a large amount of CO 2 Is arranged in the air. In recent years, due to CO 2 The problems of rapid species reduction, sea level rise, global temperature rise and the like are increasingly prominent due to the large discharge of the water-soluble polymer, and are highly valued in countries around the world.
CO 2 Has extremely high thermal stability, only 1.8% of the catalyst is decomposed at 2000 ℃, so how to efficiently convert and utilize CO 2 Becomes a hot spot and a difficult point of current research. Fracture of CO 2 The energy required for the carbon-oxygen bond in the molecule is 5.5eV, while the average energy of the high-energy particles in the low-temperature plasma can reach 10eV, and the high-energy particles are enough to dissociate and activate CO under the conditions of room temperature and normal pressure 2 A molecule. Changing the stable state into unstable vibration excitation state, thereby promoting CO 2 Is transformed by the above method. The individual plasma conversion systems produce products with uncertainty and lower selectivity to the target product under different reaction conditions. To ensure the certainty of the target product, a photocatalyst absorbing renewable energy source-sunlight can be combined with a plasma conversion system to catalyze CO 2 CO or CH generation 4 Chemical products with equal high added value. Although it ensures CO 2 Conversion to high value added chemical products such as CO, but there is still much room for improvement in conversion efficiency. Therefore, in response to the national call, CO is minimized 2 The emission amount of the catalyst is very important to convert the catalyst into chemical products with high added value such as CO and the like as much as possible.
Disclosure of Invention
Accordingly, it is an object of the present invention to provide a system for converting carbon dioxide by combining a water-assisted plasma and a photocatalyst; the second object of the present invention is to provide a method for converting carbon dioxide by combining water-assisted plasma and a photocatalyst.
In order to achieve the above purpose, the present invention provides the following technical solutions:
1. a system for the synergistic conversion of carbon dioxide by water-assisted plasma and photocatalyst comprises a CO connected in sequence 2 The device comprises a gas collection bottle 1, a gas flowmeter 2, a bubbler 3, a plasma reaction device 4 and a gas receiving device 5, wherein the plasma reaction device 4 is also connected with a plasma power generator 6 and an oscilloscope 7 in sequence;
the air inlet end of the bubbler 3 is connected with the gas flowmeter 2, and the air outlet end is connected with the plasma reaction device 4.
Preferably, the plasma reaction device is a dielectric barrier discharge plasma reaction device.
Preferably, the power of the plasma power generator is set to be 50W or more.
2. A method for the synergistic conversion of carbon dioxide by a water-assisted plasma and a photocatalyst, the method being carried out using the system, the method comprising the steps of:
the flow rate of carbon dioxide in a carbon dioxide gas collecting bottle 1 is regulated through a gas flowmeter 2, the carbon dioxide enters a bubbler 3 through the gas inlet end of the bubbler 3, the bubbler 3 regulates the flow rate of water vapor, and then the carbon dioxide carries the water vapor to enter a plasma reaction device 4 filled with a photocatalyst from the gas outlet end of the bubbler 3, and plasma photocatalytic reaction is carried out to lead CO to 2 Converted into CO, the generated CO is collected by the gas receiving device 5, and the power of the plasma reaction device 4 is regulated by the plasma power generator 6.
Preferably, the calculation formula of the power in the power of the plasma power generator 6 for adjusting the plasma reaction device 4 is as follows: p=s×f×c,
wherein P is power, and the unit is W; s is the area of the integration of the voltage of the sampling capacitor to the external voltage in a period, and the unit is V 2 The method comprises the steps of carrying out a first treatment on the surface of the f is the discharge frequency in Hz; c is a sampling capacitor, and the unit is F;
the voltage and the discharge frequency are detected by an oscilloscope 7.
Preferably, the water vapor is prepared by a bubbling method.
Preferably, the flow rate of the carbon dioxide entering the bubbler 3 through the air inlet end of the bubbler 3 and the flow rate ratio of the regulated water vapor of the bubbler 3 are 20:1.13-50:2.18.
Preferably, the reaction duration of the plasma photocatalytic reaction is more than 10 min.
Preferably, the photocatalyst is a perovskite; the perovskite is Cs 2 SnCl 6 Perovskite.
Preferably, the photocatalyst is used in an amount of 5mg or more.
Further preferably, the photocatalyst is used in an amount of 10mg.
The invention has the beneficial effects that: the invention provides a system and a method for converting carbon dioxide by cooperation of water-assisted plasma and a photocatalyst. When CO 2 After being simultaneously introduced into a plasma reaction device filled with the photocatalyst together with water vapor, the water vapor can be adsorbed on the surface of the photocatalyst under the action of an external electric field to improve the surface conductivity of the photocatalyst, thereby being beneficial to increasing the transfer charge, the discharge charge and the peak-to-peak charge of discharge and promoting the occurrence probability of physicochemical reaction in an air gap. In addition, the water vapor can also increase the micro-discharge times and micro-discharge time. Thus, CO-conversion of CO in plasma with photocatalyst 2 On the basis of (a), introducing water vapor can further promote CO 2 Is a conversion rate of (a). The method introduces cheap water vapor into the high-energy plasma generated by electric energy and the environment-friendly photocatalyst to improve the conductivity of the surface of the photocatalyst, thereby CO is realized together 2 Efficient conversion to CO.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of CO-conversion of CO with a water-assisted plasma and a photocatalyst 2 Is a system of (2);
FIG. 2 shows the photocatalyst Cs observed under a scanning electron microscope 2 SnCl 6 Is a microstructure of the (c);
FIG. 3 is a CO-conversion of CO with a photocatalyst in example 2 using a water-assisted plasma 2 A systematic lissajous diagram;
FIG. 4 is a CO-conversion of CO with a plasma and a photocatalyst in comparative example 1 2 A systematic lissajous diagram;
FIG. 5 is a graph of the CO conversion by plasma alone in comparative example 3 2 A systematic lissajous diagram;
FIG. 6 is a CO-conversion of CO with a photocatalyst in example 2 using a water-assisted plasma 2 A voltage-current diagram of the time discharge;
FIG. 7 is a graph showing CO-conversion of CO with a plasma and a photocatalyst in comparative example 1 2 A voltage-current diagram of the time discharge;
FIG. 8 is a graph of CO conversion by plasma alone in comparative example 3 2 A voltage-current diagram of the time discharge;
wherein 1 is CO 2 A gas collecting bottle; 2 is a gas flowmeter; 3 is a bubbler; 4 is a plasma reaction device; 5 is a gas receiving device; 6 is a plasma power generator; 7 is an oscilloscope.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Example 1
CO using a system for CO-conversion of carbon dioxide with a water-assisted plasma and a photocatalyst (as shown in FIG. 1) 2 The specific method for transformation is as follows:
CO 2 CO in gas collecting bottle 2 The flow rate is regulated by a gas flowmeter, the gas enters the bubbler through the gas inlet end of the bubbler, the bubbler regulates the flow rate of water vapor, and CO is discharged from the bubbler 2 The flow rate of the carbon dioxide carried water vapor entering the bubbler from the gas outlet end of the bubbler and the flow rate ratio of the bubbler regulated water vapor are adjusted to be 50:2.18, and the carbon dioxide carries the water vapor to enter the photocatalyst Cs filled with 5mg from the gas outlet end of the bubbler 2 SnCl 6 In the dielectric barrier discharge plasma reaction device, the plasma photocatalytic reaction is carried out for 10min, the generated CO is collected by the gas receiving device, and meanwhile, the power of the plasma reaction device is regulated to be 60W by the plasma power generator.
Example 2
5mg of photocatalyst Cs in example 1 2 SnCl 6 Changing to 10mg of photocatalyst Cs 2 SnCl 6 The remaining steps were the same as in example 1.
Example 3
5mg of photocatalyst Cs in example 1 2 SnCl 6 15mg of photocatalyst Cs is replaced 2 SnCl 6 The remaining steps were the same as in example 1.
Example 4
The procedure was the same as in example 2 except that the plasma photocatalytic reaction in example 2 was changed from 10min to 40 min.
Example 5
The power of the plasma reaction apparatus in example 2 was set to 60W to 50W, and the rest of the procedure was the same as in example 2.
Example 6
CO in example 2 2 The flow rate of the water vapor entering the bubbler through the bubbler inlet port was adjusted to a flow rate ratio of 50:2.18 to 20:1.13, the remainder of the procedure is the same as in example 2.
Example 7
CO in example 2 2 The flow rate of the water vapor entering the bubbler through the gas inlet end of the bubbler was adjusted to 50:2.18 to 35:1.72 by the bubbler, and the rest of the procedure was the same as in example 2.
Comparative example 1
CO 2 CO in gas collecting bottle 2 The flow rate was adjusted to 50mL/min by a gas flow meter and charged with 10mg of photocatalyst Cs 2 SnCl 6 In the dielectric barrier discharge plasma reaction device, the plasma photocatalytic reaction is carried out for 10min, the generated CO is collected by the gas receiving device, and meanwhile, the power of the plasma reaction device is regulated to be 60W by the plasma power generator.
Comparative example 2
Photocatalyst Cs in comparative example 1 2 SnCl 6 Conversion to non-photocatalytic Al 2 O 3 The remaining steps were the same as in comparative example 1.
Comparative example 3
The photocatalyst in comparative example 1 was removed, and the rest of the procedure was the same as in comparative example 1.
Comparative example 4
10mg of photocatalyst Cs 2 SnCl 6 Adding into photocatalytic test equipment (Labsor-III, beijing Perf ect Light Technology Co.Ltd. China), introducing CO 2 And the air pressure is kept at 90kPa, and the light irradiation is carried out for 3 hours to reduce CO by photocatalysis 2 And (3) reacting.
Comparative example 5
10mg of non-photocatalyst Al 2 O 3 Adding into photocatalytic test equipment (Labsor-III, beijing Perf ect Light Technology Co.Ltd. China), introducing CO 2 And the air pressure is kept at 90kPa, and the light irradiation is carried out for 3 hours to reduce CO by photocatalysis 2 And (3) reacting.
The CO production per minute of example 1 and comparative examples 1 to 5 were subjected to comparative test in accordance with the following method.
Test calculation method of CO production per minute:
1. in photocatalysis: after 3h of illumination, the content of CO was detected by a gas chromatograph, and the yield was averaged to minute to obtain the rate of CO production.
2. In plasma photocatalysis: after the plasma discharge reaction is stabilized, collecting gas, and since no carbon is deposited in the plasma reactor, CO 2 All of the carbon in the reaction mixture exists as gas, the gas generated under each reaction condition is collected in the same time, and 100 mu L of the gas is collected and then injected into a gas chromatographic column to detect the gas components and the content. The amount of CO in 100 μl of gas was averaged over minutes to give the rate of CO formation.
The CO production per minute of examples 1 to 7 and comparative examples 1 to 5 were tested and compared, and the test results are shown in Table 1:
TABLE 1 CO production per minute under different catalytic conditions
As can be seen from Table 1, when power, reaction time and CO 2 And H is 2 When the flow ratio of O is fixed, only the dosage of the catalyst is changed, and when the dosage of the catalyst is 5mg, 10mg and 15mg respectively, the water auxiliary plasma and the photocatalyst are used for converting CO in a synergistic way 2 The amount of carbon monoxide converted per minute corresponds to 5.06X10 respectively 4 μmol、6.02×10 4 Mu mol and 5.84X10 4 Mu mol, it can be seen that the water-assisted plasma synergistically converts CO with the photocatalyst 2 The optimal amount of the catalyst is 10mg; only CO is changed when the power, the reaction time and the catalyst dosage are fixed 2 And H is 2 Flow ratio of O, when CO 2 And H is 2 When the flow ratio of O is 20:1.13, 35:1.72 and 50:2.18 respectively, the water auxiliary plasma and the photocatalyst are used for converting CO in a synergistic way 2 The amount of CO converted per minute corresponds to 7.56X10 respectively 4 μmol、6.64×10 4 Mu mol, and 6.02X10 4 Mu mol; when the reaction time, the catalyst amount and the CO 2 And H is 2 O is changed only when the flow ratio of O is constant, water assist is performed when the power is set to 50W and 60WCo-conversion of CO with ion bodies and photocatalysts 2 The amount of CO converted per minute was 5.78X10, respectively 4 And 6.02X10 4 The method comprises the steps of carrying out a first treatment on the surface of the When power, catalyst usage and CO 2 And H is 2 When the flow ratio of O is fixed, only the reaction time is changed, but when the reaction time is 10min and 40min, the water auxiliary plasma and the photocatalyst are used for converting CO in a synergistic way 2 The amount of CO converted per minute was 6.09X 10, respectively 4 And 6.02X10 4 . Power, reaction time, catalyst usage and CO 2 CO-conversion of CO with a water-assisted plasma and a photocatalyst corresponding to a different flow ratio of water vapor 2 The amount of CO converted was also different, thus indicating that the water-assisted plasma and the photocatalyst CO-converted CO 2 The reaction conditions of (2) have a crucial influence on the reaction. In addition, CO-conversion of CO with plasma and photocatalyst 2 The amount of CO converted per minute was 4X 10 4 Mu mol; co-conversion of CO by plasma and non-photocatalyst 2 The amount of CO converted per minute was 3.71X 10 4 Mu mol; plasma-independent CO conversion 2 The amount of CO converted per minute was 2.70X10 4 Mu mol; photocatalyst alone to convert CO 2 The amount of CO converted per minute was 13.14X10 -4 Mu mol; non-photocatalyst does not have photocatalytic reduction of CO 2 Is provided). CO-conversion of CO with plasma and photocatalyst 2 Compared with the catalyst, the catalyst has the advantages of 60W power, 10min reaction time, 10mg catalyst dosage and CO 2 And H is 2 Under the condition that the flow ratio of O is 50:2.18, the water auxiliary plasma and the photocatalyst are used for converting CO in a synergistic way 2 In the catalytic reaction of (2), the introduction of water vapor causes CO to be formed 2 The amount of carbon monoxide converted per minute is increased by 50.5%; CO-conversion of CO with plasma and non-photocatalyst 2 In contrast, the introduction of water vapor causes CO to be 2 The amount of CO converted per minute is increased by 62.26%; CO conversion with plasma alone 2 In contrast, the CO-conversion of CO by water-assisted plasma and photocatalyst 2 The amount of CO converted per minute is increased by 122.96%; photocatalyst alone to convert CO 2 In contrast, the CO-conversion of CO by water-assisted plasma and photocatalyst 2 The amount of CO converted per minute was 4.6X10 7 Multiple times. It can be seen that CO can be achieved by combining high-energy plasma generated by electric energy, an environmentally friendly photocatalyst, and inexpensive water vapor 2 Efficient conversion to CO.
For the prepared Cs 2 SnCl 6 The microstructure of the photocatalyst was subjected to scanning electron microscopy, and the result is shown in fig. 2. From FIG. 2, it can be seen that the Cs 2 SnCl 6 The photocatalyst has an irregular morphology.
CO conversion in example 2, comparative example 1 and comparative example 3, respectively 2 The energy efficiency of (2) was measured, and the experimental results are shown in fig. 3, 4 and 5, respectively. From the figure, the CO-conversion of CO by the water-assisted plasma and the photocatalyst is shown 2 System (FIG. 3), plasma and photocatalyst CO-conversion CO 2 System (FIG. 4), plasma-independent CO conversion 2 The peak-to-peak charge of the system (FIG. 5) was 532nC, 492nC, 420nC, respectively; the discharge charges were 276nC, 240nC, 220nC, respectively. Therefore, the introduction of the photocatalyst increases the peak-to-peak charge and the discharge charge, which is beneficial to the occurrence of physicochemical reaction in the discharge air gap; the introduction of water vapor further improves the peak-to-peak charge and the discharge charge of the reaction; thereby improving CO 2 Is improved in terms of conversion rate and energy efficiency.
The voltage and current during the plasma discharge reaction in example 2, comparative example 1 and comparative example 3 were measured, respectively, and the experimental results are shown in fig. 6, fig. 7 and fig. 8, respectively. As can be seen by comparing FIGS. 7 and 8, coupling the photocatalyst with the plasma converts CO 2 Conversion of CO by plasma alone 2 The method has more discharge times and stronger discharge intensity. This shows that the introduction of the photocatalyst can significantly increase the micro-discharge times, thereby increasing CO 2 Is a conversion rate of (a). As can be seen from comparing fig. 6 and 7, when water vapor is introduced into the photocatalyst-filled plasma reaction apparatus, it is clearly observed that the number and intensity of micro-discharge times in the negative half period of discharge are significantly superior to those in the case where water vapor is not introduced. Thus, CO-conversion of CO in plasma and photocatalysis 2 On the basis of (a), introducing water vapor can further promote CO 2 Transformation of (2)The rate.
In summary, the present invention provides a system and a method for converting carbon dioxide by combining a water-assisted plasma and a photocatalyst. Under the action of an external electric field, water vapor can be adsorbed on the surface of the photocatalyst to improve the surface conductivity of the photocatalyst, so that transfer charge, discharge charge and peak-to-peak charge in a plasma discharge reaction are increased, the occurrence probability of physicochemical reaction in an air gap is promoted, and the micro discharge frequency and the micro discharge time can be increased. CO-conversion of CO with plasma and photocatalyst 2 In contrast, the introduction of water vapor causes CO to be 2 The amount of converted CO per minute was increased by 50.5%. The method combines high-energy plasma generated by electric energy, environment-friendly photocatalyst and low-cost water vapor to realize CO 2 Efficient conversion to CO.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (10)
1. A system for the synergistic conversion of carbon dioxide by a water-assisted plasma and a photocatalyst, characterized in that: the system comprises the CO connected in turn 2 The device comprises a gas collection bottle (1), a gas flowmeter (2), a bubbler (3), a plasma reaction device (4) and a gas receiving device (5), wherein the plasma reaction device (4) is also connected with a plasma power generator (6) and an oscilloscope (7) in sequence;
the air inlet end of the bubbler (3) is connected with the gas flowmeter (2), and the air outlet end is connected with the plasma reaction device (4).
2. The system for the synergistic conversion of carbon dioxide by a water-assisted plasma and a photocatalyst of claim 1, wherein: the plasma reaction device (4) is a dielectric barrier discharge plasma reaction device.
3. The system for the synergistic conversion of carbon dioxide by a water-assisted plasma and a photocatalyst of claim 1, wherein: the power of the plasma power generator (6) is set to be more than 50W.
4. A method for converting carbon dioxide by combining water-assisted plasma and a photocatalyst, which is characterized by comprising the following steps: the method is carried out using the system of any one of claims 1 to 3, the method comprising the steps of:
CO is processed by 2 CO in gas collecting bottle (1) 2 The flow is regulated by a gas flowmeter (2), the gas enters the bubbler (3) through the gas inlet end of the bubbler (3), the bubbler (3) regulates the flow of water vapor, and then CO 2 Carrying water vapor from the air outlet end of the bubbler (3) into a plasma reaction device (4) filled with photocatalyst for performing plasma photocatalytic reaction to make CO 2 The CO is converted into CO, the generated CO is collected by a gas receiving device (5), and meanwhile, the power of a plasma reaction device (4) is regulated by a plasma power generator (6).
5. The method for the synergistic conversion of carbon dioxide by water-assisted plasma and photocatalyst according to claim 4, wherein: the calculation formula of the power in the power of the plasma power generator (6) adjusting plasma reaction device (4) is as follows: p=s×f×c,
wherein P is power, and the unit is W; s is the area of the integration of the voltage of the sampling capacitor to the external voltage in a period, and the unit is V 2 The method comprises the steps of carrying out a first treatment on the surface of the f is the discharge frequency in Hz; c is a sampling capacitor, and the unit is F;
the voltage and the discharge frequency are detected by an oscilloscope (7).
6. The method for the synergistic conversion of carbon dioxide by water-assisted plasma and photocatalyst according to claim 4, wherein: the water vapor is prepared by a bubbling method.
7. The method for the synergistic conversion of carbon dioxide by water-assisted plasma and photocatalyst according to claim 4, wherein: the CO 2 The flow ratio of the flow entering the bubbler (3) through the air inlet end of the bubbler (3) to the flow of the water vapor regulated by the bubbler (3) is 20:1.13-50:2.18.
8. The method for the synergistic conversion of carbon dioxide by water-assisted plasma and photocatalyst according to claim 4, wherein: the reaction time of the plasma photocatalytic reaction is more than 10 min.
9. The method for the synergistic conversion of carbon dioxide by water-assisted plasma and photocatalyst according to claim 4, wherein: the photocatalyst is perovskite; the perovskite is Cs 2 SnCl 6 Perovskite.
10. The method for the synergistic conversion of carbon dioxide by water-assisted plasma and photocatalyst according to claim 4, wherein: the dosage of the photocatalyst is more than 5 mg.
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| CN202211165938.XA CN115504469B (en) | 2022-09-23 | 2022-09-23 | System and method for cooperatively converting carbon dioxide by water-assisted plasma and photocatalyst |
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| CN202211165938.XA CN115504469B (en) | 2022-09-23 | 2022-09-23 | System and method for cooperatively converting carbon dioxide by water-assisted plasma and photocatalyst |
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| CN115504469B true CN115504469B (en) | 2024-02-27 |
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