CN117684191A - Device and method for preparing multi-carbon compound by high-temperature electrolytic tank series membrane electrode reactor - Google Patents
Device and method for preparing multi-carbon compound by high-temperature electrolytic tank series membrane electrode reactor Download PDFInfo
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- 239000012528 membrane Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 60
- 238000000926 separation method Methods 0.000 claims description 58
- 239000000047 product Substances 0.000 claims description 53
- 239000007788 liquid Substances 0.000 claims description 36
- 239000003792 electrolyte Substances 0.000 claims description 30
- 239000003054 catalyst Substances 0.000 claims description 14
- 239000012263 liquid product Substances 0.000 claims description 13
- 238000010248 power generation Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 8
- 238000006722 reduction reaction Methods 0.000 claims description 6
- 239000003011 anion exchange membrane Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 239000012071 phase Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 44
- 238000006243 chemical reaction Methods 0.000 abstract description 37
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 22
- 239000001569 carbon dioxide Substances 0.000 abstract description 21
- 238000006555 catalytic reaction Methods 0.000 abstract description 3
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000010405 anode material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000005185 salting out Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 229910017770 Cu—Ag Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000009792 diffusion process Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention relates to the technical field of comprehensive application of energy, and provides a device and a method for preparing multi-carbon compounds by connecting a high-temperature electrolytic tank in series with a membrane electrode reactor, which are used for solving the problem of low yield of a reaction for generating multi-carbon products by carbon dioxide electrolysis catalysis in the prior art. The conversion rate of synthesizing the multi-carbon compound by using the device and taking carbon dioxide as raw materials is high.
Description
Technical Field
The invention relates to the technical field of comprehensive energy application, in particular to a device and a method for preparing multi-carbon compounds by a high-temperature electrolytic cell series membrane electrode reactor.
Background
With the adjustment of the national energy structure, the renewable energy duty ratio is gradually increased, but the renewable energy has the characteristics of intermittence and fluctuation, and contradicts the requirements of the power grid on stability and reliability. The carbon dioxide electrolysis by using renewable electric energy can reduce carbon emission and convert the electric energy into high-added-value chemicals for storage, so that the method is an important way for converting and utilizing renewable energy.
Most carbon dioxide electrolysis studies are currently on a laboratory scale and are mostly based on single cell studies, such as the document Cu-Ag Tandem Catalysts for High-Rate CO 2 Electrolysis toward Multicarbons and CO 2 electrolysis to multicarbon products in strong acid, which limits the applicability of electrolytic industrialization. And although the invention patent "carbon dioxide electrolytic cell and carbon dioxide electrolytic cell stack apparatus" and the invention patent "a cathode, electrolytic cell apparatus and method for electrocatalytically reducing carbon dioxide" as disclosed in publication number CN114395773a and publication number CN114807997a disclose the synthesis of carbon monoxide, formic acid, methanol, acetic acid and ethanol using carbon dioxide, carbon dioxide is liable to react with OH on the cathode surface for a multi-carbon product - Reaction to form HCO 3 - This reduces the conversion of the reaction, resulting in lower yields of multi-carbon products from the carbon dioxide electrolysis reaction. Meanwhile, metal cations in the anode solution are easy to shuttle to the cathode to combine with bicarbonate to separate out salt crystals under the action of an electric field, so that a salting-out effect is caused, the concentration and the utilization rate of reactants are reduced while the local pH value is changed, and the reaction is difficult to maintain good stability. There is therefore a need to design a device for electrocatalytic reactions of multi-carbon products to achieve higher yields and better stability.
Disclosure of Invention
The inventionFirstly, in order to solve the problem of lower yield of the reaction for generating the multi-carbon products by the electrolysis and catalysis of carbon dioxide in the prior art, the device for preparing the multi-carbon compounds by the high-temperature electrolytic tank series membrane electrode reactor is provided, and the device can realize CO 2 The conversion into the multi-carbon compound can greatly increase the yield of the multi-carbon compound and reduce the loss of raw materials. The invention also provides a method for preparing the multi-carbon compound by connecting the high-temperature electrolytic tank with the membrane electrode reactor in series, which has simple operation and high reaction speed.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a device for preparing multi-carbon compounds by connecting high-temperature electrolytic cells in series with membrane electrode reactor comprises an SOEC electrolytic cell and a membrane electrode reactor, wherein the SOEC electrolytic cell and CO 2 The gas source is connected, the cathode product outlet of the SOEC cell is connected with the gas separation device, the anode product outlet is connected with the oxygen storage tank, the outlet of the first gas separation device is connected with the SOEC cell and the membrane electrode reactor respectively, the membrane electrode reactor is also connected with the electrolyte storage tank and the gas-liquid separation device, the gas phase outlet of the gas-liquid separation device is connected with the second gas separation device, the liquid phase outlet is connected with the liquid separation device, the outlet of the second gas separation device is connected with the gas product storage tank and the membrane electrode reactor respectively, and the outlet of the liquid separation device is connected with the liquid product storage tank and the electrolyte storage tank respectively.
The invention realizes CO by connecting SOEC electrolytic tank (solid oxide electrolytic tank) and membrane electrode reactor in series 2 Is converted into multi-carbon compounds. The total reaction of the SOEC electrolytic tank is CO 2 →CO+1/2O 2 Wherein the reaction taking place at the cathode is as followsThe reaction taking place at the anode is +.>The SOEC electrolyzer decomposes carbon dioxide into carbon monoxide, and then the carbon monoxide is introduced into the membrane electrode reactor to synthesize multi-carbon compound through the following reaction,
2CO+8H + +8e - →C 2 H 4 +2H 2 O
2CO+8H++8e - →C 2 H 5 OH+2H 2 O
2CO+4H + +4e - →CH 3 COOH
in the process, the carbon dioxide is not in direct contact with the electrolyte, so that the carbon dioxide is prevented from easily contacting with OH on the surface of the cathode - Reaction to form HCO 3 - The raw material loss is reduced, and the yield of the multi-carbon compound is improved. And in the reaction process, unreacted CO2 in reactants in the SOEC electrolytic tank is separated by the first gas separation device and then enters the SOEC electrolytic tank again for reaction, and unreacted electrolyte and CO in the reactants treated by the membrane electrode reactor are recycled back to the membrane electrode reactor.
Preferably, the membrane electrode reactor comprises a plurality of membrane electrode unit cell reactors connected in series.
The use of the series connection of the membrane electrode single-cell reactors has the advantages of large reaction treatment capacity and low overall cost, and can improve the yield of reaction products.
Preferably, the membrane electrode single cell reactor is a continuous flow membrane electrode reactor, and comprises an anion exchange membrane, a cathode loaded with a cathode catalyst and an anode loaded with an anode catalyst.
The catalyst of the cathode or the anode can be directly supported on a diffusion layer taking carbon cloth or carbon paper and the like as a substrate through an ultrasonic spraying method, so as to participate in catalytic reaction.
Preferably, the cathode catalyst comprises Cu 2 O/Cu and CuAg alloys, the cathode catalyst comprising IrO 2 And Ru/C.
Preferably, the electrolytic cell of the SOEC electrolytic cell is a symmetrical double-cathode flat tube structure electrolytic cell.
The SOEC cell is an energy and substance conversion device with an all-solid structure, and a single SOEC cell mainly comprises three parts, namely a porous cathode material, a compact electrolyte layer and a porous anode material, which are distributed in a sandwich structure, and the SOEC cell containing the symmetrical double-cathode flat tube type structure cell has good high-temperature cycle performance and long-term stability.
Preferably, the SOEC cell is also connected to a source of hot air.
The hot air is dry, moisture-free, non-conductive, non-combustion, non-chemical corrosion, pollution-free, safe and reliable, so that the heating of the SOEC cell by using the hot air as a heat source can ensure that the heated space is heated quickly, and meanwhile, the temperature of the SOEC cell can be kept stable.
Preferably, the device further comprises a renewable energy power generation device, and the renewable energy power generation device is connected with the SOEC cell and the membrane electrode reactor.
The renewable energy power generation device comprises a photovoltaic power generation device, a wind power generation device and a hydroelectric power generation device, can supply power to part of devices of the system, and uses renewable energy to supply CO 2 The fuel is converted into fuel which is convenient to store, and the complementary and cooperative optimization of energy sources can be realized.
A method for preparing multi-carbon compounds by using a high-temperature electrolyzer connected in series with a membrane electrode reactor, the method comprising the following steps of:
s1, introducing CO into an SOEC (solid oxide electrolyte) electrolytic cell 2 Heating the SOEC cell and applying voltage to obtain CO 2 Reducing the product;
s2, separating CO 2 Delivering CO in the reduction product to a membrane electrode reactor to participate in the reduction reaction;
s3, collecting and separating the product synthesized by the membrane electrode reactor.
The method of the invention uses CO 2 And decomposing to obtain CO, and introducing the CO into a membrane electrode reactor for reaction to obtain the multi-carbon compound.
Preferably, the SOEC cell in S1 is heated to 600-1000 ℃.
Preferably, S2 is: o generated by anode of SOEC electrolytic cell 2 Delivering the CO generated by the cathode of the SOEC cell into a gas storage tank 2 Reduction of CO in the product and unreacted CO 2 Separation of unreacted CO 2 Delivering to a raw material inlet for circulation, and delivering the product CO to a membrane electrode reactor for preparing multi-carbon products by electrolysisRaw materials of the material, electrolyte in the membrane electrode reactor comprises KHCO 3 Solution of NaHCO 3 Solutions and KOH solutions;
the S3 is as follows: carrying out gas-liquid separation on a product synthesized by the membrane electrode reactor, further separating the separated gas by a gas separation device to obtain unreacted CO and a gas product, recycling the unreacted CO into the membrane electrode reactor, and conveying the gas product into a gas product storage tank; the liquid obtained by gas-liquid separation passes through a liquid separation device, the separated electrolyte circularly enters a membrane electrode reactor, and the separated liquid product enters a liquid product storage tank for storage.
The unreacted materials are recycled to the SOEC cell or the membrane electrode reactor for reaction, so that the conversion rate can be improved, and the loss can be reduced.
Therefore, the invention has the following beneficial effects:
(1) The invention realizes CO by connecting the solid oxide electrolytic tank and the membrane electrode reactor in series 2 Conversion to multi-carbon compounds, compared to direct CO electrolysis 2 The yield of the multi-carbon compound can be greatly increased and the loss of raw materials can be reduced;
(2) The invention realizes CO by using an electrochemical device driven by renewable energy sources 2 The carbon dioxide is converted into multi-carbon compounds, so that no extra carbon emission burden is caused to the system;
(3) The invention uses the solid oxide electrolytic tank to electrolyze CO 2 Converted into CO and used for producing multi-carbon products by a membrane electrode reactor, so that CO is avoided 2 React with electrolyte to generate a large amount of HCO 3 - Resulting in reduced activity while avoiding the decrease in activity from HCO 3 - Medium regenerated CO 2 Energy loss caused by the energy loss;
(4) The invention avoids the traditional CO by connecting the membrane electrode reactor of the solid oxide electrolytic tank in series 2 The salting-out phenomenon of the membrane electrode reactor improves the yield of the reaction.
Drawings
Fig. 1 is a schematic view of the apparatus of the present invention.
Wherein, 1: SOEC electrolyzer; 2: a membrane electrode reactor;3：CO 2 a gas source; 4: a first gas separation device; 5: an oxygen storage tank; 6: an electrolyte storage tank; 7: a gas-liquid separation device; 8: a second gas separation device; 9: a liquid separation device; 10: a gas product storage tank; 11: a liquid product storage tank; 12: a hot air source; 13: renewable energy power generation device.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
Example 1
An apparatus for preparing multi-carbon compounds by connecting high-temperature electrolytic cells in series with membrane electrode reactors, as shown in figure 1, comprises an SOEC electrolytic cell 1, a membrane electrode reactor 2 and a renewable energy power generation device 13 which are connected in series; the cathode material of the SOEC cell 1 is Pt-YSZ (YSZ is yttrium stabilized zirconia) and the electrolyte is 8%Y 2 O 3 Doped ZrO 2 The anode material is La 1-x Sr x MnO 3 Raw material inlet and CO of SOEC electrolytic tank 1 2 The gas source 3 is connected, a cathode product outlet and an anode product outlet of the SOEC cell 1 are respectively connected with the first gas separation device 4 and the oxygen storage tank 5, and the SOEC cell 1 is also connected with the hot air source 12; different product outlets of the first gas separation device 4 are respectively connected with a raw material inlet of the SOEC cell 1 and a raw material inlet of the membrane electrode reactor 2; the membrane electrode reactor 2 is 5 continuous flow type membrane electrode reactors connected in series, and the continuous flow type membrane electrode reactor comprises an anion exchange membrane, a cathode loaded with a cathode catalyst and an anode loaded with an anode catalyst, wherein the anion exchange membrane is a polymer membrane based on polyarylpiperidine, and the cathode catalyst is Cu 2 O/Cu; the anode catalyst is IrO 2 The electrolyte inlet of the membrane electrode reactor 2 is connected with the electrolyte storage tank 6, the product outlet is connected with the gas-liquid separation device 7, the liquid phase outlet of the gas-liquid separation device 7 is connected with the liquid separation device 9, the different product outlets of the liquid separation device 9 are respectively connected with the electrolyte inlet of the membrane electrode reactor 2 and the liquid product storage tank 11, the gas phase outlet of the gas-liquid separation device 7 is connected with the second gas separation device 8, and the different product outlets of the second gas separation device 8 are respectively connected with the membrane electrodeThe reactor 2 raw material inlet and the gas product storage tank 10 are connected; the renewable energy power generation device 13 is a photovoltaic power generation device and is connected with the SOEC cell 1 and the membrane electrode reactor 2 for power supply.
Example 2
A method for preparing multi-carbon compounds by using a high temperature electrolyzer series membrane electrode reactor, using the apparatus of example 1, the steps are as follows:
s1, heating the SOEC cell to 750 ℃ by a hot air storage tank, and high-concentration CO 2 Gas storage tank as CO 2 Continuously introducing CO into SOEC cell from air source 2 The gas is applied to the two ends of the SOEC cell to start electrochemical reaction by applying 1.05V potential;
s2, separating an electrolysis product of the SOEC cell by a first gas separation device to obtain CO, inputting the CO into a membrane electrode reactor, and unreacted CO 2 Separated by a first gas separation device and recycled to CO 2 The gas storage tank and reenters the SOEC cell for reaction;
s3, KHCO of 1mol/L is fed into an electrolyte storage tank 3 Introducing electrolyte into a membrane electrode reactor, introducing a product CO of an SOEC (solid oxide electrolyte) electrolytic cell, applying 15V potential to the anode and the cathode of the membrane electrode reactor to obtain a product, separating the product by a gas-liquid separation device, separating the separated liquid by the liquid separation device, conveying the obtained liquid product into a liquid product storage tank, and recycling the separated unreacted electrolyte to an electrolyte inlet of the membrane electrode reactor; and the gas separated by the gas-liquid separation device is separated by the second gas separation device, the obtained gas product is conveyed into a gas product storage tank for storage, and unreacted CO is recycled to a gas input port of the membrane electrode reactor.
Comparative example 1
A method for preparing multi-carbon compound by electrolyzing carbon dioxide uses a device without SOEC electrolytic tank 1 and a corresponding connecting device, the device for reaction is only a membrane electrode reactor 2, the membrane electrode reactor 2 has the structure that the embodiment 1 comprises 5 continuous flow membrane electrode reactors connected in series, the membrane electrode reactor 2 is connected with an electrolyte storage tank 6 and a gas-liquid separation device 7, and a liquid phase outlet and a liquid separation of the gas-liquid separation device 7The separation device 9 is connected, different product outlets of the liquid separation device 9 are respectively connected with an electrolyte inlet and a liquid product storage tank 11 of the membrane electrode reactor 2, a gas phase outlet of the gas-liquid separation device 7 is connected with the second gas separation device 8, different product outlets of the second gas separation device 8 are respectively connected with a raw material inlet and a gas product storage tank 10 of the membrane electrode reactor 2, and the raw material inlet of the membrane electrode reactor 2 is also connected with CO 2 The air source 3 is connected;
the preparation steps of the method are as follows:
s1, KHCO of 1mol/L is fed into an electrolyte storage tank 3 Electrolyte is introduced into the membrane electrode reactor and simultaneously high-purity CO is introduced 2 Applying 15V potential to the anode and the cathode of the membrane electrode reactor to obtain a product, separating the product by a gas-liquid separation device, separating the separated liquid by the liquid separation device, conveying the obtained liquid product into a liquid product storage tank, and recycling the separated unreacted electrolyte to an electrolyte inlet of the membrane electrode reactor; the gas separated by the gas-liquid separation device is separated by the second gas separation device, and the obtained gas product is conveyed into a gas product storage tank for storage, and unreacted CO is not reacted 2 And circulated back to the gas inlet of the membrane electrode reactor.
A gas concentration detector and a mass flowmeter were provided in the SOEC cell of example 2, respectively, before and after the cell, and the measured CO was used 2 Consumption and CO 2 The feed amount was calculated to obtain the first staged single pass conversion using the following formula: first stage single pass conversion (%) =100× (CO 2 consumption)/(CO 2 Feeding materials; and a gas concentration detector and a mass flowmeter are arranged before and after the reactor, the second-section single-pass conversion rate is calculated by the measured CO consumption and CO feeding amount, the second-section single-pass conversion rate (%) =100× (CO consumption)/(CO feeding), and the total single-pass conversion rate is obtained by multiplying the first-section single-pass conversion rate and the second-section single-pass conversion rate which are connected in series. The carbon dioxide single pass conversion in example 2 was 27%. This shows that the invention can prepare multi-carbon compound by taking carbon dioxide as raw material.
Comparative example 1 was similar to the prior art in that carbon dioxide electrolytic synthesis was performed using only a membrane electrode reactor. Likewise, the number of the cells to be processed,the gas concentration detector and the mass flowmeter are arranged before and after the membrane electrode reactor in the comparative example 1, and CO is calculated 2 Single pass conversion, CO 2 Single pass conversion (%) =100× (CO 2 consumption)/(CO 2 Feeding). The carbon dioxide single pass conversion in comparative example 1 is only 2% much lower than in example 2, indicating that the present invention significantly improves the yield of the carbon dioxide to multi-carbon compound reaction.
Claims (10)
1. The device for preparing the multi-carbon compound by connecting the high-temperature electrolytic tank in series with the membrane electrode reactor is characterized by comprising an SOEC electrolytic tank (1) and a membrane electrode reactor (2), wherein the SOEC electrolytic tank and CO 2 The gas source (3) is connected, the cathode product outlet of the SOEC electrolytic tank is connected with the first gas separation device (4), the anode product outlet is connected with the oxygen storage tank (5), the gas separation device outlet is respectively connected with the SOEC electrolytic tank and the membrane electrode reactor, the membrane electrode reactor is also connected with the electrolyte storage tank (6) and the gas-liquid separation device (7), the gas phase outlet of the gas-liquid separation device is connected with the second gas separation device (8), the liquid phase outlet is connected with the liquid separation device (9), the outlet of the second gas separation device is respectively connected with the gas product storage tank (10) and the membrane electrode reactor, and the outlet of the liquid separation device is respectively connected with the liquid product storage tank (11) and the electrolyte storage tank.
2. The apparatus for preparing multi-carbon compounds using a high temperature electrolyzer in series with a membrane electrode reactor as recited in claim 1, characterized in that the membrane electrode reactor comprises a plurality of membrane electrode unit cell reactors connected in series.
3. The apparatus for preparing multi-carbon compounds by using the high-temperature electrolytic cell series membrane electrode reactor as claimed in claim 2, wherein the membrane electrode single cell reactor is a continuous flow membrane electrode reactor and comprises an anion exchange membrane, a cathode loaded with a cathode catalyst and an anode loaded with an anode catalyst.
4. A device for preparing multi-carbon compounds by high temperature electrolytic cell series membrane electrode reactor according to claim 3, characterized in that said cathode catalyst comprises Cu 2 O/Cu and CuAg alloys, the cathode catalyst comprising IrO 2 And Ru/C.
5. The device for preparing multi-carbon compounds by using the high-temperature electrolytic cell series membrane electrode reactor as claimed in claim 1, wherein the electrolytic cell of the SOEC electrolytic cell is a symmetric double-cathode flat tube type electrolytic cell.
6. The apparatus for preparing multi-carbon compounds in a high temperature electrolyzer series membrane electrode reactor according to claim 1, characterized in that the SOEC electrolyzer is also connected to a hot air source (12).
7. Device for the preparation of multi-carbon compounds in a high temperature electrolyzer series membrane electrode reactor according to claim 1 or 2, characterized in that it further comprises a renewable energy power generation device (13) connected to the SOEC electrolyzer and to the membrane electrode reactor.
8. A method for preparing a multi-carbon compound by a high temperature electrolyzer series membrane electrode reactor, characterized in that the method uses the apparatus as claimed in any one of claims 1 to 7, comprising the steps of:
s1, introducing CO into an SOEC (solid oxide electrolyte) electrolytic cell 2 Heating the SOEC cell and applying voltage to obtain CO 2 Reducing the product;
s2, separating CO 2 Delivering CO in the reduction product to a membrane electrode reactor to participate in the reduction reaction;
s3, collecting and separating the product synthesized by the membrane electrode reactor.
9. The method for preparing multi-carbon compounds by using a high-temperature electrolyzer-tandem membrane electrode reactor according to claim 1, wherein the SOEC electrolyzer in S1 is heatedTo 600-1000 o C。
10. A method for preparing a multi-carbon compound by a high-temperature electrolytic cell series membrane electrode reactor according to claim 1, wherein,
the S2 is as follows: o generated by anode of SOEC electrolytic cell 2 Delivering the CO generated by the cathode of the SOEC cell into a gas storage tank 2 Reduction of CO in the product and unreacted CO 2 Separation of unreacted CO 2 Delivering to a raw material inlet for circulation, delivering the product CO to a membrane electrode reactor as raw material for preparing multi-carbon products by electrolysis, wherein electrolyte in the membrane electrode reactor comprises KHCO 3 Solution of NaHCO 3 Solutions and KOH solutions;
the S3 is as follows: carrying out gas-liquid separation on a product synthesized by the membrane electrode reactor, further separating the separated gas by a gas separation device to obtain unreacted CO and a gas product, recycling the unreacted CO into the membrane electrode reactor, and conveying the gas product into a gas product storage tank; the liquid obtained by gas-liquid separation passes through a liquid separation device, the separated electrolyte circularly enters a membrane electrode reactor, and the separated liquid product enters a liquid product storage tank for storage.
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| CN202310873411.0A CN117684191A (en) | 2023-07-17 | 2023-07-17 | Device and method for preparing multi-carbon compound by high-temperature electrolytic tank series membrane electrode reactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310873411.0A CN117684191A (en) | 2023-07-17 | 2023-07-17 | Device and method for preparing multi-carbon compound by high-temperature electrolytic tank series membrane electrode reactor |
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| CN117684191A true CN117684191A (en) | 2024-03-12 |
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