Electric-field-assisted concentrated solar membrane reactor fuel preparation system

Abstract

Disclosed in the present invention are an electric-field-assisted concentrated solar thermochemical fuel preparation system and method. The system comprises: a concentrated solar collector, which is used for focusing and collecting solar energy and providing heat energy for the system; a membrane reactor, which has a reaction chamber, wherein a thermochemical membrane is arranged in the reaction chamber, and divides the reaction chamber of the membrane reactor into a reduction chamber and an oxidation chamber; and an electric-field assistance apparatus, which comprises a pair of electrodes respectively arranged on two sides of the thermochemical membrane. By introducing an electric field as a reaction driving force, the present invention decreases the reaction temperature and reduces the heat loss, and improves the utilization efficiency and stability of solar energy and the selectivity of reaction materials, thereby realizing efficient fuel preparation.

Description

An electric field-assisted concentrated solar membrane reactor fuel preparation system Technical Field

[0001] The present invention relates to the field of new energy technology, in particular to an electric field-assisted concentrated solar membrane reactor fuel preparation system. Background Art

[0002] In today's world, energy issues have become a global challenge. As a widespread and renewable energy source, solar energy is attracting increasing attention. Solar energy is primarily utilized in the form of photovoltaic and solar thermal energy. However, due to its dispersed and intermittent nature, direct solar energy utilization suffers from low energy flux density and poor efficiency, posing significant challenges in terms of capture and storage.

[0003] Converting solar energy into chemical energy for fuel provides an effective way to store, transport, and utilize solar energy on demand. Solar thermochemical technology is a highly promising energy storage technology that converts thermal energy into chemical energy. It utilizes the full solar spectrum, driving concentrated solar heat to decompose water (H2O) and carbon dioxide (CO2) at high temperatures to produce the corresponding clean fuels: hydrogen (H2) and carbon monoxide (CO).

[0004] Two-step thermochemical cycle fuel preparation and one-step thermochemical membrane reactor fuel preparation are two important solar fuel preparation technologies. Two-step thermochemical cycle fuel preparation involves partial reduction and deoxygenation of oxygen carriers (such as cerium oxide or doped cerium oxide materials, perovskites, or ferrites) at high temperatures (greater than 1673 K), followed by an oxidation reaction with H2O / CO2 at lower temperatures to produce H2 and CO, allowing intermittent production of fuel. One-step thermochemical membrane reactor fuel preparation involves redox reactions on both sides of a thermochemical membrane at steady-state high temperatures (approximately 1800 K), decomposing H2O / CO2 into separate H2 / CO and oxygen streams. The driving force of the thermochemical reaction is the high-temperature atmosphere and the different oxygen partial pressures on both sides of the membrane, allowing the continuous production of fuel gas.

[0005] However, these two technologies require demanding high reaction temperatures and low oxygen partial pressures. This, on the one hand, results in low H2O / CO2 decomposition efficiency and a low solar-to-fuel energy efficiency of less than 1%. Furthermore, they place extremely high demands on the mechanical properties of the membrane reaction materials. Therefore, the key to improving solar-to-fuel conversion efficiency is to lower the temperature of the thermochemical reaction while maintaining high fuel yields. Summary of the Invention

[0006] In order to address the deficiencies in the prior art, the present invention provides an electric field-assisted concentrated solar membrane reactor fuel preparation system and method. By introducing an electric field as the driving force of the reaction, the reaction temperature is lowered and heat loss is reduced, thereby improving the utilization efficiency and stability of solar energy and the selectivity of reaction materials, thereby achieving efficient fuel preparation.

[0007] To achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions:

[0008] An electric field-assisted concentrated solar thermal chemical fuel preparation system includes a concentrated solar collector, a membrane reactor and an electric field assist device;

[0009] The concentrating solar collector is used to focus and collect solar energy and provide thermal energy for the system;

[0010] The membrane reactor has a reaction chamber, in which a thermochemical membrane is arranged. The thermochemical membrane divides the reaction chamber of the membrane reactor into a reduction chamber and an oxidation chamber; the electric field assist device includes a pair of electrodes, which are respectively arranged on both sides of the thermochemical membrane. Voltage is applied to the electrodes to generate an electric field on both sides of the thermochemical membrane.

[0011] In one possible embodiment, an electric field-assisted concentrated solar thermal chemical fuel production system further includes a reduction-side heat exchanger and / or an oxidation-side heat exchanger;

[0012] The cold fluid outlet of the reduction side heat exchanger is communicated with the reduction chamber inlet of the membrane reactor, and the reduction chamber outlet of the membrane reactor is communicated with the hot fluid inlet of the reduction side heat exchanger;

[0013] The cold fluid outlet of the oxidation side heat exchanger is connected to the oxidation chamber inlet of the membrane reactor, and the oxidation chamber outlet of the membrane reactor is connected to the hot fluid inlet of the oxidation side heat exchanger. In one possible embodiment, an electric field-assisted concentrated solar thermal chemical fuel production system further includes an oxygen separation device, which is connected to the hot fluid outlet of the reduction side heat exchanger, and the mixed gas outlet end of the oxygen separation device is connected to the cold fluid inlet of the reduction side heat exchanger. An electric field-assisted concentrated solar thermal chemical fuel production system further includes an oxidation side cooler, and the inlet of the oxidation side cooler is connected to the hot fluid outlet of the oxidation side heat exchanger.

[0014] In one possible embodiment, an electric field-assisted concentrated solar thermochemical fuel preparation system further includes a gas-liquid separation device, the hot fluid outlet of the oxidation side heat exchanger or the outlet of the oxidation side cooler is connected to the gas-liquid separation device, and the liquid outlet of the gas-liquid separation device is connected to a liquid storage tank, and the liquid storage tank is connected to the cold fluid inlet of the oxidation side heat exchanger.

[0015] In a possible implementation, the thermochemical membrane is a metal oxide oxygen permeable membrane having a dense membrane structure made of one or more of cerium oxide, doped cerium-based materials, perovskite materials, and ferrite materials.

[0016] In one possible embodiment, an electric field-assisted concentrated solar thermal chemical fuel production method employing the above-mentioned system includes the following steps: collecting solar energy through a concentrated solar collector and converting it into thermal energy to provide thermal energy for the system;

[0017] generating an electric field on both sides of the thermochemical membrane of the membrane reactor by an electric field assist device to provide electrical energy for the system;

[0018] Under the action of an electric field-assisted device, the membrane reactor is used to decompose carbon dioxide to produce carbon monoxide, or decompose water to produce hydrogen.

[0019] In one possible embodiment, under the action of an electric field assist device, a membrane reactor is used to decompose water to produce hydrogen, or decompose carbon dioxide to produce carbon monoxide, including:

[0020] A mixed gas with low oxygen partial pressure is provided to the reduction chamber of the membrane reactor, and water or carbon dioxide is provided to the oxidation chamber of the membrane reactor, oxygen is generated in the reduction chamber, and hydrogen or carbon monoxide is generated in the oxidation chamber; the mixed gas with low oxygen partial pressure enters the cold fluid end of the reduction side heat exchanger for preheating; then enters the reduction chamber of the membrane reactor, and mixes with the oxygen generated in the reduction chamber to obtain a mixed gas with high oxygen partial pressure; the mixed gas with high oxygen partial pressure flows out of the reduction chamber outlet and enters the hot fluid end of the reduction side heat exchanger, and preheats the mixed gas with low oxygen partial pressure at the cold fluid end; then enters the oxygen separation device, and pure oxygen and mixed gas with low oxygen partial pressure are obtained by the oxygen separation device and enter gas tanks respectively, and the mixed gas with low oxygen partial pressure is provided as raw material to the reduction chamber of the membrane reactor for recycling;

[0021] Water or carbon dioxide enters the cold fluid end of the oxidation side heat exchanger for preheating; then enters the oxidation chamber of the membrane reactor, and under the action of the electric field, reacts with the thermochemical membrane to decompose water to produce hydrogen or decompose carbon dioxide to produce carbon monoxide; the high-temperature water vapor and hydrogen or carbon monoxide mixture in the oxidation chamber flows out from the oxidation chamber outlet and enters the hot fluid end of the oxidation side heat exchanger to preheat the water or carbon dioxide in the cold fluid end; then enters the gas-liquid separation device to obtain pure hydrogen and liquid water, which enter the corresponding gas tank and liquid storage tank respectively. The liquid water is re-supplied as raw material to the oxidation chamber of the membrane reactor for recycling.

[0022] Compared with the existing technology, the beneficial effects of the present invention are: 1. The present invention utilizes electric field assisted technology, which can achieve the decomposition of water or carbon dioxide at a relatively low temperature compared to a separate membrane reactor, avoiding the high temperature problem of a high-temperature membrane reactor, and can improve the reaction rate and efficiency, thereby improving the preparation efficiency of hydrogen and oxygen, reducing the reaction temperature, energy consumption and production costs, and improving the stability and controllability of the reaction, thereby reducing fluctuations and instability during the reaction. 2. The oxygen separation device at the tail of the reduction side heat exchanger of the present invention can obtain a nitrogen-oxygen mixed gas with a low oxygen partial pressure. The low oxygen partial pressure mixed gas can be reused as a raw material on the one hand, and on the other hand, it can also reduce the reaction temperature and improve efficiency. 3. The present invention utilizes solar energy as an energy source, which has the advantages of environmental protection and energy saving, and meets the requirements of sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of an existing membrane reactor.

[0024] FIG2 is a schematic diagram of the system structure of the present invention.

[0025] FIG3 is a schematic diagram of the membrane reactor of the present invention.

[0026] FIG4 is a graph showing the effect of current density change on the theoretical efficiency of solar energy to fuel at different temperatures.

[0027] FIG5 is a graph showing the theoretical efficiency of solar energy to fuel as a function of current density at different oxygen partial pressures.

[0028] The numbers shown in the accompanying drawings are: 1. Concentrating solar energy collector; 2. Membrane reactor; 3. Electric field assist device; 4. Reduction side heat exchanger; 5. Oxidation side heat exchanger; 6. Oxygen separation device. DETAILED DESCRIPTION

[0029] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0030] In the prior art, the principle of the thermochemical membrane reactor is shown in FIG1 . Concentrated solar energy provides a high temperature environment for the thermochemical membrane reactor. The reaction conditions are usually a high temperature of 1600°C (1873K) or above and an oxygen partial pressure of 10 -5 Atm, under high temperature and low oxygen partial pressure reaction conditions, oxygen is released from the lower side of the membrane (reduction chamber), while H2O / CO2 is adsorbed on the membrane surface on the other side (oxidation chamber), releasing H2 / CO, thus achieving continuous production of H2 / CO. However, at high temperatures above 1600℃ (1873K) and oxygen partial pressures of 10 -5 At temperatures below 300 nm, significant energy consumption is incurred, and according to literature, efficiency is less than 1%. Therefore, the present invention proposes an electric field-assisted concentrated solar thermochemical fuel production system and method, as shown in Figures 2 and 3. Introducing an electric field into the membrane reactor 2 can increase the ion migration rate of the oxygen-permeable membrane and provide a driving force for the chemical reaction, reducing the reaction temperature and the need for low oxygen partial pressure.

[0031] Referring to FIG1 , the present invention provides an electric field-assisted concentrated solar thermal chemical fuel production system, comprising a concentrated solar collector 1, a membrane reactor 2, and an electric field assist device 3. The concentrated solar collector 1 is used to focus and collect solar energy and convert it into thermal energy to provide thermal energy for the system. Specifically, the concentrated solar collector 1 can be a dish concentrator, a tower concentrator, or a lower tower concentrator. The thermal energy is transferred to the membrane reactor 2 via a heat exchanger, providing a high heat collection temperature for the membrane reactor 2, allowing water or carbon dioxide introduced into the membrane reactor 2 to react with the thermochemical membrane to generate hydrogen and oxygen or carbon monoxide and oxygen.

[0032] The membrane reactor 2 has a reaction chamber, in which a thermochemical membrane is arranged, and the thermochemical membrane divides the reaction chamber of the membrane reactor 2 into a reduction chamber and an oxidation chamber. The thermochemical membrane can be a metal oxide oxygen-permeable membrane, which isolates the reaction chamber of the membrane reactor 2 into two areas, one of which is a reduction chamber and the other is an oxidation chamber. The reduction chamber is purged with an inactive gas such as N2, Ar, He, etc. to promptly remove the generated oxygen and maintain a low oxygen partial pressure environment in the reduction chamber; water or carbon dioxide is introduced into the oxidation chamber, and the metal oxide oxygen-permeable membrane can not only undergo redox reactions with water or carbon dioxide, but also isolate the gas and pressure on both sides, while transmitting oxygen ions laterally. The electric field assist device 3 includes a pair of electrodes, which are respectively arranged on both sides of the thermochemical membrane. A voltage is applied to the electrodes to generate an electric field on both sides of the thermochemical membrane.

[0033] The present invention applies voltage to the electrodes to generate an electric field on both sides of the thermochemical membrane, thereby increasing the ion migration rate of the oxygen permeable membrane and providing a driving force for the chemical reaction, thereby reducing the reaction temperature and the requirement for low oxygen partial pressure.

[0034] Furthermore, an electric field-assisted concentrated solar thermal chemical fuel preparation system also includes a reduction side heat exchanger 4 and / or an oxidation side heat exchanger 5. The cold fluid outlet of the reduction side heat exchanger 4 is connected to the reduction chamber inlet of the membrane reactor 2, and the reduction chamber outlet of the membrane reactor 2 is connected to the hot fluid inlet of the reduction side heat exchanger 4. The cold fluid outlet of the oxidation side heat exchanger 5 is connected to the oxidation chamber inlet of the membrane reactor 2, and the oxidation chamber outlet of the membrane reactor 2 is connected to the hot fluid inlet of the oxidation side heat exchanger 5. In this embodiment, the reduction side heat exchanger 3 and the oxidation side heat exchanger 4 are respectively used to recover the heat of the gas flowing out of the reduction side and the oxidation side of the membrane reactor, and at the same time preheat the gas flowing into the reduction side and the oxidation side of the membrane reactor.

[0035] Furthermore, an electric field-assisted concentrated solar thermochemical fuel preparation system also includes an oxygen separation device 6, which is connected to the hot fluid outlet of the reduction side heat exchanger 4, and the mixed gas outlet end of the oxygen separation device 6 is connected to the cold fluid inlet of the reduction side heat exchanger 4.

[0036] In this embodiment, a mixed gas with a high oxygen partial pressure (e.g., a mixture of nitrogen and oxygen at a high oxygen partial pressure) flows out of the reduction chamber and enters the hot fluid end of the reduction-side heat exchanger 4, where it preheats the mixed gas with a low oxygen partial pressure at the cold fluid end. The mixed gas then enters the oxygen separation device 6, where it produces pure oxygen and a mixed gas with a low oxygen partial pressure (e.g., a mixture of nitrogen and oxygen at a low oxygen partial pressure). These gases enter gas tanks, respectively: oxygen enters the oxygen tank and the mixed gas enters the mixed gas tank. The mixed gas with a low oxygen partial pressure is then provided as raw material to the reduction chamber of the membrane reactor 2 for recycling. The oxygen separation device 6 implements in-situ oxygen separation technology to achieve low oxygen partial pressure reaction conditions, consuming less energy than direct oxygen separation from air. Furthermore, an electric field-assisted concentrated solar thermal chemical fuel production system further includes an oxidation-side cooler, the inlet of which is connected to the hot fluid outlet of the oxidation-side heat exchanger 5. In this embodiment, the oxidation-side cooler is used to further cool the gas exiting the oxidation-side heat exchanger.

[0037] Furthermore, an electric field-assisted concentrated solar thermochemical fuel preparation system also includes a gas-liquid separation device, the hot fluid outlet of the oxidation side heat exchanger 5 or the outlet of the oxidation side cooler is connected to the gas-liquid separation device, and the liquid outlet of the gas-liquid separation device is connected to a liquid storage tank, and the liquid storage tank is connected to the cold fluid inlet of the oxidation side heat exchanger 5.

[0038] In this embodiment, the high-temperature water vapor and hydrogen or carbon monoxide mixture in the oxidation chamber flows out from the oxidation chamber outlet and enters the hot fluid end of the oxidation side heat exchanger 5 to preheat the water or carbon dioxide in the cold fluid end; it can optionally enter the oxidation side cooler for cooling; or directly enter the gas-liquid separation device, and after gas-liquid separation, pure hydrogen and liquid water are obtained and enter the corresponding gas tank and liquid storage tank respectively, that is, hydrogen is stored in the hydrogen tank, and liquid water is stored in the water tank. The liquid water is re-provided as raw material to the oxidation chamber of the membrane reactor 2 for recycling, saving energy and reducing costs.

[0039] Furthermore, the thermochemical membrane is a metal oxide oxygen permeable membrane, and the metal oxide oxygen permeable membrane has a dense membrane structure made of one or more of cerium oxide, doped cerium-based materials, perovskite materials, and ferrite materials.

[0040] An electric field-assisted concentrated solar thermochemical fuel preparation method using the above-mentioned system includes the following steps: collecting solar energy through a concentrated solar collector 1 and converting it into thermal energy to provide thermal energy for the system; generating an electric field on both sides of the thermochemical membrane of the membrane reactor 2 through an electric field assisting device 3 to provide electrical energy for the system; under the action of the electric field assisting device 3, the membrane reactor 2 is used to decompose carbon dioxide to produce carbon monoxide, or decompose water to produce hydrogen.

[0041] Furthermore, under the action of the electric field assist device 3, the membrane reactor 2 is used to decompose water to produce hydrogen, or decompose carbon dioxide to produce carbon monoxide, including:

[0042] A mixed gas with a low oxygen partial pressure is provided to the reduction chamber of the membrane reactor 2, and water or carbon dioxide is provided to the oxidation chamber of the membrane reactor 2, oxygen is generated in the reduction chamber, and hydrogen or carbon monoxide is generated in the oxidation chamber;

[0043] The mixed gas with low oxygen partial pressure enters the cold fluid end of the reduction side heat exchanger 4 for preheating; then enters the reduction chamber of the membrane reactor 2 and mixes with the oxygen generated in the reduction chamber to obtain a mixed gas with high oxygen partial pressure; the mixed gas with high oxygen partial pressure flows out of the reduction chamber outlet and enters the hot fluid end of the reduction side heat exchanger 4 to preheat the mixed gas with low oxygen partial pressure at the cold fluid end; then enters the oxygen separation device 6, and the pure oxygen and the mixed gas with low oxygen partial pressure are obtained by the oxygen separation device 6 and enter the gas tanks respectively. The mixed gas with low oxygen partial pressure is provided as raw material to the reduction chamber of the membrane reactor 2 for recycling;

[0044] After water or carbon dioxide enters the cold fluid end of the oxidation side heat exchanger 5 for preheating; it enters the oxidation chamber of the membrane reactor 2, and under the action of the electric field, reacts with the thermochemical membrane to decompose water to produce hydrogen or decompose carbon dioxide to produce carbon monoxide; the high-temperature water vapor and hydrogen or carbon monoxide mixed gas in the oxidation chamber flows out from the oxidation chamber outlet and enters the hot fluid end of the oxidation side heat exchanger 5, preheating the water or carbon dioxide in the cold fluid end; it enters the gas-liquid separation device to obtain pure hydrogen and liquid water, which enter the corresponding gas tank and liquid storage tank respectively, and the liquid water is re-supplied as raw material to the oxidation chamber of the membrane reactor 2 for recycling.

[0045] Figures 4 and 5 show the theoretical efficiency of numerical simulations. Figure 4 shows the theoretical solar-to-fuel efficiency as a function of current density at different temperatures. Compared to the high temperature of 1600°C (1873K) required for membrane reactors, the introduction of an electric field lowers the system reaction temperature, achieving the highest solar-to-fuel efficiency at 1200°C (1473K).

[0046] Figure 5 is a graph showing the effect of current density changes on the theoretical efficiency of solar-to-fuel conversion at different oxygen partial pressures at a temperature of 1473 K. The method and system of the present invention also improves the efficiency of solar-to-fuel conversion by reducing the oxygen partial pressure.

Claims

1. An electric field assisted concentrated solar thermochemical fuel production system, characterized in that: including concentrated solar energy collectors, membrane reactors, and electric field assist devices; The concentrating solar collector is used to focus and collect solar energy and provide thermal energy for the system; The membrane reactor has a reaction chamber, in which a thermochemical membrane is arranged, and the thermochemical membrane divides the reaction chamber of the membrane reactor into a reduction chamber and an oxidation chamber; The electric field assist device includes a pair of electrodes, which are respectively arranged on both sides of the thermochemical membrane. Voltage is applied to the electrodes to generate an electric field on both sides of the thermochemical membrane.

2. The electric field assisted concentrated solar thermochemical fuel production system according to claim 1, characterized in that: It also includes a reduction side heat exchanger and / or an oxidation side heat exchanger; The cold fluid outlet of the reduction side heat exchanger is communicated with the reduction chamber inlet of the membrane reactor, and the reduction chamber outlet of the membrane reactor is communicated with the hot fluid inlet of the reduction side heat exchanger; The cold fluid outlet of the oxidation side heat exchanger is communicated with the oxidation chamber inlet of the membrane reactor, and the oxidation chamber outlet of the membrane reactor is communicated with the hot fluid inlet of the oxidation side heat exchanger.

3. The electric field assisted concentrated solar thermochemical fuel production system according to claim 2, characterized in that: It also includes an oxygen separation device, which is connected to the hot fluid outlet of the reduction side heat exchanger, and the mixed gas outlet end of the oxygen separation device is connected to the cold fluid inlet of the reduction side heat exchanger.

4. The electric field assisted concentrated solar thermochemical fuel production system according to claim 2, characterized in that: The invention also includes an oxidation side cooler, wherein the inlet of the oxidation side cooler is communicated with the hot fluid outlet of the oxidation side heat exchanger.

5. The electric field assisted concentrated solar thermochemical fuel production system according to claim 2 or 4, characterized in that: It also includes a gas-liquid separation device, the hot fluid outlet of the oxidation side heat exchanger or the outlet of the oxidation side cooler is connected to the gas-liquid separation device, the liquid outlet of the gas-liquid separation device is connected to a liquid storage tank, and the liquid storage tank is connected to the cold fluid inlet of the oxidation side heat exchanger.

6. The electric field assisted concentrated solar thermochemical fuel production system according to claim 1, characterized in that: The thermochemical membrane is a metal oxide oxygen permeable membrane, and the metal oxide oxygen permeable membrane has a dense membrane structure made of one or more of cerium oxide, doped cerium-based materials, perovskite materials, and ferrite materials.

7. An electric field-assisted concentrated solar thermochemical fuel production method, characterized in that: The system according to any one of claims 1 to 6 comprises the following steps: collecting solar energy through concentrated solar collectors and converting it into thermal energy to provide thermal energy for the system; generating an electric field on both sides of the thermochemical membrane of the membrane reactor by an electric field assist device to provide electrical energy for the system; Under the action of an electric field-assisted device, the membrane reactor is used to decompose carbon dioxide to produce carbon monoxide, or decompose water to produce hydrogen.

8. The electric field-assisted concentrated solar thermal chemical fuel production method according to claim 7, characterized in that: Under the action of an electric field-assisted device, a membrane reactor is used to decompose water to produce hydrogen, or decompose carbon dioxide to produce carbon monoxide, including: A mixed gas with low oxygen partial pressure is provided to the reduction chamber of the membrane reactor, and water or carbon dioxide is provided to the oxidation chamber of the membrane reactor, oxygen is generated in the reduction chamber, and hydrogen or carbon monoxide is generated in the oxidation chamber; The mixed gas with low oxygen partial pressure enters the cold fluid end of the reduction side heat exchanger for preheating; then enters the reduction chamber of the membrane reactor and mixes with the oxygen generated in the reduction chamber to obtain a mixed gas with high oxygen partial pressure; the mixed gas with high oxygen partial pressure flows out of the reduction chamber outlet and enters the hot fluid end of the reduction side heat exchanger to preheat the mixed gas with low oxygen partial pressure at the cold fluid end; then enters the oxygen separation device, and the pure oxygen and the mixed gas with low oxygen partial pressure are obtained by the oxygen separation device and enter the gas tanks respectively. The mixed gas with low oxygen partial pressure is provided as raw material to the reduction chamber of the membrane reactor for recycling; Water or carbon dioxide enters the cold fluid end of the oxidation side heat exchanger for preheating; then enters the oxidation chamber of the membrane reactor, and under the action of the electric field, reacts with the thermochemical membrane to decompose water to produce hydrogen or decompose carbon dioxide to produce carbon monoxide; the high-temperature water vapor and hydrogen or carbon monoxide mixture in the oxidation chamber flows out from the oxidation chamber outlet and enters the hot fluid end of the oxidation side heat exchanger to preheat the water or carbon dioxide in the cold fluid end; then enters the gas-liquid separation device to obtain pure hydrogen and liquid water, which enter the corresponding gas tank and liquid storage tank respectively. The liquid water is re-supplied as raw material to the oxidation chamber of the membrane reactor for recycling.

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