A solar water splitting hydrogen production system coupled with solar thermal power generation

Abstract

The present invention provides a solar water splitting hydrogen production system coupled with photothermal power generation, belonging to the field of renewable energy utilization. The system includes a catalyst oxygen vacancy generation unit (catalyst deoxygenation unit) and a water splitting hydrogen production unit (hydrogen production unit) based on an oxygen vacancy catalyst. The catalyst deoxygenation unit is connected to the hydrogen production unit; the deoxygenation unit is used to generate photo-induced oxygen vacancies in the catalyst under short-wavelength sunlight and feed them into the hydrogen production unit; the hydrogen production unit includes a thermal reaction component and a first auxiliary component. The thermal reaction component is arranged below the catalyst deoxygenation unit and is respectively connected to the catalyst deoxygenation unit and the first auxiliary component. The thermal reaction component is used to collect long-wavelength sunlight to heat water vapor, decompose water under the action of the oxygen vacancy catalyst to produce hydrogen, and feed it into the first auxiliary component; the first auxiliary component is connected to the deoxygenation unit to separate the hydrogen and return the catalyst to the deoxygenation unit for circulation. The present invention realizes the co-production of green electricity and green hydrogen using full-band solar energy.

Description

Technical Field

[0001] The present invention belongs to the field of renewable energy utilization, and more specifically, relates to a solar water decomposition hydrogen production system coupled with photothermal power generation. Background Art

[0002] Solar thermal power generation utilizes large-scale arrays of parabolic or dish-shaped mirrors to collect solar thermal energy, which is then converted into steam through heat exchange devices. This technology, combined with traditional steam turbine generator technology, generates electricity. This not only avoids the expensive silicon-based photovoltaic conversion process, reducing the cost of solar power generation, but also stores the heat energy from solar-heated water vapor in a large thermal storage medium, allowing it to continue to generate steam turbine power for hours after sunset. This makes it ideal for large-scale deployment.

[0003] However, due to the low energy density of solar energy itself, and the fact that solar thermal power generation unit mainly utilizes the thermal effect of sunlight, the thermal effect is generated by the visible light band (400nm~750nm) and infrared band (>750nm) in sunlight, and the short-wave band (<400nm) in sunlight is not effectively utilized, and there is a problem of wasted light. CN114892180A discloses a photovoltaic-thermal-driven thermochemical and electrolytic coupled hydrogen production system and method, wherein short-wavelength light is injected into photovoltaic cells for photovoltaic power generation and drives high-temperature electrolysis to produce hydrogen, and long-wavelength light is injected into a two-step thermochemical reactor for high-temperature thermochemical hydrolysis to produce hydrogen. Although this method utilizes the short-wavelength and long-wavelength bands of solar energy, it is photovoltaic power generation rather than photothermal power generation technology. In addition, the two-step thermochemical hydrogen production adopted requires the generation of thermally induced oxygen vacancies under high temperature conditions, which may lead to high-temperature sintering of hydrogen production catalysts, greatly increasing the cost of hydrogen production. Summary of the Invention

[0004] In response to the defects of the existing technology, the purpose of the present invention is to provide a solar water decomposition hydrogen production system coupled with solar thermal power generation, aiming to solve the problems that the existing solar thermal power generation cannot utilize the ultraviolet band and the two-step thermochemical hydrogen production cost is relatively high.

[0005] To achieve the above objectives, the present invention provides a solar water splitting hydrogen production system coupled with photothermal power generation, the system comprising a catalyst deoxygenation unit and a hydrogen production unit, the catalyst deoxygenation unit being connected to the hydrogen production unit and having a hydrogen production catalyst disposed therein, for generating photo-induced oxygen vacancies in the hydrogen production catalyst under irradiation with short-wavelength sunlight below 400 nm and feeding the vacancies into the hydrogen production unit; the hydrogen production unit comprising a thermal reaction component and a first auxiliary component, the thermal reaction component being disposed below the catalyst deoxygenation unit and being connected to the catalyst deoxygenation unit and the first auxiliary component, respectively, for collecting long-wavelength sunlight above 400 nm to heat water vapor, the water vapor being decomposed under the action of the hydrogen production catalyst having photo-induced oxygen vacancies to generate hydrogen and feeding the hydrogen production catalyst into the first auxiliary component; the first auxiliary component being connected to the catalyst deoxygenation unit, for separating the hydrogen and feeding the hydrogen production catalyst back to the catalyst deoxygenation unit for circulation.

[0006] As a further preference, the solar water splitting hydrogen production system coupled with solar thermal power generation also includes a solar thermal power generation unit, which includes a collector array and a steam turbine. The collector array is arranged below the catalyst deoxidation unit and is used to collect the long-wavelength sunlight to heat water into water vapor and send it into the steam turbine; the steam turbine is used to utilize the water vapor to generate electricity to realize solar thermal utilization.

[0007] As a further preference, the water decomposition hydrogen production system also includes a heat exchanger arranged between the hydrogen production unit and the solar thermal power generation unit, and the heat exchanger is used to exchange heat between the water vapor sent into the hydrogen production unit and the extraction steam of the turbine, thereby realizing efficient utilization of thermal energy.

[0008] As a further preference, the first auxiliary component includes a first separator, a hydrogen storage tank and a first mixer, wherein one end of the first separator is connected to the outlet of the thermal reaction component, and the other end thereof is respectively connected to the hydrogen storage tank, the heat exchanger and the first mixer; a cyclone separator is provided at the inlet of the first separator, and a hydrogen separation membrane is provided inside the cyclone separator, which is used to perform gas-solid separation and hydrogen filtration on the mixed gas fed into the thermal reaction component, and then feed the hydrogen, water vapor and hydrogen production catalyst into the hydrogen storage tank, the heat exchanger and the first mixer respectively; the first mixer is connected to the inlet of the catalyst deoxygenation unit, and is used to mix the hydrogen production catalyst with the circulating water and feed them into the catalyst deoxygenation unit.

[0009] As a further preferred embodiment, the catalyst deoxygenation unit includes a photoreaction component and a second auxiliary component, wherein a hydrogen production catalyst is arranged inside the photoreaction component to generate photooxygen vacancies under the excitation of short-wavelength sunlight below 400 nm; the second auxiliary component includes a second separator and a second mixer, one end of the second separator is connected to the outlet of the photoreaction component, and the other end thereof is connected to the second mixer and the first mixer respectively, for separating the hydrogen production catalyst with photooxygen vacancies from the circulating water and feeding them into the second mixer and the first mixer respectively; one end of the second mixer is connected to the second separator and the heat exchanger, and the other end thereof is connected to the inlet of the thermal reaction component, for mixing the hydrogen production catalyst with photooxygen vacancies with the water vapor after heat exchange and feeding them into the thermal reaction component.

[0010] As a further preferred embodiment, the photoreaction component includes a feed port, a blunt-body spoiler and a photoreaction channel, the feed port is connected to the photoreaction channel, and is used to feed circulating water containing a hydrogen-producing catalyst into the photoreaction channel; the blunt-body spoiler is arranged inside the photoreaction channel and at the entrance of the photoreaction channel, and is used to generate turbulence so that the hydrogen-producing catalyst is evenly dispersed in the circulating water; the photoreaction channel is made of glass, and its outlet is connected to the thermal reaction component, and is used to enable the hydrogen-producing catalyst to generate photo-induced oxygen vacancies under the irradiation of short-wavelength sunlight and feed them into the thermal reaction component.

[0011] As a further preferred embodiment, the bottom of the light reaction channel is coated to transmit long-wavelength sunlight above 400 nm.

[0012] As a further preference, the coating process is to sequentially coat TiN, ZnO and SiO2 on the outer side of the glass from the inside to the outside.

[0013] As a further preference, the shape of the blunt body spoiler is triangular.

[0014] As a further preference, the hydrogen production catalyst is CeO2 and / or TiO2, and the particle size of the hydrogen production catalyst is 5 nm to 50 nm.

[0015] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0016] 1. By installing a catalyst deoxygenation unit above the thermal reaction assembly, the present invention can, on the one hand, utilize short-wavelength sunlight to irradiate the hydrogen production catalyst at room temperature to generate photo-induced oxygen vacancies, eliminating the need for a high-temperature environment and effectively reducing the production cost of hydrogen production. On the other hand, it can transmit long-wavelength sunlight to the thermal reaction assembly, thereby heating water vapor to achieve the reaction conditions for hydrogen production. Water vapor is then further decomposed into hydrogen by the hydrogen production catalyst with photo-induced oxygen vacancies, thereby achieving full-band utilization of solar energy to produce green hydrogen.

[0017] 2. In particular, the present invention can be coupled with a solar thermal power generation unit, placing a collector array below the catalyst deoxidation unit to further improve solar energy utilization efficiency. Simultaneously, by connecting a steam turbine to a heat exchanger, the waste heat of water vapor in the thermal reaction assembly can be used to heat the steam extracted from the steam turbine to generate reheat steam, thereby achieving efficient utilization of thermal energy.

[0018] 3. In addition, the present invention optimizes the material and structure of the catalyst deoxygenation unit. By coating it, it can transmit long-wave sunlight and reflect short-wave sunlight, thereby improving the utilization efficiency of short-wave sunlight. At the same time, by providing a blunt-body spoiler in the photoreaction channel, the dispersion of the hydrogen production catalyst can be improved, avoiding problems such as sedimentation and agglomeration of the hydrogen production catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of a solar water splitting hydrogen production system coupled with solar thermal power generation provided by an embodiment of the present invention;

[0020] Figure 2 This is a process flow chart of a solar water splitting hydrogen production system coupled with solar thermal power generation provided by an embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the structure of the light reaction assembly provided by an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the coating process in the photoreaction channel provided by an embodiment of the present invention, wherein (a) is the specific structure of the coating and (b) is the coating principle.

[0023] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0024] 1-steam turbine, 2-thermal reaction component, 3-photoreaction component, 4-first mixer, 5-heat exchanger, 6-second separator, 7-second mixer, 8-first separator, 9-hydrogen storage tank, 10-collector array, 11-catalyst deoxidation unit, 12-hydrogen production unit, 13-solar thermal power generation unit, 14-feeding port, 15-photoreaction channel. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] like Figure 1 、 2As shown, the present invention provides a solar water splitting hydrogen production system coupled with photothermal power generation, the system comprising a catalyst deoxidation unit 11 and a hydrogen production unit 12, wherein:

[0027] The catalyst deoxygenation unit 11 is connected to the hydrogen production unit 12, and a hydrogen production catalyst is provided inside the catalyst for generating photo-induced oxygen vacancies under the irradiation of short-wavelength sunlight (UV) below 400nm and feeding the photo-induced oxygen vacancies into the hydrogen production unit 12;

[0028] The hydrogen production unit 12 includes a thermal reaction component 2 and a first auxiliary component. The thermal reaction component is arranged below the catalyst deoxygenation unit 11, and includes a reflector and a collector. The reflector is used to collect long-wavelength sunlight above 400nm and heat the water vapor in the collector to reach the temperature conditions for hydrogen production. At the same time, the water vapor decomposes under the action of the hydrogen production catalyst with photo-oxidation vacancies to produce hydrogen and send it to the first auxiliary component; the first auxiliary component is connected to the catalyst deoxygenation unit 11, and is used to separate the hydrogen and return the hydrogen production catalyst to the catalyst deoxygenation unit for circulation.

[0029] The solar water splitting hydrogen production system coupled with photothermal power generation provided by the present invention directly uses solar energy to produce hydrogen, and can convert unstable solar energy into hydrogen for storage and use, thereby solving the problem of abandoned light caused by the instability of solar energy. At the same time, on the one hand, the system can utilize short-wavelength sunlight to irradiate the hydrogen production catalyst under normal temperature to produce photo-induced oxygen vacancies, without the need for a high-temperature environment, effectively reducing the production cost of hydrogen production. On the other hand, it can transmit long-wavelength sunlight to the thermal reaction component 2, and then heat the water vapor to reach the temperature condition for hydrogen production, without the need to introduce energy from the outside, thus achieving a completely green hydrogen production method, and being able to achieve full-band utilization of solar energy, effectively improving the utilization rate of solar energy. At the same time, a catalyst deoxidation unit 11 is set up above the thermal reaction component 2, which can reduce air convection in the thermal reaction component 2 area, thereby reducing heat dissipation. At the same time, the catalyst deoxidation unit 11 also has a certain dustproof effect, which is convenient for later maintenance.

[0030] In the present invention, the reaction equation of the hydrogen production catalyst is as follows:

[0031]

[0032] M x O y-δ +δH2O→M x O y +δH2(thermochemistry) (2)

[0033] Reaction (1) is carried out in the catalyst deoxidation unit 11, and reaction (2) is carried out in the thermal reaction component 2. Reaction (2) can achieve a high thermal efficiency at 400°C to 700°C.

[0034] Furthermore, the solar water splitting hydrogen production system coupled with solar thermal power generation also includes a solar thermal power generation unit 13. The solar thermal power generation unit 13 includes a collector array 10 and a steam turbine 1. The collector array 10 is located below the catalyst deoxidation unit 11 and is used to collect long-wavelength sunlight to heat water into steam and feed it into the steam turbine 1. The steam turbine 1 is used to generate electricity using the steam, thereby realizing solar thermal utilization. At the same time, the hydrogen production unit 12 also includes a heat exchanger 5 located between the thermal reaction assembly and the solar thermal power generation unit 13. The heat exchanger 5 is used to exchange heat between the steam fed into the hydrogen production unit 12 and the extracted steam from the steam turbine 1, thereby realizing efficient utilization of thermal energy.

[0035] Furthermore, the first auxiliary component includes a first separator 8, a hydrogen storage tank 9 and a first mixer 4, wherein one end of the first separator 8 is connected to the outlet of the thermal reaction component 2, and the other end thereof is respectively connected to the hydrogen storage tank 9, the heat exchanger 5 and the first mixer 4. The inlet of the first separator 8 is provided with a cyclone separator and a screen, and a hydrogen separation membrane is provided inside the first separator 8. During operation, gas-solid separation is performed through the cyclone separator and the screen, and the hydrogen production catalyst is separated and sent back to the first mixer 4 for circulation. The gas phase component is a mixed gas of hydrogen and water vapor, which is separated by the hydrogen separation membrane, and the hydrogen and water vapor are respectively sent to the hydrogen storage tank 9 and the heat exchanger 5; the first mixer 4 is connected to the inlet of the catalyst deoxygenation unit 11, and is used to mix the hydrogen production catalyst with the circulating water and send them to the catalyst deoxygenation unit 11.

[0036] The catalyst deoxygenation unit 11 includes a photoreaction component 3 and a second auxiliary component. The inlet of the photoreaction component 3 is connected to the first mixer 4, which is used to excite the hydrogen production catalyst fed in by short-wavelength sunlight to generate photo-oxygen vacancies; the second auxiliary component includes a second separator 6 and a second mixer 7, one end of the second separator 6 is connected to the outlet of the photoreaction component 3, and the other end thereof is connected to the second mixer 7 and the first mixer 4 respectively, which is used to separate the hydrogen production catalyst with photo-oxygen vacancies from the circulating water and feed them into the second mixer 7 and the first mixer 4 respectively; one end of the second mixer 7 is connected to the second separator 6 and the heat exchanger 5, and the other end thereof is connected to the inlet of the thermal reaction component 2, which is used to mix the hydrogen production catalyst with photo-oxygen vacancies with the water vapor after heat exchange and feed them into the thermal reaction component 2.

[0037] Further, if Figure 3 As shown, the photoreaction assembly 3 includes a feed port 14, a blunt body spoiler and a photoreaction channel 15. The feed port 14 is connected to the photoreaction channel 15 and is used to feed circulating water containing a hydrogen production catalyst into the photoreaction channel 15.

[0038] The blunt body spoiler is disposed inside the light reaction channel 15 and at the entrance of the light reaction channel 15 to generate turbulence so that the hydrogen production catalyst is evenly dispersed in the circulating water. The shape of the blunt body spoiler is preferably triangular, which can make the hydrogen production catalyst more evenly distributed after a short period of aggregation, and has the best effect on the light reaction.

[0039] The photoreaction channel 15 is made of glass, and its outlet is connected to the thermal reaction component 2 through the second separator 6 and the second mixer 7. It is used to enable the hydrogen production catalyst to generate photo-induced oxygen vacancies under the irradiation of short-wavelength sunlight and send them into the thermal reaction component 2. The photoreaction channel 15 is divided into three areas: a mixing area, a flow zone and a laminar reaction area. The mixing area is located between the feeding port and the blunt body spoiler. The flow zone is the area where the blunt body spoiler is located. The laminar reaction area is the area behind the blunt body spoiler where the water-cerium oxide suspension flows stably and undergoes photoreaction.

[0040] Furthermore, considering that although the absorption rate of the hydrogen production catalyst for short-wavelength sunlight irradiated to the surface can reach 90%, some short-wavelength sunlight will still pass through between the particles, a coating treatment can be performed on the bottom of the light reaction channel to only transmit long-wavelength sunlight above 400nm and reflect short-wavelength sunlight within 400nm back to the light reaction channel, such as Figure 4 As shown in (b). The specific coating structure is as follows Figure 4 As shown in (a), TiN, ZnO and SiO2 are plated on the outside of the glass from the inside to the outside.

[0041] Furthermore, the hydrogen production catalyst preferably uses CeO2 and / or TiO2, and the particle size of the hydrogen production catalyst is 5nm to 50nm. To improve the reaction in the photochemical stage, the hydrogen production catalyst can be doped with transition metals or precious metals to increase its absorption capacity in the ultraviolet band and improve the hydrogen yield.

[0042] The following is a detailed description of the working process of the solar water splitting hydrogen production system coupled with photothermal power generation provided by the present invention. Driven by circulating water, the hydrogen production catalyst enters the photoreaction channel through the feed port and generates photooxygen vacancies under the irradiation of short-wavelength sunlight. After separation by the second separator 6, the hydrogen production catalyst with photooxygen vacancies is mixed with the water vapor after heat exchange in the second mixer 7 and fed into the thermal reaction component 2. At the same time, the circulating water is fed into the first mixer 4 to drive the hydrogen production catalyst into the photoreaction channel; the thermal reaction component 2 collects long-wavelength sunlight to heat the water vapor to make it reach the reaction conditions. At the same time, the water vapor is under the action of the hydrogen production catalyst with photooxygen vacancies. Decomposition produces hydrogen; the thermal reaction component 2 sends the mixed gas produced by the reaction into the first separator 8, firstly performs gas-solid separation under the action of the cyclone separator, and sends the separated hydrogen production catalyst into the first mixer 4 for circulation. The separated gas is filtered through the hydrogen separation membrane to obtain hydrogen and water vapor, which are respectively sent to the hydrogen storage tank 9 and the heat exchanger 5; the water vapor exchanges heat with the exhaust gas of the turbine 1 in the heat exchanger 5 to heat it into reheat steam and then sends it back to the turbine 1 to do work. At the same time, the water vapor after heat exchange is sent to the second mixer 7 for circulation.

[0043] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A solar water splitting hydrogen production system coupled with solar thermal power generation, characterized in that: The water decomposition hydrogen production system comprises a catalyst deoxygenation unit (11) and a hydrogen production unit (12). The catalyst deoxygenation unit (11) is connected to the hydrogen production unit (12), and a hydrogen production catalyst is arranged inside the catalyst deoxygenation unit for generating photo-induced oxygen vacancies in the hydrogen production catalyst under the irradiation of short-wavelength sunlight with a wavelength below 400 nm and feeding the photo-induced oxygen vacancies into the hydrogen production unit (12). The catalyst deoxygenation unit (11) comprises a photoreaction component (3) and a second auxiliary component. The photoreaction component (3) comprises a feeding port (14), a blunt body spoiler and a photoreaction channel (15). The feeding port (14) is connected to the photoreaction channel (15) and is used to feed a substance containing oxygen into the photoreaction channel (15). Circulating water containing a hydrogen production catalyst; the blunt body spoiler is arranged inside the light reaction channel (15) and at the entrance of the light reaction channel (15), and is used to generate turbulence so that the hydrogen production catalyst is evenly dispersed in the circulating water; the light reaction channel (15) is made of glass, and its outlet is connected to the thermal reaction component (2), and is used to make the hydrogen production catalyst generate photo-induced oxygen vacancies under the irradiation of short-wavelength sunlight and send them into the thermal reaction component (2), and the bottom of the light reaction channel (15) is coated for transmitting long-wavelength sunlight with a wavelength band above 400nm, and the coating treatment is to coat TiN, ZnO and SiO2 on the outer side of the glass from the inside to the outside in sequence; The hydrogen production unit (12) comprises a thermal reaction component (2) and a first auxiliary component. The thermal reaction component (2) is arranged below the catalyst deoxygenation unit (11) and is connected to the catalyst deoxygenation unit and the first auxiliary component respectively, and is used to collect long-wavelength sunlight with a wavelength of more than 400 nm to heat water vapor. The water vapor is decomposed under the action of a hydrogen production catalyst having photo-induced oxygen vacancies to produce hydrogen and is sent to the first auxiliary component; the first auxiliary component is connected to the catalyst deoxygenation unit (11) and is used to separate the hydrogen and return the hydrogen production catalyst to the catalyst deoxygenation unit for circulation.

2. The solar water splitting hydrogen production system coupled with solar thermal power generation according to claim 1, characterized in that: The solar water decomposition hydrogen production system coupled with photothermal power generation further comprises a solar photothermal power generation unit (13), wherein the solar photothermal power generation unit (13) comprises a collector array (10) and a steam turbine (1), wherein the collector array (10) is arranged below the catalyst deoxidation unit (11) and is used to collect the long-wavelength sunlight to heat water into water vapor and feed the water into the steam turbine (1); the steam turbine (1) is used to generate electricity using the water vapor to realize solar photothermal utilization.

3. The solar water splitting hydrogen production system coupled with solar thermal power generation according to claim 2, characterized in that: The water decomposition hydrogen production system further comprises a heat exchanger (5) arranged between the hydrogen production unit (12) and the solar thermal power generation unit (13), wherein the heat exchanger (5) is used to exchange heat between the water vapor fed into the hydrogen production unit (12) and the extraction steam of the steam turbine (1), thereby realizing efficient utilization of thermal energy.

4. The solar water splitting hydrogen production system coupled with solar thermal power generation according to claim 1, characterized in that: The first auxiliary component comprises a first separator (8), a hydrogen storage tank (9) and a first mixer (4), wherein one end of the first separator (8) is connected to the outlet of the thermal reaction component (2), and the other end thereof is respectively connected to the hydrogen storage tank (9), the heat exchanger (5) and the first mixer (4); a cyclone separator is provided at the inlet of the first separator (8), and a hydrogen separation membrane is provided inside the cyclone separator for performing gas-solid separation and hydrogen filtration on the mixed product gas fed from the thermal reaction component (2), and then feeding the hydrogen, water vapor and hydrogen production catalyst into the hydrogen storage tank (9), the heat exchanger (5) and the first mixer (4); the first mixer (4) is connected to the inlet of the catalyst deoxidation unit (11), and is used to mix the hydrogen production catalyst with the circulating water and feed the mixed product gas into the catalyst deoxidation unit (11).

5. The solar water splitting hydrogen production system coupled with solar thermal power generation according to claim 3, characterized in that: The catalyst deoxidation unit (11) comprises a photoreaction component (3) and a second auxiliary component, wherein a hydrogen production catalyst is arranged inside the photoreaction component (3) to generate photo-induced oxygen vacancies under the excitation of short-wavelength sunlight below 400 nm; the second auxiliary component comprises a second separator (6) and a second mixer (7), one end of the second separator (6) is connected to the outlet of the photoreaction component (3), and the other end thereof is connected to the second mixer (7) and the first mixer (4), respectively, for separating the hydrogen production catalyst having photo-induced oxygen vacancies from the circulating water and feeding them into the second mixer (7) and the first mixer (4), respectively; one end of the second mixer (7) is connected to the second separator (6) and the heat exchanger (5), and the other end thereof is connected to the inlet of the thermal reaction component (2), for mixing the hydrogen production catalyst having photo-induced oxygen vacancies with the water vapor after heat exchange and feeding them into the thermal reaction component (2).

6. The solar water splitting hydrogen production system coupled with solar thermal power generation according to claim 1, characterized in that: The shape of the bluff body spoiler is a triangle.

7. The solar water splitting hydrogen production system coupled with solar thermal power generation according to claim 1, characterized in that: The hydrogen production catalyst is CeO2 and / or TiO2, and the particle size of the hydrogen production catalyst is 5nm to 50nm.

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