Photocatalytic hydrogen production device with front and back structures

Abstract

The utility model discloses a kind of photocatalytic hydrogen production reaction devices of front and rear structure, including light medium hydrogen production module and with light medium hydrogen production module through circuit connection power supply module;Light medium hydrogen production module includes flat front panel and rear panel, diaphragm is arranged between front panel and rear panel, diaphragm is provided with sealing ring around and sealing ring both sides respectively with the one side flat surface of front panel and rear panel is adhered, anode reaction zone is formed between diaphragm front side and front panel, cathode reaction zone is formed between diaphragm rear side and rear panel;The utility model anode and cathode are respectively arranged in light illumination front and back, light illumination only needs to light catalysis anode reaction zone, to improve light illumination area utilization, make overall reaction area compared with traditional single side device promotion, and by introducing battery, anode reaction zone and cathode reaction zone form potential difference, significantly reduce the recombination probability of electron-hole pair, and potential difference also can participate in electrolysis water reaction, further improve reaction efficiency.

Description

Technical Field

[0001] This invention belongs to the field of photocatalytic hydrogen production technology, specifically a photocatalytic hydrogen production reaction device with a front-to-back structure. Background Technology

[0002] Photocatalytic hydrogen production technology utilizes semiconductor materials to absorb solar energy to drive water splitting. It has advantages such as being green and environmentally friendly and having mild operating conditions, and is an important development direction for hydrogen energy production.

[0003] However, existing photocatalytic hydrogen production reactors mostly employ a single reaction zone or stacked reaction zone design, which has many technical drawbacks. On the one hand, the anode and cathode of traditional devices are mostly concentrated on the same side or adjacent areas. Due to limitations in illumination conditions, only one side of the reaction zone can effectively absorb light energy, resulting in a limited overall reaction area and severely restricting the improvement of hydrogen production efficiency. On the other hand, in order to increase the reaction area, existing devices often use complex pleated structures or porous materials. Although this can increase the contact area to some extent, it also leads to uneven flow field distribution. At the same time, complex structures are difficult to manufacture, costly, and inconvenient to clean and maintain. Long-term use can easily lead to a decrease in reaction efficiency due to the accumulation of impurities. Utility Model Content

[0004] The purpose of this invention is to provide a photocatalytic hydrogen production reactor with a front and rear structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a photocatalytic hydrogen production reactor with a front-to-back structure, comprising a photocatalytic hydrogen production module and a power supply module, wherein the positive and negative electrodes of the power supply module are respectively connected to the anode and cathode electrodes of the photocatalytic hydrogen production module via circuits; the photocatalytic hydrogen production module comprises a flat front panel and a rear panel, the front and rear panels being made of a high-transmittance material and a diaphragm being disposed between the front and rear panels, a sealing ring being disposed around the diaphragm and both sides of the sealing ring being adhered to one side of the flat surface of the front and rear panels respectively, thereby forming an anode reaction zone between the front side of the diaphragm and the front panel, and forming a cathode reaction zone between the rear side of the diaphragm and the rear panel, wherein the anode reaction zone is filled with... The membrane is filled with an electrolyte solution and has multiple connecting holes at its lower part. An anode electrode is fixedly connected to the membrane on one side of the anode reaction zone, and a photocatalyst is attached to the anode electrode. A cathode electrode is fixedly connected to the membrane on one side of the cathode reaction zone. An oxygen exhaust pipe and a liquid drain pipe communicating with the anode reaction zone are provided at the top of the anode reaction zone. The liquid drain pipe is L-shaped, with its upper part located inside the anode reaction zone and its lower part extending laterally through the outer wall of the anode reaction zone to communicate with the outside. A liquid inlet pipe communicating with the anode reaction zone is provided at the bottom of the outer wall of the anode reaction zone. A hydrogen exhaust pipe communicating with the cathode reaction zone is provided at the top of the cathode reaction zone.

[0006] Furthermore, the anode electrode is a porous graphite electrode; the porous structure of porous graphite can reduce the mass transfer resistance during oxygen evolution, while improving the bonding stability between the catalyst and the electrode and preventing detachment.

[0007] Furthermore, it also includes an oxygen after-treatment module and a hydrogen after-treatment module, which are respectively connected to the oxygen exhaust pipe and the hydrogen exhaust pipe through pipelines.

[0008] Furthermore, it also includes a liquid supply module, which comprises an oxygen-water-gas separator, a hydrogen-water-gas separator, a water tank, and a liquid pump. The oxygen-water-gas separator is installed on the connecting pipe between the oxygen post-treatment module and the oxygen exhaust pipe. The inlet of the oxygen-water-gas separator is connected to the oxygen exhaust pipe, and the oxygen outlet of the oxygen-water-gas separator is connected to the oxygen post-treatment module. The water outlet of the oxygen-water-gas separator is connected to the water tank. The hydrogen-water-gas separator is installed on the connecting pipe between the hydrogen post-treatment module and the hydrogen exhaust pipe. The inlet of the hydrogen-water-gas separator is connected to the hydrogen exhaust pipe, and the hydrogen outlet of the hydrogen-water-gas separator is connected to the hydrogen post-treatment module. The water outlet of the hydrogen-water-gas separator is connected to the water tank. The water tank is connected to the liquid inlet pipe through a pipeline, and a liquid pump is installed on the connecting pipe between the water tank and the liquid inlet pipe.

[0009] Preferably, the oxygen post-processing module includes an oxygen drying system, an oxygen purification system, an oxygen pressurization system, an oxygen one-way valve, and an oxygen storage tank connected in sequence, and the air inlet of the oxygen drying system is connected to the oxygen outlet of the oxygen-water-gas separator.

[0010] Preferably, the hydrogen post-processing module includes a hydrogen drying system, a hydrogen purification system, a hydrogen pressurization system, a hydrogen one-way valve, and a hydrogen storage tank connected in sequence, and the inlet of the hydrogen drying system is connected to the hydrogen outlet of the hydrogen-water-gas separator.

[0011] Furthermore, the power supply module includes a photovoltaic panel and a battery connected to the photovoltaic panel via a circuit. The positive and negative terminals of the battery are respectively connected to the anode and cathode electrodes via a circuit. Obtaining electricity through the photovoltaic panel is low-cost and highly environmentally friendly.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. In this invention, the anode and cathode are respectively arranged on the front and back of the light source, and the light only illuminates the anode reaction area that requires photocatalysis, thereby improving the utilization rate of the light area and increasing the overall reaction area compared with the traditional single-sided device, which greatly increases the contact area between the reactants and the electrodes. 2. The photo-media hydrogen production module of this utility model adopts a front-to-back symmetrical structure design, and its overall volume is smaller than that of the traditional double-sided separation device, which facilitates installation and movement and is suitable for miniaturized and distributed application scenarios; 3. The device of this utility model incorporates a storage battery, which creates a potential difference between the anode reaction zone and the cathode reaction zone, significantly reducing the probability of electron-hole recombination. This allows more electrons to be used for hydrogen production and more holes to be used for oxygen production. Furthermore, the potential difference between the anode reaction zone and the cathode reaction zone can also participate in the water electrolysis reaction to produce hydrogen and oxygen, further improving the reaction efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall connection structure of the photocatalytic hydrogen production reactor with front and rear structures provided in this embodiment of the utility model; Figure 2 This is a front cross-sectional view of the photocatalytic hydrogen production module provided in this embodiment of the utility model; Figure 3 This is a rear cross-sectional view of the photocatalytic hydrogen production module provided in this embodiment of the utility model; Figure 4 This is a left view of the photocatalytic hydrogen production module provided in this embodiment of the utility model; In the diagram, 1-Photonic hydrogen production module, 2-Liquid supply module, 3-Oxygen post-treatment module, 4-Hydrogen post-treatment module, 5-Power supply module, 11-Front panel, 12-Rear panel, 13-Diaphragm, 14-Sealing ring, 15-Anode electrode, 16-Cathode electrode, 17-Oxygen exhaust pipe, 18-Drain pipe, 19-Inlet pipe, 110-Hydrogen exhaust pipe, 21-Oxygen-water-gas separator, 22-Hydrogen-water-gas separator, 23-Water tank, 24-Liquid pump, 31-Oxygen drying system, 32-Oxygen purification system, 33-Oxygen pressurization system, 34-Oxygen one-way valve, 35-Oxygen storage tank, 41-Hydrogen drying system, 42-Hydrogen purification system, 43-Hydrogen pressurization system, 44-Hydrogen one-way valve, 45-Hydrogen storage tank, 51-Photovoltaic panel, 52-Battery. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-4This utility model provides a technical solution: a photocatalytic hydrogen production reactor with a front and rear structure, including a photocatalytic hydrogen production module 1, a liquid supply module 2, an oxygen post-processing module 3, a hydrogen post-processing module 4, and a power supply module 5; the liquid supply module 2 is used to supply electrolyte solution to the photocatalytic hydrogen production module 1, the oxygen post-processing module 3 and the hydrogen post-processing module 4 are respectively connected to the oxygen outlet and hydrogen outlet of the photocatalytic hydrogen production module 1 for processing and storing the hydrogen and oxygen produced by the photocatalytic hydrogen production module 1, and the power supply module 5 is used to provide a potential difference to the photocatalytic hydrogen production module 1.

[0016] The photocatalytic hydrogen production module 1 includes a flat front panel 11 and a rear panel 12. The front panel 11 and rear panel 12 are made of a highly transparent material, and a diaphragm 13 is disposed between them. A sealing ring 14 is adhered around the perimeter of the diaphragm 13, and the two sides of the sealing ring 14 are respectively adhered to one flat surface of the front panel 11 and the rear panel 12. This forms an anode reaction zone between the front side of the diaphragm 13 and the front panel 11, and a cathode reaction zone between the rear side of the diaphragm 13 and the rear panel 12. The zone is filled with an electrolyte solution, and the lower part of the diaphragm 13 has multiple connecting holes 131. An anode electrode 15 is fixedly connected to the diaphragm 13 on one side of the anode reaction zone by adhesion. The anode electrode 15 is a porous graphite electrode. The porous structure of the graphite reduces the mass transfer resistance during oxygen evolution and improves the bonding stability between the catalyst and the electrode, preventing detachment. The porosity of the porous graphite is 30%-60%, and the pore size is 50-500 nm. The surface of the porous graphite electrode is grown in situ or through a sol-gel process. A photocatalyst (such as TiO2 or g-C3N4 composite catalyst) is attached by gel method, with a catalyst loading of 0.5-2 g / cm². A graphite cathode electrode 16 is fixedly connected to the diaphragm 13 on one side of the cathode reaction zone by adhesion. An oxygen exhaust pipe 17 and a liquid drain pipe 18 communicating with the anode reaction zone are provided at the top of the anode reaction zone. The liquid drain pipe 18 is L-shaped, with the upper part of the L-shaped liquid drain pipe located inside the anode reaction zone and the lower part of the L-shaped liquid drain pipe extending laterally through the outer wall of the anode reaction zone to communicate with the outside. A liquid inlet pipe 19 communicating with the anode reaction zone is provided at the bottom of the outer wall of the anode reaction zone. A hydrogen exhaust pipe 110 communicating with the cathode reaction zone is provided at the top of the cathode reaction zone.

[0017] The liquid supply module 2 includes an oxygen-water-gas separator 21, a hydrogen-water-gas separator 22, a water tank 23, and a liquid pump 24. The oxygen-water-gas separator 21 is installed on the connecting pipe between the oxygen post-treatment module 3 and the oxygen exhaust pipe 17. The inlet of the oxygen-water-gas separator 21 is connected to the oxygen exhaust pipe 17, the oxygen outlet of the oxygen-water-gas separator 21 is connected to the oxygen post-treatment module 3, and the water outlet of the oxygen-water-gas separator 21 is connected to the water tank 23. The hydrogen-water-gas separator 22 is installed on the connecting pipe between the hydrogen post-treatment module 4 and the hydrogen exhaust pipe 110. The inlet of the hydrogen-water-gas separator 22 is connected to the hydrogen exhaust pipe 110, the hydrogen outlet of the hydrogen-water-gas separator 22 is connected to the hydrogen post-treatment module 4, and the water outlet of the hydrogen-water-gas separator 22 is connected to the water tank 23. The water tank 23 is connected to the liquid inlet pipe 19 through a pipe, and a liquid pump 24 is installed on the connecting pipe between the water tank 23 and the liquid inlet pipe 19 to provide power for the flow of electrolyte solution.

[0018] The oxygen post-processing module 3 includes an oxygen drying system 31, an oxygen purification system 32, an oxygen pressurization system 33, an oxygen one-way valve 34, and an oxygen storage tank 35, which are connected in sequence through pipelines. The air inlet of the oxygen drying system 31 is connected to the oxygen outlet of the oxygen water-gas separator 21.

[0019] The hydrogen post-processing module 4 includes a hydrogen drying system 41, a hydrogen purification system 42, a hydrogen pressurization system 43, a hydrogen one-way valve 44, and a hydrogen storage tank 45, which are connected in sequence through pipelines. The inlet of the hydrogen drying system 41 is connected to the hydrogen outlet of the hydrogen water-gas separator 22.

[0020] The power supply module includes a photovoltaic panel 51 and a battery 52 connected to the photovoltaic panel 51 via a circuit. The positive and negative terminals of the battery 52 are connected to the anode electrode 15 and the cathode electrode 16 via a circuit, respectively. During use, the photovoltaic panel 51 absorbs sunlight to generate direct current, which charges the battery 52. ​​The positive terminal of the battery 52 is connected to the anode electrode 15, and the negative terminal of the battery 52 is connected to the cathode electrode 16, creating a potential difference between the anode electrode 15 and the cathode electrode 16, which can significantly improve the separation efficiency of photogenerated carriers. The principle is that in pure photocatalysis, electron-hole pairs generated by photoexcitation are very easy to recombine, resulting in low reaction efficiency. An external power supply can provide an additional potential difference, forcibly "pulling" photogenerated electrons towards the cathode and "pushing" photogenerated holes towards the anode. This forced separation can significantly reduce the recombination probability of electron-hole pairs, allowing more electrons to be used for hydrogen production and more holes to be used for oxygen production, directly improving the hydrogen production rate and energy conversion efficiency. Meanwhile, the battery 52 also supplies power to the liquid pump 24 to realize the circulation of electrolyte solution; the potential difference formed between the anode electrode 15 and the cathode electrode 16 can also participate in the electrolysis of water to produce hydrogen and oxygen, further improving the reaction efficiency.

[0021] It should be noted that the oxygen-water-gas separator 21, hydrogen-water-gas separator 22, water tank 23, oxygen drying system 31, oxygen purification system 32, oxygen pressurization system 33, oxygen one-way valve 34, oxygen storage tank 35, hydrogen drying system 41, hydrogen purification system 42, hydrogen pressurization system 43, hydrogen one-way valve 44, hydrogen storage tank 45, photovoltaic panel 51, and battery 52 are all commercially available components purchased from the market. Their specific models and specifications need to be selected and determined according to the actual specifications of the device. The selection method and usage method adopt existing technology in this field, so they will not be described in detail.

[0022] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A photocatalytic hydrogen production reactor with a front-to-back structure, characterized in that: The system includes a photocatalytic hydrogen production module and a power supply module. The positive and negative terminals of the power supply module are respectively connected to the anode and cathode electrodes of the photocatalytic hydrogen production module via circuitry. The photocatalytic hydrogen production module includes a flat front panel and a rear panel, both made of highly transparent material. A diaphragm is positioned between the front and rear panels, and a sealing ring is provided around the diaphragm. The two sides of the sealing ring are respectively adhered to one side of the flat surface of the front and rear panels, thereby forming an anode reaction zone between the front side of the diaphragm and the front panel, and a cathode reaction zone between the rear side of the diaphragm and the rear panel. The anode reaction zone is filled with an electrolyte solution. Multiple [unclear - possibly referring to a specific type of electrode or component] are provided at the lower part of the diaphragm. The anode reaction zone has a connecting hole; an anode electrode is fixedly connected to the diaphragm on one side of the anode reaction zone, and a photocatalyst is attached to the anode electrode; a cathode electrode is fixedly connected to the diaphragm on one side of the cathode reaction zone; an oxygen exhaust pipe and a liquid drain pipe communicating with the anode reaction zone are provided at the top of the anode reaction zone; the liquid drain pipe is L-shaped, with the upper part of the L-shaped liquid drain pipe located inside the anode reaction zone and the lower part of the L-shaped liquid drain pipe extending laterally through the outer wall of the anode reaction zone to communicate with the outside; a liquid inlet pipe communicating with the anode reaction zone is provided at the bottom of the outer wall of the cavity of the anode reaction zone; a hydrogen exhaust pipe communicating with the cathode reaction zone is provided at the top of the cathode reaction zone.

2. The photocatalytic hydrogen production reactor with front and rear structures according to claim 1, characterized in that: The anode electrode is a porous graphite electrode.

3. The photocatalytic hydrogen production reactor with front and rear structures according to claim 1, characterized in that: It also includes an oxygen after-treatment module and a hydrogen after-treatment module, which are respectively connected to the oxygen exhaust pipe and the hydrogen exhaust pipe through pipelines.

4. The photocatalytic hydrogen production reactor with front and rear structures according to claim 3, characterized in that: It also includes a liquid supply module, which comprises an oxygen-water-gas separator, a hydrogen-water-gas separator, a water tank, and a liquid pump. The oxygen-water-gas separator is installed on the connecting pipe between the oxygen post-treatment module and the oxygen exhaust pipe. The inlet of the oxygen-water-gas separator is connected to the oxygen exhaust pipe, and the oxygen outlet of the oxygen-water-gas separator is connected to the oxygen post-treatment module. The water outlet of the oxygen-water-gas separator is connected to the water tank. The hydrogen-water-gas separator is installed on the connecting pipe between the hydrogen post-treatment module and the hydrogen exhaust pipe. The inlet of the hydrogen-water-gas separator is connected to the hydrogen exhaust pipe, and the hydrogen outlet of the hydrogen-water-gas separator is connected to the hydrogen post-treatment module. The water outlet of the hydrogen-water-gas separator is connected to the water tank. The water tank is connected to the liquid inlet pipe through a pipeline, and a liquid pump is installed on the connecting pipe between the water tank and the liquid inlet pipe.

5. The photocatalytic hydrogen production reactor with front and rear structures according to claim 4, characterized in that: The oxygen post-processing module includes an oxygen drying system, an oxygen purification system, an oxygen pressurization system, an oxygen one-way valve, and an oxygen storage tank connected in sequence. The air inlet of the oxygen drying system is connected to the oxygen outlet of the oxygen-water-gas separator.

6. The photocatalytic hydrogen production reactor with front and rear structures according to claim 4, characterized in that: The hydrogen post-processing module includes a hydrogen drying system, a hydrogen purification system, a hydrogen pressurization system, a hydrogen one-way valve, and a hydrogen storage tank connected in sequence. The inlet of the hydrogen drying system is connected to the hydrogen outlet of the hydrogen-water-gas separator.

7. The photocatalytic hydrogen production reactor with front and rear structures according to claim 1, characterized in that: The power supply module includes a photovoltaic panel and a battery connected to the photovoltaic panel via a circuit. The positive and negative terminals of the battery are respectively connected to the anode and cathode electrodes via a circuit.

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