Reaction device for photocatalytic hydrogen production laboratory
By designing a photocatalytic hydrogen production laboratory reaction device including a catalyst plate layer and a circulation loop, the problem of insufficient contact between the catalyst and the reaction liquid is solved, and continuous reaction and reaction efficiency are achieved.
Patent Information
- Application Number
- CN202420362758.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-02-27
AI Technical Summary
In the existing reaction device for photocatalytic hydrogen production laboratory, the contact between the catalyst and the reaction liquid is insufficient, resulting in discontinuous photocatalytic reaction and low reaction efficiency.
A reaction device including a light-transmitting plate, a reaction chamber, a catalyst plate layer, an inlet pipe, an outlet pipe, a liquid inlet pipe and a liquid outlet pipe are designed. The catalyst plate layer is arranged at the bottom of the reaction chamber, and the liquid inlet pipe and the liquid outlet pipe form a circulation loop to ensure that the reaction liquid fully contacts the catalyst and realizes continuous reaction.
Through this device, the reaction liquid can be more fully contacted with the catalyst, achieving continuous reaction, thereby improving the reaction efficiency.
Smart Images
Figure CN222789185U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photocatalysis, in particular to a reaction device for photocatalytic hydrogen production laboratory. Background Art
[0002] In recent years, the use of photocatalytic technology to produce hydrogen from aqueous solution systems as a clean energy has received widespread attention, including different systems such as pure water, seawater, and wastewater. In the photocatalytic process, the photocatalytic hydrogen production device is the core equipment, and its structure and performance have a decisive influence on the efficiency and stability of photocatalytic hydrogen production. However, there are not many laboratory studies on photocatalytic hydrogen production equipment at present, and most reactors are intermittent reaction devices, lacking the ability of continuous operation and large processing capacity. It is difficult to achieve scale and industrialization. Utility Model Content
[0003] Based on this, it is necessary to provide a photocatalytic hydrogen production laboratory reaction device, which aims to solve the technical problems of insufficient contact between the catalyst and the reaction liquid, discontinuous photocatalytic reaction, and low reaction efficiency in the existing photocatalytic hydrogen production laboratory reaction device.
[0004] The utility model provides a photocatalytic hydrogen production laboratory reaction device, comprising:
[0005] A photocatalytic hydrogen production laboratory reaction device, characterized in that it includes: a light-transmitting plate, a reaction chamber, a catalyst plate layer, an air inlet pipeline, an air outlet pipeline, a liquid inlet pipeline and a liquid outlet pipeline, wherein the catalyst plate layer is arranged at the bottom of the reaction chamber and is used to load the catalyst, the liquid inlet pipeline connects the liquid inlet of the reaction chamber and the outlet of the fluid pump, the liquid outlet pipeline connects the liquid outlet of the reaction chamber and an intermediate storage tank, and the intermediate storage tank connects the inlet of the fluid pump and the liquid outlet of the reaction chamber, so that the reaction chamber, the liquid inlet pipeline, the fluid pump, the intermediate storage tank and the liquid outlet pipeline form a circulation loop. The air inlet pipeline is connected to the gas inlet of the reaction chamber, the air outlet pipeline is connected to the gas outlet of the reaction chamber, and the gas outlet enters the online monitoring device, so that the amount of hydrogen produced by the catalytic reaction in the reaction chamber can be measured online in real time.
[0006] In one of the embodiments, the catalyst plate layer is composed of a catalyst plate layer body, a catalyst and a base plate. The catalyst plate layer body is a supporting frame structure, and the base plate is fixed on the top thereof for carrying the catalyst. The catalyst is loaded on the base plate by spraying, drying and calcining, so that the catalyst can be evenly and permanently loaded on the base plate, and can be flexibly replaced to meet the needs of catalyst regeneration, etc.
[0007] In one embodiment, the bottom plate is a quartz glass plate, which can maintain structural integrity under the temperature range of 300-600° C. required for catalyst calcination.
[0008] In one embodiment, the light-transmitting plate is composed of a light-transmitting plate body and a light window, and the light window is detachably covered on the light-transmitting plate body to ensure airtightness.
[0009] In one embodiment, the bottom plate is composed of a reaction area and a liquid inlet and outlet area. The liquid inlet and outlet area adopts a tree-like microchannel, so that the liquid is more evenly distributed in the reaction area and can increase the contact area and mass transfer between the liquid and the catalyst.
[0010] In one embodiment, the catalyst is a TiO2-based composite catalyst, which is composed of TiO2 and a promoter, and the promoter is platinum metal, and the mass fraction of the promoter is 1%.
[0011] In one embodiment, the air inlet pipeline, the air outlet pipeline, the liquid inlet pipeline and the liquid outlet pipeline are all provided with control valves, and the control valves are two-way ball valves so as to be able to control the flow and pressure of gas and liquid.
[0012] In one embodiment, a notch is provided in the reaction chamber, and the reaction chamber can be connected with the outside through the notch.
[0013] In one embodiment, sealing rings and hexagonal screws are installed between the layers, and the hexagonal screws can be tightly connected between the layers to ensure the sealing and safety of the reaction chamber.
[0014] The light window is made of high-purity quartz glass material, so that an external light source can penetrate the light window into the reaction chamber, thereby providing light energy required for the photocatalytic reaction.
[0015] In one embodiment, the gas outlet of the photocatalytic hydrogen production laboratory reaction device enters an online monitoring device, so that the amount of hydrogen generated by the catalytic reaction in the reaction chamber can be measured online in real time.
[0016] Implementing the embodiments of the present utility model will have the following beneficial effects:
[0017] The photocatalytic hydrogen production laboratory reaction device of the utility model is adopted. The reactor body of the photocatalytic hydrogen production laboratory reaction device has a reaction chamber, a catalyst plate layer is arranged at the bottom of the reaction chamber, and is used to load the catalyst. The liquid inlet pipeline is connected to the liquid inlet of the reaction chamber and the outlet of the fluid pump, and the liquid outlet pipeline is connected to the liquid outlet of the reaction chamber and an intermediate storage tank, and the intermediate storage tank is connected to the inlet of the fluid pump and the liquid outlet of the reaction chamber, so that the reaction chamber, the liquid inlet pipeline, the fluid pump, the intermediate storage tank and the liquid outlet pipeline form a circulation loop. The air inlet pipeline is connected to the gas inlet of the reaction chamber, the air outlet pipeline is connected to the gas outlet of the reaction chamber, and the gas outlet enters the online monitoring device, so that the amount of hydrogen produced by the catalytic reaction in the reaction chamber can be measured online in real time. The reaction liquid can contact the catalyst more fully and can achieve continuous reaction, thereby improving the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0019] in:
[0020] Figure 1 Schematic diagram of a laboratory reaction device for photocatalytic hydrogen production in one embodiment.
[0021] Figure 2 for Figure 1 A front view of the reaction device for photocatalytic hydrogen production in the laboratory is shown.
[0022] Figure 3 for Figure 2 A top view of the reaction device for photocatalytic hydrogen production in the laboratory.
[0023] Figure 4 for Figure 1 A cross-sectional view of the reaction device for photocatalytic hydrogen production in the laboratory is shown.
[0024] Figure 5 for Figure 1 The cross-sectional view of each layer of the reaction device for photocatalytic hydrogen production in the laboratory is shown.
[0025] Figure 6 for Figure 2 Schematic diagram of the bottom plate in the photocatalytic hydrogen production laboratory reaction device shown.
[0026] Figure numerals: 1. light-transmitting plate; 11. light window; 12. light-transmitting plate body; 2. reaction chamber; 21. reaction cavity; 22. reaction chamber body; 3. catalyst plate layer; 31. bottom plate; 32. catalyst plate layer body; 311. tree-like microchannel; 312. catalyst; 4. air inlet pipe; 5. air outlet pipe; 6. liquid inlet pipe; 7. liquid outlet pipe; 8. hexagonal screw; 9. sealing ring. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0029] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.
[0030] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.
[0031] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.
[0032] Please combine Figures 1 to 6 , the photocatalytic hydrogen production laboratory reaction device provided by the utility model is now described. The photocatalytic hydrogen production laboratory reaction device includes 1, a light-transmitting plate; 2, a reaction chamber; 3, a catalyst plate layer; 4, an air inlet pipeline; 5, an air outlet pipeline; 6, a liquid inlet pipeline; 7, a liquid outlet pipeline; 8, a hexagonal screw; 9, a sealing ring. Hexagonal screws are used to fasten each layer, and sealing rings are added between each layer to reduce the leakage of the reactor, thereby improving the sealing of the reactor 3.
[0033] It can be understood that the reaction chamber 2 has a reaction chamber 21, the catalyst plate layer 3 is arranged at the bottom of the reaction chamber 2, the bottom plate 31 is located above the catalyst plate layer body 32 as a supporting structure of the catalyst plate layer, and is used to hold the catalyst, and the air inlet pipeline 4 and the air outlet pipeline are connected to the reaction chamber 21 so that the gas in the reaction chamber can be sent to the online monitoring. The liquid inlet pipeline 6 and the liquid outlet pipeline 7 are connected to the reaction chamber 21 so that the reaction liquid can be transported to the reaction chamber 21, the liquid inlet pipeline 6 connects the inlet of the reaction chamber 21 and the outlet of the fluid pump, the liquid outlet pipeline 7 connects the outlet of the reaction chamber 21 and the inlet of the intermediate storage tank, and the outlet of the intermediate storage tank is connected to the inlet of the fluid pump, so that the reaction chamber 21, the liquid inlet pipeline 6, the fluid pump, the intermediate storage tank and the liquid outlet pipeline 7 form a circulation loop, so that the reaction liquid can circulate in the circulation loop, and the reaction liquid can more fully contact the catalyst, thereby improving the reaction efficiency.
[0034] In this embodiment, the photocatalytic hydrogen production laboratory reaction device also includes a light window 11, a hexagonal screw 8 and a sealing ring 9. The light window 11 is detachably covered on the light-transmitting plate body 12 to be able to close the light-transmitting plate body 12. Specifically, the light window 11 is made of high-purity quartz glass. The external light source can pass through the light window 11 and irradiate the catalyst. After the catalyst absorbs the incident light, part of it is converted into heat to heat up the catalyst. The continuous liquid phase flow in the reactor can fully take away this part of the heat without the need to add additional heat dissipation equipment.
[0035] Further, the sealing ring 9 is installed between the light window 11 and the reaction chamber body 22, between the reaction chamber body 22 and the bottom plate 31, and between the bottom plate 31 and the catalyst plate layer body 32. The catalyst plate layer body 32 is a supporting frame structure, and the bottom plate 31 is fixed on the top thereof to carry the catalyst 312. The above-mentioned parts are fastened with hexagonal screws, so that the sealing ring 9 can be tightly connected between the light window 11 and the reaction chamber body 22, between the reaction chamber body 22 and the bottom plate 31, and between the bottom plate 31 and the catalyst plate layer body 32, so as to improve the airtightness of the reactor connection.
[0036] Furthermore, the light-transmitting plate body 12, the reaction chamber body 22, and the catalyst plate layer body 32 are all made of polytetrafluoroethylene material to ensure that they are not corroded in an acid-base system, thereby improving the working environment tolerance of the reactor.
[0037] In this embodiment, the bottom plate 31 is a quartz glass plate to ensure that it is not corroded in an acid-base system and to meet the catalyst calcination temperature requirements.
[0038] In this embodiment, the catalyst is a TiO2-based composite catalyst. Specifically, the TiO2-based composite catalyst is composed of TiO2 and a promoter platinum metal, and the mass fraction of the promoter is 1% to improve the reaction efficiency.
[0039] In this embodiment, the control valves provided in the air inlet pipeline 4, the air outlet pipeline 5, the liquid inlet pipeline 6 and the liquid outlet pipeline 7 are two-way ball valves (model QF-16P), whose diameter is consistent with the inner diameter of the pipeline, and can realize linear flow regulation.
[0040] Furthermore, the catalyst adopts a spraying technology, and uses compressed air to decompose the coating liquid into a fine mist and spray it onto the bottom plate 31 to improve the uniformity of the catalyst on the bottom plate 31.
[0041] Furthermore, after the catalyst is sprayed onto the bottom plate 31 , it is calcined at 300° C. for 1 hour to improve the stability of the catalyst on the bottom plate 31 and reduce the mass loss of the catalyst during the contact with the mobile phase and the reaction process.
[0042] Furthermore, the bottom plate 31 after the reaction is calcined at 300° C. for 1 hour to remove surface pollutants, thereby realizing the reuse of the photocatalyst.
[0043] In this embodiment, the bottom plate 31 adopts a rectangular tree-like microchannel design. After the reaction liquid flows through the tree-like microchannel 311, it can be more evenly distributed on the surface of the catalyst 312 to increase the contact area between the catalyst 312 and the reaction liquid, thereby improving the reaction efficiency.
[0044] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0045] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.
Claims
1. A photocatalytic hydrogen production laboratory reaction device, characterized in that: include: A light-transmitting plate, a reaction chamber, a catalyst plate layer, an air inlet pipeline, an air outlet pipeline, a liquid inlet pipeline and a liquid outlet pipeline. The catalyst plate layer is arranged at the bottom of the reaction chamber and is used to load the catalyst. The liquid inlet pipeline is connected to the liquid inlet of the reaction chamber and the outlet of the fluid pump. The liquid outlet pipeline is connected to the liquid outlet of the reaction chamber and an intermediate storage tank. The intermediate storage tank is connected to the inlet of the fluid pump and the liquid outlet of the reaction chamber, so that the reaction chamber, the liquid inlet pipeline, the fluid pump, the intermediate storage tank and the liquid outlet pipeline form a circulation loop. The air inlet pipeline is connected to the gas inlet of the reaction chamber, the air outlet pipeline is connected to the gas outlet of the reaction chamber, and the gas outlet enters the online monitoring device to be able to measure the amount of hydrogen produced by the catalytic reaction in the reaction chamber in real time online.
2. The photocatalytic hydrogen production laboratory reaction device according to claim 1 is characterized in that: The reaction device can be divided into three layers, namely a light-transmitting plate, a reaction chamber, and a catalyst plate layer. The light-transmitting plate is located at the top of the reaction device, the reaction chamber is located directly below the light-transmitting plate, and the catalyst plate layer is located below the reaction chamber.
3. The photocatalytic hydrogen production laboratory reaction device according to claim 2 is characterized in that: The light-transmitting plate is composed of a light-transmitting plate body and a light window, and the light window is detachably covered on the light-transmitting plate body to ensure airtightness.
4. The photocatalytic hydrogen production laboratory reaction device according to claim 2 is characterized in that: The catalyst plate layer is composed of a catalyst plate layer body, a catalyst and a bottom plate. The catalyst is loaded on the bottom plate by spraying, drying and calcining, so that the catalyst can be loaded on the bottom plate evenly and permanently.
5. The photocatalytic hydrogen production laboratory reaction device according to claim 4 is characterized in that: The bottom plate is composed of a reaction area and a liquid inlet and outlet area. The liquid inlet and outlet area adopts a tree-like microchannel, so that the liquid is more evenly distributed in the reaction area and can increase the contact area and mass transfer between the liquid and the catalyst.
6. The photocatalytic hydrogen production laboratory reaction device according to claim 1 is characterized in that: The air inlet pipeline, the air outlet pipeline, the liquid inlet pipeline and the liquid outlet pipeline are all provided with control valves, and the control valves are two-way ball valves so as to be able to control the flow and pressure of gas and liquid.
7. The photocatalytic hydrogen production laboratory reaction device according to claim 1 is characterized in that: The reaction chamber is also provided with a notch, and the reaction chamber can be communicated with the outside through the notch.
8. The photocatalytic hydrogen production laboratory reaction device according to claim 2 is characterized in that: Sealing rings and hexagonal screws are also installed between the layers, and the hexagonal screws can be tightly connected between the layers to ensure the sealing and safety of the reaction chamber.
9. The photocatalytic hydrogen production laboratory reaction device according to claim 3 is characterized in that: The light window is made of high-purity quartz glass material, so that an external light source can penetrate the light window into the reaction chamber, thereby providing light energy required for the photocatalytic reaction.