Simple multi-position gas-solid phase reaction photocatalytic device

Abstract

The utility model provides a simple multi -position gas -solid phase reaction photocatalytic device, be applicable to the gas solid photocatalytic reaction under the probe type external light source. The device includes light guide cylinder, cylindrical box, 6 hollow quartz tubes. The inside below of box is equipped with fixed plate, and the plate is opened six symmetrical sleeve holes. The most lower end of box has six hose outlets. The inside upper end of box has detachable locating plate. The locating plate center hole is connected with light guide cylinder, and the locating plate edge is equipped with six sleeve holes, and the six sleeve holes of fixed plate are matched, and the quartz tube is fixed in the box with 60-80 degree inclination angle. The quartz tube both ends are opened, and the catalyst sheet installation and disassembly are convenient. The quartz tube both ends are equipped with hose connection, and each hose interface is equipped with control valve. The device supports multiple parallel reactions to be carried out simultaneously. The device can be flexibly switched to a closed static reaction mode or a dynamic continuous flow reaction mode, and multiple quartz tubes can also be connected in series by hoses to realize multi-stage dynamic continuous flow photocatalytic reaction. The utility model has the advantages of simple structure, convenient operation, low cost, quick switching of closed type and continuous flow reactor.

Description

Technical Field

[0001] This utility model relates to the field of gas-solid phase photocatalytic reaction, specifically to a multi-position hollow tube photocatalytic reaction device. Background Technology

[0002] Photocatalysis, as one of the core technologies of green chemistry, has shown broad application prospects in environmental remediation (such as VOCs degradation and air purification) and energy conversion (such as CO2 reduction and water splitting for hydrogen production). Gas-solid phase photocatalytic reaction is a core process within this field, and its efficiency is significantly affected by reactor design, light energy utilization, and the efficiency of catalyst-reactant contact. Traditional gas-solid phase photocatalytic reactors mostly employ fixed-bed, fluidized-bed, or flat-plate structures, but these still have many limitations in practical applications. Regarding light utilization, probe-type external light sources are favored due to their ability to precisely control light intensity and wavelength; however, existing reactors lack suitable light-guiding structures, often resulting in light scattering losses or mismatched irradiation ranges, reducing energy utilization efficiency. Furthermore, most devices do not integrate reaction mode switching functions, requiring researchers to replace different equipment to meet the needs of closed static reactions or dynamic continuous flow experiments, increasing time and economic costs. In summary, developing a compact gas-solid phase photocatalytic device that supports multiple parallel and multi-stage series reactions, allows for flexible switching of reaction modes, and is adaptable to external light sources is of great significance for improving experimental efficiency, reducing research costs, and advancing research on photocatalytic mechanisms. This invention proposes an innovative solution to the aforementioned problems. Summary of the Invention

[0003] A simple multi-position gas-solid phase photocatalytic reaction device includes a light guide tube, a cylindrical housing, and six hollow quartz tubes. A fixing plate with six symmetrically shaped holes is located at the bottom of the housing. Six flexible hose outlets are located at the bottom of the housing. A detachable positioning plate is located at the top of the housing. The center hole of the positioning plate connects to the light guide tube, and six holes along the edge of the positioning plate mate with the six holes on the fixing plate to fix the quartz tubes at a 60-80 degree angle within the housing. The quartz tubes are open at both ends for easy installation and removal of catalyst sheets. Flexible hoses are connected to both ends of the quartz tubes, and each hose interface is equipped with a control valve.

[0004] The light guide tube is made of 304 stainless steel, and the inner wall is mirror polished with a reflectivity of ≥90%. The diameter of the light guide tube is adapted to the spot diameter of the probe-type light source to ensure precise matching of the optical path.

[0005] Furthermore, the enclosure is made of polytetrafluoroethylene or stainless steel, with an opening at the bottom and six symmetrical flexible hose outlets around the bottom of the enclosure.

[0006] Furthermore, the fixing plate is made of polytetrafluoroethylene and has six symmetrical holes. The fixing plate is 1-3 cm above the bottom of the box.

[0007] Furthermore, the positioning plate is made of polytetrafluoroethylene, the inner diameter of the central large hole is equal to the inner diameter of the light guide tube, and six symmetrical sleeve holes are evenly distributed on the edge of the positioning plate.

[0008] Furthermore, the flexible tube is a high-temperature resistant silicone tube (withstanding a temperature of 200°C) to accommodate the possible exothermic reaction during the photocatalysis process.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] Through multi-parallel operation, flexible switching, multi-stage series connection, light guide optimization, and modular design, the system systematically solves the pain points of traditional gas-solid phase photocatalytic devices in terms of experimental efficiency, ease of operation, functional scalability, and light energy utilization. It is especially suitable for laboratory-grade catalyst development and reaction mechanism research. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a simplified multi-site gas-solid phase reaction photocatalytic device according to this utility model;

[0012] Attached reference numerals: 1. Light guide tube, 2. Positioning plate, 3. Hollow quartz tube, 4. Cylindrical box, 5. Fixing plate, 6. Air inlet hose, 7. Catalyst filling position, 8. Air outlet hose, 9. Control valve. Detailed Implementation

[0013] It should be understood that the terms "internal", "lower end", "upper end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0014] Example 1

[0015] See Figure 1 A simple multi-position gas-solid phase photocatalytic reaction device includes a light guide tube, a cylindrical box, and six hollow quartz tubes. A fixing plate with six symmetrical holes is located at the bottom of the box. Six flexible hose outlets are located at the bottom of the box. A detachable positioning plate is located at the top of the box. The center hole of the positioning plate connects to the light guide tube, and six holes along the edge of the positioning plate mate with the six holes of the fixing plate to fix the quartz tubes at a 60-80 degree angle inside the box. The quartz tubes are open at both ends for easy installation and removal of the catalyst sheet. Flexible hoses are connected to both ends of the quartz tubes, and each hose interface is equipped with a control valve. The catalyst sheet is filled into the lower part of the quartz tube, ensuring that the catalyst sheet is in the area vertically irradiated by the light source introduced by the light guide tube. If the catalyst is in powder form, it can be spread flat on quartz wool (pressed into a sheet) or metal foam sheet.

[0016] Preferably, the catalyst sheet is 2 cm away from the fixing plate.

[0017] Preferably, the reaction gas source enters six tubes simultaneously and exits from six hose outlets. After the air in the quartz tube is replaced, the hose interface valve is closed to enable the parallel evaluation of six sets of closed static photocatalytic reactions.

[0018] Example 2

[0019] See Figure 1 A simple multi-position gas-solid phase photocatalytic reaction device includes a light guide tube, a cylindrical box, and six hollow quartz tubes. A fixing plate with six symmetrical holes is located at the bottom of the box, and six flexible hose outlets are located at the bottom of the box. A detachable positioning plate is located at the top of the box. The center hole of the positioning plate connects to the light guide tube, and six holes along the edge of the positioning plate mate with the six holes of the fixing plate to fix the quartz tubes at a 60-80 degree angle inside the box. The quartz tubes are open at both ends for easy installation and removal of the catalyst sheet. Flexible hoses are connected to both ends of the quartz tubes, and each hose interface is equipped with a control valve. The catalyst sheet is filled into the lower part of the quartz tube, ensuring that the catalyst sheet is in the area vertically irradiated by the light source introduced by the light guide tube. If the catalyst is in powder form, it can be spread flat on quartz wool (pressed into a sheet) or metal foam sheet.

[0020] Preferably, the catalyst sheet is 2 cm away from the fixing plate.

[0021] Preferably, the reaction gas source enters six tubes simultaneously and exits from six hose outlets. After the air in the quartz tube is replaced, the hose interface valve is not closed, so that six groups of dynamic continuous photocatalytic reactions can be evaluated in parallel.

[0022] Example 3

[0023] See Figure 1 A simple multi-position gas-solid phase photocatalytic reaction device includes a light guide tube, a cylindrical box, and six hollow quartz tubes. A fixing plate with six symmetrical holes is located at the bottom of the box. Six flexible hose outlets are located at the bottom of the box, and a detachable positioning plate is located at the top of the box. The center hole of the positioning plate connects to the light guide tube, and six holes along the edge of the positioning plate mate with the six holes on the fixing plate to fix the quartz tubes at a 60-80 degree angle inside the box. The quartz tubes are open at both ends for easy installation and removal of the catalyst sheet. Flexible hoses are connected to both ends of the quartz tubes, and each hose interface is equipped with a control valve. The catalyst sheet is filled into the lower part of the quartz tube, ensuring that the catalyst sheet is in the area vertically irradiated by the light source introduced by the light guide tube. If the catalyst is in powder form, it can be spread flat on quartz wool (pressed into a sheet) or metal foam sheet.

[0024] Preferably, the catalyst sheet is 2 cm away from the fixing plate.

[0025] Preferably, the reaction gas source is connected to the inlet hose of one of the quartz tubes, the outlet of the first quartz tube is connected to the second quartz tube with a hose, and the remaining quartz tubes are connected end to end in the same way. Finally, the gas leaves the reaction device from the sixth quartz tube. After the air in the quartz tube is replaced, the hose interface valve is not closed, so as to realize continuous single-group multi-stage (6-stage) dynamic photocatalytic reaction evaluation.

Claims

1. A simple multi-position gas-solid phase reaction photocatalytic device, comprising a light guide tube, a cylindrical box, and six hollow quartz tubes, characterized in that, The lower part of the chamber has a fixing plate with six symmetrical sleeve holes. There are six flexible tube outlets at the bottom of the chamber. There is a detachable positioning plate at the upper part of the chamber. The center hole of the positioning plate is connected to the light guide tube. There are six sleeve holes on the edge of the positioning plate, which cooperate with the six sleeve holes of the fixing plate to fix the quartz tube in the chamber at an angle of 60-80 degrees. The two ends of the quartz tube are open to facilitate the installation and removal of the catalyst sheet. Flexible tubes are connected to both ends of the quartz tube, and each flexible tube interface is equipped with a control valve.

2. The simplified multi-site gas-solid phase reaction photocatalytic device according to claim 1, characterized in that, The light guide tube is made of 304 stainless steel, and the inner wall is mirror polished with a reflectivity of ≥90%. The diameter of the light guide tube is adapted to the spot diameter of the probe-type light source to ensure precise matching of the optical path.

3. The simplified multi-site gas-solid phase reaction photocatalytic device according to claim 1, characterized in that, The enclosure is made of polytetrafluoroethylene or stainless steel, with an opening at the bottom and six symmetrical flexible hose outlets around the bottom of the enclosure.

4. The simplified multi-site gas-solid phase reaction photocatalytic device according to claim 1, characterized in that, The fixing plate is made of polytetrafluoroethylene and has six symmetrical holes. The fixing plate is 1-3cm high from the bottom of the box.

5. The simplified multi-site gas-solid phase reaction photocatalytic device according to claim 1, characterized in that, The positioning plate is made of polytetrafluoroethylene, and the inner diameter of the central large hole is equal to the inner diameter of the light guide tube. Six symmetrical sleeve holes are evenly distributed on the edge of the positioning plate.

6. The simplified multi-site gas-solid phase reaction photocatalytic device according to claim 1, characterized in that, The hose is a high-temperature resistant silicone tube, which can withstand temperatures up to 200°C.

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