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Mass transfer reinforced bubbling fixed bed photocatalytic carbon dioxide reduction reactor and method

A bed photocatalytic carbon dioxide and reactor technology, applied in the field of solar photocatalytic reactions, can solve the problems of limited mass transfer, low local concentration, limited catalyst loading, etc., to achieve enhanced mass transfer, increased activity, and improved mass transfer performance Effect

Pending Publication Date: 2022-08-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. CO in a single suspension system 2 The limited solubility of , resulting in limited mass transfer, CO on the surface of nanoparticles 2 low local concentration;
[0005] 2. A single suspension system cannot realize the separation of the catalyst and the reaction solution, and puts forward higher requirements for the separation and storage of the product;
[0006] 3. The conventional fixed-bed reaction system has a limited catalyst loading capacity, and the light-receiving area is limited by the shape of the reactor, and it is also unable to solve the problem of CO 2 Mass transfer problems at catalytic interfaces

Method used

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  • Mass transfer reinforced bubbling fixed bed photocatalytic carbon dioxide reduction reactor and method
  • Mass transfer reinforced bubbling fixed bed photocatalytic carbon dioxide reduction reactor and method
  • Mass transfer reinforced bubbling fixed bed photocatalytic carbon dioxide reduction reactor and method

Examples

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Embodiment 1

[0050] see Figure 1 to Figure 3 As shown, the present invention provides a bubbling fixed bed photocatalytic carbon dioxide reduction reactor with enhanced mass transfer, comprising a light window cover plate 1, a quartz light window 2, a reaction chamber 3, a bubbling bed 4, an air inlet base 5 and Heat exchange jacket 10.

[0051] The reaction cavity 3 is in the shape of a rounded truncated cone, and the interior is hollow to form a reaction space; the cross-section of the reaction space is an equilateral trapezoid. The quartz optical window 2 is placed between the optical window cover 1 and the upper surface of the reaction chamber 3, and the optical window cover 1, the quartz optical window 2 and the reaction chamber 3 are tightly sealed by bolts on both sides. The bubbling bed 4 is placed between the lower end of the reaction chamber 3 and the upper end of the air inlet base 5, and the reaction chamber 3, the bubbling bed 4 and the air inlet base 5 are connected by bolt...

Embodiment 2

[0056] In this example, the reaction device was used for CuInS at room temperature (25°C). 2-x Nanocatalyst photocatalytic CO 2 Reduction reaction: select microporous quartz sand core (average pore size is 200nm) as bubbling bed 4, and 50mg CuInS 2-x The powder photocatalyst was spin-coated and supported on the bubbling bed 4 of the microporous quartz sand core and placed in the reactor system. The in-situ monitoring hole is provided with an in-situ camera, and the sensor holes are respectively set as a temperature sensor, a pressure sensor, and a pH meter. When the reactor is running, the center of the sensor hole is 5 mm from the upper surface of the gas bubbling bed 4 .

[0057] The heat exchange jacket 10 selects the condensation mode, and the circulating heat exchange working medium is set to water at 25°C; The main body material of the heat exchange jacket 10 is stainless steel. The outer side of the air inlet hole of the air inlet base 5 is set as a threaded hole, t...

Embodiment 3

[0061] In this example, the reaction device was used for 80°C TiO 2 -C 3 N 4 Nanocatalyst photothermal catalysis of CO 2 Reduction reaction: copper foam (average pore size is about 50 μm) is used as the bubbling bed 4, and TiO is grown by in-situ hydrothermal growth. 2 -C 3 N 4 Nanoparticles are supported on the bubbling bed 4 of foamed copper, and the bubbling bed 4 is placed in this reactor system. The in-situ monitoring hole is provided with an in-situ camera, and the sensor holes are respectively set as a temperature sensor, a pH meter, and a pressure sensor. When the reactor is running, the distance between the center of the sensor hole and the upper surface of the bubble dispersion bed is 5 mm.

[0062] The heat exchange jacket 10 selects a heating mode, the heat exchange jacket 10 is connected to an external heating power source and the constant temperature is set to 80°C. The outer side of the air inlet hole of the air inlet base 5 is set as a threaded hole, the...

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Abstract

The invention belongs to the field of solar photocatalytic reaction, and discloses a mass transfer enhanced bubbling fixed bed photocatalytic carbon dioxide reduction reactor and method, and the reactor comprises a reaction cavity which is in an inverted circular truncated cone shape, and the interior of the reaction cavity is hollow to form a reaction space; the quartz light window is mounted at the top of the reaction cavity; the gas inlet base is mounted at the lower part of the reaction cavity; and the bubbling bed is arranged between the lower end of the reaction cavity and the upper end of the air inlet base. Compared with a traditional powder suspension system photocatalytic reaction system, the reactor has the advantages that the mass transfer performance of a catalyst interface is fully improved, the CO2 reduction reaction of the interface is always in a sufficient state of protons, electrons and CO2 molecules through regulation and control of a three-phase interface while efficient light absorption is achieved, and the activity of the CO2 reduction reaction of a solution system is effectively improved.

Description

technical field [0001] The invention belongs to the field of solar photocatalytic reaction, in particular to a mass transfer-enhanced bubbling fixed bed photocatalytic carbon dioxide reduction reactor and a method. Background technique [0002] Solar photocatalytic technology has been widely used in many fields such as energy, environment, chemical industry, and biology due to its advantages of mild conditions, low energy consumption, simple operation, and cleanliness. As the main equipment of the photocatalytic reaction, the photocatalytic reactor largely determines the conversion efficiency of the energy flow and material flow of the photocatalytic reaction. Photocatalytic CO especially in solution system 2 Reduction involves not only multi-substance coupling reactions such as photons, electrons, protons, molecules, and ions, but also the distribution of gas-liquid-solid three-phase interfaces, as well as multi-physical field couplings such as flow field, temperature fiel...

Claims

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Application Information

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IPC IPC(8): B01J8/02B01J19/12
CPCB01J8/02B01J8/0285B01J8/001B01J8/008B01J19/12Y02A50/20
Inventor 郭烈锦白生杰刘亚
Owner XI AN JIAOTONG UNIV
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