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A fiber-optic photocatalytic reactor and method for converting CO2 into methanol

A photocatalytic reactor, CO2 technology, applied in the field of energy and environment, can solve the problems of low utilization rate of CO2, low catalyst light utilization rate, unfavorable photocatalytic reaction, etc., achieve uniform side luminous intensity, facilitate control of reactor temperature and Product collection, high light utilization efficiency

Active Publication Date: 2018-07-10
CHINA SHENHUA ENERGY CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Various CO 2 The problems of the control method are: high energy consumption, high cost, recovered CO 2 low utilization
[0005] Among them, the photocatalytic reactor for photocatalytic reduction of CO 2 However, existing photoreactors, such as suspension reactors and conventional fixed bed reactors, have disadvantages such as low catalyst light utilization, small specific surface area, and difficulty in recycling, which are not conducive to the development of photocatalytic reactions. conduct

Method used

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  • A fiber-optic photocatalytic reactor and method for converting CO2 into methanol
  • A fiber-optic photocatalytic reactor and method for converting CO2 into methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0053] This example is used to illustrate the method for preparing rare earth-doped titania sol of the present invention.

[0054] (1) Mix tetra-n-butyl titanate and absolute ethanol at a volume ratio of 1:4 to obtain an ethanol solution of tetra-n-butyl titanate;

[0055] (2) Mix deionized water, glacial acetic acid and absolute ethanol at a volume ratio of 1:2.5:6 to obtain a mixed solution;

[0056] (3) adding cerium nitrate to the mixed solution obtained in step (2) and mixing;

[0057] (4) Under stirring, add the product obtained in step (3) dropwise to the ethanol solution of tetra-n-butyl titanate obtained in step (1) at a rate of 1.4ml / min, wherein, the product obtained in step (1) The volume ratio of the ethanol solution of tetra-n-butyl titanate to the product obtained in step (3) is 3:1, and in terms of titanium element and rare earth element cerium respectively, the ethanol of the tetra-n-butyl titanate obtained in step (1) The molar ratio of tetra-n-butyl titana...

Embodiment 1-2

[0060] This example is used to illustrate the method for preparing rare earth-doped titania sol of the present invention.

[0061] (1) Mix tetraisopropyl titanate and tert-butanol at a volume ratio of 1:3 to obtain a tert-butanol solution of tetraisopropyl titanate;

[0062] (2) Mix deionized water, 37% by weight hydrochloric acid solution and tert-butanol at a volume ratio of 1:2:5 to obtain a mixed solution;

[0063] (3) adding praseodymium chloride to the mixed solution obtained in step (2) and mixing;

[0064] (4) Under stirring, add the product obtained in step (3) dropwise to the tetraisopropyl titanate solution in tert-butanol obtained in step (1) at a rate of 1.8ml / min, wherein step (1) The volume ratio of the tert-butanol solution of tetraisopropyl titanate obtained to the product obtained in step (3) is 4:1, and in terms of titanium element and rare earth element praseodymium respectively, the tetraisopropyl titanate obtained in step (1) The mol ratio of tetraisopr...

Embodiment 1-3

[0067] This example is used to illustrate the method for preparing rare earth-doped titania sol of the present invention.

[0068] (1) Mix tetraethyl titanate and isopropanol at a volume ratio of 1:5 to obtain an isopropanol solution of tetraethyl titanate;

[0069] (2) Mix deionized water, glacial acetic acid and isopropanol at a volume ratio of 1:3:8 to obtain a mixed solution;

[0070] (3) adding lanthanum acetate to the mixed solution obtained in step (2) and mixing;

[0071] (4) Under stirring, add the product obtained in step (3) dropwise to the isopropanol solution of tetraethyl titanate obtained in step (1) at a rate of 1.2ml / min, wherein, step (1) obtains The volume ratio of the isopropanol solution of tetraethyl titanate to the product obtained in step (3) is 2.5:1, and in terms of titanium element and rare earth element lanthanum respectively, the tetraethyl titanate obtained in step (1) The mol ratio of the tetraethyl titanate in the isopropanol solution and the ...

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Abstract

The invention relates to the field of energy and environment, and discloses an optical fiber photocatalytic reactor and a method for converting CO2 into methanol. The reactor includes a light source (1) and a reaction barrel (2), the reaction barrel is provided with a material inlet (21) and a material outlet (22), and the reaction barrel is provided with an optical fiber loaded with rare earth modified titanium dioxide along the length direction. (3), both ends of the reaction barrel are provided with a sealing plate (5), and at least one end of the sealing plate is provided with a quartz glass sheet (6), and the light source is arranged outside at least one end of the reaction barrel provided with the quartz glass sheet , for injecting light beams into the reaction barrel through a quartz glass plate, wherein the optical fiber (3) loaded with rare earth modified titanium dioxide includes an optical fiber and a layer of rare earth doped titanium dioxide coated on the outer surface of the optical fiber. The reactor is used to convert CO2 into methanol, and the methanol yield is high, the light utilization rate is high, the catalyst has a large specific surface area and is easy to recycle.

Description

technical field [0001] The invention relates to the field of energy and environment, in particular, to a fiber-optic photocatalytic reactor and CO 2 Conversion method to methanol. Background technique [0002] Greenhouse gases such as CO 2 、CH 4 The greenhouse effect caused by such emissions has become a global focus. In recent years, atmospheric CO caused by human production activities 2 The increase in concentration has accelerated the impact of the greenhouse effect on the global climate, how to effectively control CO 2 Emissions have become a national imperative. Since coal is the most important primary energy source in China, my country's CO 2 The emissions are mainly from coal combustion, among which coal-fired power plants are the main ones. Therefore, it is necessary to find a way to effectively control CO in power plants. 2 Emission technology is imminent. [0003] Currently, coal-fired CO 2 Emission control technologies are mainly divided into three catego...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/12B01J23/10C07C31/04C07C29/15
CPCY02P20/52
Inventor 赵永椿孙平韩涛熊卓余学海张军营陈璟郑楚光
Owner CHINA SHENHUA ENERGY CO LTD