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Method for photocatalytic reduction of carbon oxide

A technology of carbon dioxide and photocatalysis, applied in the direction of carbon monoxide, chemical instruments and methods, separation methods, etc., can solve the problems of poor adsorption effect, achieve the effect of increasing adsorption capacity, improving adsorption competitiveness, and improving adsorption power

Inactive Publication Date: 2010-06-16
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for photocatalytic reduction of carbon dioxide. By introducing the step of generating hydrate slurry, the concentration of carbon dioxide in the reaction area is increased, and the problem of poor adsorption effect of carbon dioxide and photocatalyst in the current photocatalytic reduction of carbon dioxide is solved. To achieve the purpose of improving the efficiency of photocatalytic reaction

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  • Method for photocatalytic reduction of carbon oxide
  • Method for photocatalytic reduction of carbon oxide
  • Method for photocatalytic reduction of carbon oxide

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Embodiment 1

[0024] This embodiment is a blank experiment A of the photocatalytic reaction, that is, a photocatalytic reaction experiment under the condition of generating a hydrate-free slurry.

[0025] The reaction kettle of the photocatalytic reaction of the present embodiment is a fully transparent high-pressure sapphire kettle (produced by DBROBINSON, Canada), with a volume of 78ml, wherein anatase TiO 2 Catalyst 0.15g, deionized water 40ml, adopting light source is 150W mercury light lamp, feeds carbon dioxide, and the purity of this carbon dioxide gas sample is 99.5% (produced by Beijing Hepu Beifen Gas Co., Ltd.). Put carbon dioxide into the above-mentioned transparent high-pressure sapphire kettle, turn on the light source and adjust the magnetic stirring speed to 15r / min to start the photocatalytic reaction, keep the reaction pressure at 2.0MPa, and the reaction temperature at 4.6°C. Lighting time was controlled as 2h, 4h, 6h, 8h respectively.

[0026] It was determined that the...

Embodiment 2

[0030] Experiment B was implemented in a photocatalytic reactor to realize the photocatalytic reaction of hydrates under heterogeneous equilibrium conditions.

[0031] The conditions of experiment B are: the reaction kettle is a fully transparent high-pressure sapphire kettle (produced by DBROBINSON, Canada), with a volume of 78ml, and anatase TiO 2 Catalyst 0.15g, deionized water 40ml, adopting light source is 150W mercury light lamp, feeds carbon dioxide, and the purity of this carbon dioxide gas sample is 99.5% (produced by Beijing Hepu Beifen Gas Co., Ltd.). Start the magnetic stirring motor at a speed of 15r / min, keep the reaction pressure at 2.0MPa, control 4°C to hydrate carbon dioxide to obtain a hydrate slurry, and maintain the multiphase equilibrium state. At this time, keep the temperature and pressure constant, and turn on the light source to start the light. Catalytic reaction, the light time is 2h, 4h, 6h, 8h respectively.

[0032] It was determined that the liq...

Embodiment 3

[0036] Experiment C was implemented in the photocatalytic reactor to realize the photocatalytic reaction under the condition of slow decomposition of hydrate.

[0037] The condition of experiment C is that the reaction kettle is a fully transparent high-pressure sapphire kettle (produced by DBROBINSON, Canada), with a volume of 78ml, and anatase TiO 2 Catalyst 0.15g, deionized water 40ml, adopting light source is 150W mercury light lamp, feeds carbon dioxide, and the purity of this carbon dioxide gas sample is 99.5% (produced by Beijing Hepu Beifen Gas Co., Ltd.). Start the magnetic stirring motor at a speed of 15r / min, keep the reaction pressure at 2.0MPa, first control at 4°C to generate hydrate slurry, and reach multiphase equilibrium, keep the pressure at 2.0MPa, raise the temperature to 4.6°C, turn on the light source, The photocatalytic reaction is carried out in the state of slow decomposition, and the light time is 2h, 4h, 6h, 8h respectively.

[0038] It was determin...

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Abstract

The invention provides a method for the photocatalytic reduction of carbon oxide. The method comprises the steps of: firstly, mixing the carbon oxide with water and stirring the mixture to generate hydrate slurry; when the balance of the reaction system is maintained or the hydrate begins to decompose slowly with the system parameters adjusted, starting a photocatalytic reaction to reduce the carbon oxide in the presence of a catalyst. In the invention, by introducing the step of generating the hydrate slurry, the concentration of the carbon oxide in the reaction area is improved, the problem of poor absorption effect of the carbon oxide and a photocatalyst in the convectional process of reducing the carbon oxide in the presence of the photocatalyst is solved, and the efficiency of the photocatalytic reaction is improved.

Description

technical field [0001] The invention relates to a method for photocatalytic reduction of carbon dioxide, in particular to a method for improving the adsorption power of photocatalytic reaction by decomposing carbon dioxide hydrate to release high-concentration carbon dioxide, thereby improving the conversion efficiency of carbon dioxide. Background technique [0002] Carbon dioxide emitted by various means, except partly absorbed by plants, is emitted into the atmosphere in large quantities at any time. It has become the main greenhouse gas that plagues the earth and is the main cause of the "greenhouse effect". On the other hand, carbon dioxide is also an important carbon resource. Converting and fixing it is not only beneficial to alleviate the greenhouse effect, but also can obtain organic fuels or basic chemical raw materials. Therefore, the catalytic reduction of carbon dioxide to synthesize organic chemicals has great significance for environmental protection and energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/62C01B31/18C07C1/02C01B32/40
CPCY02P20/151
Inventor 陈光进唐绪龙孙长宇杨兰英周伟
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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