Preparation method of catalyst film for decomposition of hydrogen phosphide gas

A catalyst film and phosphine technology, applied in the direction of physical/chemical process catalysts, separation methods, chemical instruments and methods, etc., can solve the problems of increasing the pressure drop of gas delivery, not using industrial scale applications, and low gas flux , to achieve the effects of increasing contact opportunities, reducing catalyst costs, and increasing gas flux

Inactive Publication Date: 2018-05-22
天津格林凯恩化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above catalysts are all in powder form, which will not only increase the pressure drop of gas delivery, but also the gas flux is low, which does not make use of industrial scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for preparing a catalyst membrane for decomposing phosphine gas, comprising the following steps: 1) After mixing 150 mL of tetrabutyl titanate with 20 mL of ethanol, adding 5 g of N-isopropylacrylamide to form a mixed solution, and Spread the mixed solution on the surface of quartz glass, and then drop 50 ml of 5% polyethylene glycol ethanol aqueous solution (volume ratio 1 / 1) with a pH of 4 to each part of the above mixed solution, and let it stand for 7 Day, release the mold to form a titanium dioxide gel film. 2) The titanium dioxide gel film obtained in 1) was immersed in a mixed solution of 0.8%, 0.4% nickel nitrate, and ferric nitrate for 6 h and pulled at a uniform speed, then dried at 80 °C for 6 h, and then calcined at 500 °C for 6 h , and finally reduced under hydrogen at 200°C for 3 h to obtain Ni-Fe 3 o 4 / TiO 2 Porous membrane catalyst. Wherein Ni content is 0.5%, Fe 3 o 4 The content is 0.2%.

[0016] The obtained catalyst is used for the c...

Embodiment 2

[0018] A method for preparing a catalyst membrane for decomposing phosphine gas, comprising the following steps: 1) After mixing 250 mL of tetrabutyl titanate with 20 mL of ethanol, adding 8 g of N-isopropylacrylamide to form a mixed solution, and Spread the mixed solution on the surface of quartz glass, and then drop 50 ml of 5% polyethylene glycol ethanol aqueous solution (volume ratio 1 / 1) with a pH of 4 to each part of the above mixed solution, and let it stand for 7 Day, release the mold to form a titanium dioxide gel film. 2) The titanium dioxide gel film obtained in 1) was immersed in a mixed solution of 0.9%, 0.3% nickel nitrate and ferric nitrate for 6 h and pulled at a uniform speed, then dried at 80 °C for 6 h, and then calcined at 500 °C for 6 h , and finally reduced under hydrogen at 200°C for 3 h to obtain Ni-Fe 3 o 4 / TiO 2 Porous membrane catalyst. Wherein Ni content is 0.3%, Fe 3 o 4 The content is 0.05%.

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Abstract

A preparation method of a catalyst film for decomposition of hydrogen phosphide gas comprises that tetrabutyl titanate, N-isopropylacrylamide, glutaraldehyde, polyethylene glycol, nickel nitrate and iron nitrate as precursors are made into a mixed solution, and through the processes of film laying on quartz glass through a sol-gel method, stripping, impregnating, calcining, hydrogen reduction andthe like, a porous titania film loaded with Ni and Fe3O4 catalysts is formed. The method has the advantages that the catalytic carrier is a porous film Ni-Fe3O4/TiO2 catalyst having enriching and catalyzing functions; the catalyst active center content is low, and the catalyst cost can be reduced effectively; with the porous film structure, the gas flux is greatly improved and the contact opportunity of hydrogen phosphide to catalytic active centers is increased, so the catalytic efficiency is increased and the catalyst film is suitable for industrial scale application.

Description

technical field [0001] The invention relates to a method for preparing a catalyst membrane for decomposing phosphine gas. The invention belongs to the technical field of industrial tail gas pollutant emission control. Background technique [0002] Phosphate chemical enterprises will produce a large amount of tail gas containing phosphine in the production process. If it is not effectively controlled, it will become an important source of environmental air pollution in many cities. At the same time, CO gas in the tail gas cannot be obtained because of phosphine. Effective use is a great waste of resources. The development of efficient phosphine treatment technology is an important task for phosphorus chemical enterprises to achieve sustainable development. [0003] Catalytic decomposition of phosphine to remove it from tail gas is one of the effective ways. In the patent CN101301617A, a supported catalyst for preparing elemental phosphorus by decomposing phosphine is repor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01D53/86B01D53/46
CPCB01J23/755B01D53/8671B01D2255/20707B01D2255/20738B01D2255/20753B01D2257/55B01J35/065
Inventor 不公告发明人
Owner 天津格林凯恩化工科技有限公司
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