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Catalyst for decomposing formaldehyde and preparation method of catalyst

A catalyst and formaldehyde technology are applied in the field of catalysts for decomposing formaldehyde and their preparation, which can solve the problems of poor mechanical properties of catalyst carriers and low catalytic efficiency of catalysts, and achieve the effects of small particle size, promotion of oxidative decomposition and good mechanical strength.

Inactive Publication Date: 2019-05-24
ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a catalyst to solve the technical problems of low catalytic efficiency and poor mechanical properties of the catalyst carrier in the prior art

Method used

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  • Catalyst for decomposing formaldehyde and preparation method of catalyst
  • Catalyst for decomposing formaldehyde and preparation method of catalyst

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preparation example Construction

[0036] As another aspect of the present invention, a method for preparing a catalyst for decomposing formaldehyde is provided, comprising: a cleaning step of the cordierite honeycomb ceramic carrier: soaking the cordierite honeycomb ceramic carrier in an acid solution, and ultrasonically Drying after cleaning; preparation steps of subnano-scale noble metal particles: under the protection of the protective agent, use alcohol as a reducing agent to reduce the noble metal compound to sub-nano-scale noble metal particles to obtain a colloidal solution; preparation steps of the composite slurry: in the colloid Add oxygen storage metal oxide powder and polyethylene glycol into the solution and mix evenly to obtain a composite slurry; adsorption step: impregnate the cleaned cordierite honeycomb ceramic carrier in the composite slurry to make the subnano-scale noble metal particles and storage Oxygen metal oxide is adsorbed on the surface of the cordierite honeycomb ceramic carrier; dr...

Embodiment 1

[0048] In the preparation method of this embodiment, the cleaning step of the cordierite honeycomb ceramic carrier is firstly performed: soaking the cordierite honeycomb ceramic carrier in an acid solution, ultrasonic cleaning in deionized water, and drying, the acid solution is 10% by mass percentage nitric acid solution, the soaking time is 15min, the ultrasonic cleaning time in deionized water is 30min, the drying temperature is 50°C, and the drying time is 8h; As a reducing agent, the noble metal compound is reduced to sub-nanometer noble metal particles to obtain a colloidal solution. The protective agent is polyvinylpyrrolidone, the alcohol is methanol, and the noble metal compound is chloroplatinic acid. Dissolve polyvinylpyrrolidone in water, and 6mg of polyvinylpyrrolidone corresponds to 5ml of deionized water, correspondingly add 1ml of chloroplatinic acid solution with a concentration of 6g / L, add alcohol to the reaction solution at a volume ratio of alcohol to water...

Embodiment 2

[0050] In the preparation method of this embodiment, the cleaning step of the cordierite honeycomb ceramic carrier is firstly performed: soaking the cordierite honeycomb ceramic carrier in an acid solution, ultrasonic cleaning in deionized water, and drying, the acid solution is 20% by mass percentage nitric acid solution; soaking time is 30min; ultrasonic cleaning time in deionized water is 60min; drying temperature is 70°C, drying time is 14h; As a reducing agent, the noble metal compound is reduced to sub-nanometer noble metal particles to obtain a colloidal solution. The protective agent is polyvinylpyrrolidone, the alcohol is ethanol alcohol, and the noble metal compound is chloroplatinic acid. Dissolve polyvinylpyrrolidone in water, 10mg polyvinylpyrrolidone Corresponding to 10ml of deionized water, correspondingly add 5ml of chloroplatinic acid solution with a concentration of 12g / L, add alcohol to the reaction solution at a volume ratio of alcohol to water of 9:1, and r...

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Abstract

The invention provides a catalyst for decomposing formaldehyde and a preparation method of the catalyst. According to the catalyst for decomposing formaldehyde, cordierite honeycomb ceramic serves asa carrier, and sub-nano noble metal particles and an oxygen storage metal oxide are loaded on the carrier. The preparation method of the catalyst for decomposing formaldehyde comprises the steps of cleaning of the cordierite honeycomb ceramic carrier, preparation of the sub-nano noble metal particles, preparation of compound slurry, adsorption and drying and calcining. The catalyst carrier is loaded with the sub-nano noble metal particles, the particle size is small, the specific surface area is large, the number of catalytic sites is large, and the catalytic activity is high; the oxygen storage metal oxide is also loaded on the carrier so that oxygen in air can be captured, and formaldehyde oxidative decomposition can be promoted; the cordierite honeycomb ceramic serves as the carrier, sothat the catalyst has certain mechanical strength and an excellent pore structure. By means of the preparation method, the catalyst can be obtained.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a catalyst for decomposing formaldehyde and a preparation method thereof. Background technique [0002] With the improvement of living standards, people's requirements for the living environment are also continuously improved, especially higher requirements for air quality. According to research, modern people spend up to 80% of their time indoors. Therefore, how to ensure indoor air quality has become the focus of scientific research workers and product developers. [0003] Among the many air pollutants, formaldehyde, as the main pollutant, is extremely harmful to people's health. Therefore, how to decompose formaldehyde efficiently and greenly through catalytic decomposition has become the focus of scientific researchers and product developers. [0004] Currently, methods for treating formaldehyde include adsorption, photocatalysis, and catalytic oxidation. Among them, the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72B01J23/42B01J35/10
Inventor 黄勇吴稷鎏李丽孙明明李道远曹希传
Owner ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT
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