A method for improving catalytic oxidation activity of vocs catalyst

Abstract

A method for improving the catalytic oxidation activity of a VOCs catalyst. An alloy catalyst prepared by a flame spray pyrolysis method undergoes steps such as high temperature reduction and acid etching, so as to significantly improve the catalytic oxidation activity of the catalyst. A catalyst carrier is an oxide or simple substance which is not dissolved by acid, and an active component is an alloy formed of Pt or / and Au and at least one metal which may be dissolved by acid. The metal which may be dissolved by acid may be partially or completely etched away during the acid etching. Due to the porous structure of the etched alloy, the contact area between the active component and a reactant is increased, and a mass transfer process is intensified, thereby improving the catalytic oxidation activity of the catalyst. The method process for improving the activity of the supported catalyst is simple, the process is continuous and controllable, and scaled-up production is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and relates to a method for improving the activity of a VOCs catalytic oxidation catalyst. Specifically, the alloy catalyst powder prepared by the flame spray pyrolysis method was passed through high temperature H 2 The treatment methods of reduction and acid etching in the atmosphere can improve the porosity of the active components, enhance the mass transfer and heat transfer process, and reduce the working temperature of catalytic reactions such as VOCs catalytic oxidation, thereby improving the catalytic oxidation activity of the catalyst. Background technique [0002] Benzene series (benzene, toluene, xylene, styrene, etc.) are a class of volatile organic pollutants (VOCs) with a wide range of sources, and are one of the main pollutants in the air (especially in the indoor environment). Long-term or short-term exposure to The environment of benzene series will cause serious har...

AI Technical Summary

Problems solved by technology

[0004] Precious metal catalysts such as Pt and Pd have excellent catalytic activity, long service life and wide application range, but due to limited resources, the cost of use is high, which limits their large-scale sustainable application.

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