Catalytic combustion active ingredient highly-dispersed catalyst and preparation method thereof

Abstract

The present invention discloses a catalytic combustion active ingredient highly-dispersed catalyst and a preparation method thereof. The catalyst M-CeO2 / SiO2 comprises noble metal M, aid CeO2, and carrier SiO2. The catalyst M-CeO2 / SiO2 is prepared as follows: an oily dispersing agent is added into a mixed solution containing a concentration of a noble metal precursor and cerium nitrate, then the carrier SiO2 is added, and equivalent-volume impregnation and aging is performed for more than 6 hours; and after high-temperature treatment by heating or low temperature plasma treatment in an air atmosphere under a certain airspeed for 0.5 to 5 hours, the mixture is placed in hydrogen atmosphere under a certain airspeed for high-temperature treatment by heating or low temperature plasma treatment for 0.5 to 5 hours. The preparation process is simple, the catalyst M-CeO2 / SiO2 is prepared by adding of the oily dispersing agent and low temperature plasma treatment, and the catalyst M-CeO2 / SiO2 has high catalytic activity of catalytic combustion reaction of volatile organic compounds at low temperature. The whole process is low in energy consumption, and the removal rate of volatile organic compounds at low temperature can reach more than 95%.

Description

technical field [0001] The invention relates to the purification treatment of volatile organic compounds, in particular to a highly dispersed active component catalyst for catalytic combustion and a preparation method thereof. Background technique [0002] With the continuous rapid development of our society and economy, environmental problems are becoming more and more serious, so environmental pollution and its control technology have also attracted much attention. Volatile organic compounds (Volatile Organic compounds, referred to as VOCs) is an important air pollution gas, which mainly comes from the waste gas emitted by industries such as coatings, flavors and fragrances, pharmaceuticals, petrochemicals, printing or painting. VOCs not only cause carcinogenic, teratogenic and mutagenic hazards to organisms, but are also one of the important factors in the formation of photochemical pollution, seriously endangering human body functions and destroying the health of the ear...

AI Technical Summary

Problems solved by technology

Although the traditional impregnation process can disperse the noble metal precursor solution on the carrier, the dispersion is often uneven; the high-temperature calcination and high-temperature reduction process will also lead to the agglomeration of active components, resulting in an increase in the particle size of the noble metal and a decrease in the dispersion.

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