Monolithic catalyst for catalytic oxidation of wet VOCs-containing tail gas and preparation method and application thereof

Abstract

The invention discloses a monolithic catalyst for catalytic oxidation of wet VOCs-containing tail gas. The catalyst comprises a cordierite honeycomb carrier, a composite zirconia coating doped with rare earth components and supported on the carrier, active components loaded on the coating, and hydrophobic components covering the surface of the catalyst. The invention further discloses a preparation method of the catalyst and application of the catalyst in catalytic oxidation of the wet VOCs-containing tail gas. The composite zirconia coating doped with the rare earth components, an active component coating and a hydrophobic component coating are sequentially prepared on the carrier through a step-by-step impregnation method. The rare earth components in the catalyst improve the oxygen supply capacity of the composite zirconia coating and the activity of the catalyst, and the hydrophobic components on the surface of the catalyst avoid the activity decrease of the catalyst and improve the water vapor resistance of the catalyst. The preparation method of the catalyst is simple and easy to achieve, and the catalyst has high catalytic efficiency and a wide use range and is suitable forcatalytic oxidation of the wet VOCs-containing tail gas at low temperature.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a monolithic catalyst for catalytic oxidation of wet VOCs and its preparation method and application. Background technique [0002] With the growth of my country's economy and the gradual acceleration of industrialization, air pollution has gradually intensified, seriously damaging our living environment, and problems such as smog have caused the whole society to pay attention to the environment. With the deepening of understanding of smog, people have realized that the emission of VOCs (volatile organic compounds) has increased, leading to various environmental problems, which have a great impact on the global environment and seriously affect human health and economy. develop. In this context, only controlling traditional pollutants can no longer meet people's higher requirements for the living environment. Therefore, the control of volatile organic co...

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Problems solved by technology

[0004] At present, there are few published literatures on wet VOCs gas catalysts, and there are even fewer research literatures on improving the performance of VOCs gas catalysts in wet gases by in-depth research on the preparation method, dispersion and carrier modification of wet VOCs gas catalysts , the development of wet VOCs gas catalysts has become an urgent problem to be solved

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