Preparation method of composite non-precious metal oxide catalytic combustion catalyst and application of prepared catalyst

Abstract

The invention belongs to the field of catalysts and in particular relates to a preparation method of a composite non-precious metal oxide catalytic combustion catalyst and an application of the prepared catalyst. The preparation method comprises the following steps: A, solution preparation, namely adding a soluble cobalt salt, a cerium salt, a lanthanum salt, a manganese salt and a copper salt into water, and uniformly mixing to obtain a solution; B, dipping, namely completely immersing a cordierite ceramic honeycomb carrier into the solution obtained in the step A, and taking out and airing the carrier; and C, coating the solution obtained in the step A onto the surface of the aired cordierite ceramic honeycomb carrier, drying and calcining, thereby obtaining the product. The preparationmethod is simple, and the prepared catalyst is high in activity, high in efficiency of catalytically combusting volatile organic compounds, low in transition temperature, excellent in stability, excellent in anti-poisoning property, long in service life, low in cost, wide in application range, zero in secondary pollution and recyclable.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a preparation method of a composite non-noble metal oxide catalytic combustion catalyst and an application of the prepared catalyst. Background technique [0002] VOCs (volatile organic compounds) refer to organic compounds with a saturated vapor pressure greater than 133.32Pa at normal temperature and a boiling point below 50-260°C at normal pressure, or any organic solid or liquid that can volatilize at normal temperature and pressure. [0003] Catalytic combustion of VOCs is a typical gas-solid catalytic reaction, the essence of which is to convert VOCs and O 2 react to produce harmless CO 2 and H 2 O, and the process of releasing the heat of reaction. [0004] [0005] VOCs catalytic combustion is flameless combustion at a temperature of 350°C. Compared with thermal combustion, it can simultaneously reduce energy consumption and emissions of secondary pollutants suc...

AI Technical Summary

Problems solved by technology

[0007] Precious metal catalysts are mainly palladium, platinum, rhodium and other noble metals as the main active substances. This type of catalyst is usually attached to the carrier, which has high activity and good selectivity. VOCs such as As are prone to poisoning (catalyst poisoning)

[0008] Common transition metal oxide catalysts include MgOx, CuOx, CoOx, etc., and these transition metal oxides are effective for CH 4 Both hydrocarbons and CO oxidation have catalytic activity, but the catalytic activity of benzene, cyclohexanone, styrene, etc. is not high. The advantages of transition metal oxide catalysts are cheap price and abundant resources. The disadvantage is that the catalytic activity is relatively single, only Can target specific part of volatile organic compounds with limited catalytic activity

[0009] Therefore, when the current catalyst is catalytically burning VOCs, the catalyst is easily poisoned, the conversion rate of VOCs is low, the cost is high, and the stability is poor.

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