Three-dimensional ordered mesoporous NM-Al catalyst as well as preparation method and application thereof

Abstract

The invention discloses a three-dimensional ordered mesoporous NM-Al catalyst as well as a preparation method and application thereof, and belongs to the field of petrochemical engineering. Accordingto the catalyst as well as the preparation method and application thereof, the technical defects in the prior art that pore structures of a noble metal catalyst are wide in distribution, the pore passage connectivity is poor, the number of dead pore passages is large, the specific surface area is small, the active component is poor in dispersion and the like can be overcome. The catalyst is prepared from an active component, an auxiliary agent and a catalyst carrier, wherein the active component is a noble metal precursor solution, noble metal is one selected from Pt, Pd and Rh, the content ofthe noble metal is 0.05-0.5 wt%, the auxiliary agent is one or more selected from CeO2, La2O3, Ag2O, MnO and CoO, the content of the auxiliary agent is 1-30 wt%, and the catalyst carrier is aluminumisopropoxide. The prepared catalyst has the advantages of being high in reaction activity and long in service life. The catalyst has very high reaction activity on volatile organic compounds in a refined oil product storage tank.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a catalyst, a preparation method and an application, in particular to a three-dimensional ordered mesoporous NM-Al catalyst, a preparation method and an application. Background technique [0002] The disorderly emission of volatile organic compounds (VOCs for short) has aroused great concern, because VOCs are easily absorbed by the skin and mucous membranes and cause harm to the human body. At the same time, many components in VOCs, such as benzene and toluene, are carcinogenic, teratogenic, and mutagenic. These substances interfere with the human endocrine system and have genotoxicity. Serious consequences such as coma and death pose a threat to human life and health, human survival and reproduction, and environmental safety. As a major emission source of VOCs, VOCs produced by refineries account for about 30% of the total. Therefore, my country has revised and implemented n...

AI Technical Summary

Problems solved by technology

However, noble metal catalysts also have some disadvantages

The carrier of common noble metal catalysts is alumina (patent CN 103191733B), and its pore structure distribution is wide, the pores are not connected and there are many dead pores, and the specific surface area is relatively small. poor dispersion

In addition, the patent CN 104138756A reports the use of molecular sieves as carriers to prepare noble metal catalysts. The carrier molecular sieves have a relatively concentrated pore structure distribution and a large specific surface area, but molecular sieves contain strong acidity, which can easily cause VOCs to coke and generate carbon to block the pores and hinder the catalytic reaction.

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