A kind of diene selective hydrogenation catalyst and its preparation method and application

Abstract

A selective hydrogenation catalyst for alkadiene. A carrier of the catalyst is a carboxyl-functionalized step hole FZIF-8, an active component is palladium, and the content of the active component ranges from 0.1% to 10% on the basis of the total weight of the carrier of the catalyst. A method for preparing the catalyst comprises: mixing and crystallizing raw materials, and conducting extraction and drying to obtain an FZIF-8 carrier, and making palladium immerse the carrier, so as to obtain the catalyst. Uses of the catalyst in a selective hydrogenation reaction for alkadiene are also provided. A step hole structure is formed in the carrier of the catalyst, so that carboxyl groups have accessibility, and the active components and the carboxyl groups can mutually interact; the carboxyl groups are contained in the carrier of the catalyst, and can anchor the active components, so that high dispersion of the active components is achieved, agglomeration and drain of the active components during the reaction are prevented, and the catalyst has high activity.

Description

technical field [0001] The invention relates to a diolefin selective hydrogenation catalyst, a preparation method and application thereof, and belongs to the technical field of catalyst preparation. Background technique [0002] The 21st century is a new era of developed economy and clean environment. The research and development of environmentally friendly clean fuels is one of the most important research topics in green chemistry. [0003] In recent years, the problem of air pollution has become increasingly prominent, and the problem of smog has become more and more serious. China's smog standard was officially implemented on January 1, 2013. However, since 2013, the central and eastern regions of China have been hit by smog. About 7 times the average concentration limit. PM2.5 has increasingly become the focus of public attention. In my country's energy consumption, coal and oil account for about 90%. It is generally believed that coal and oil contribute the most to m...

AI Technical Summary

Problems solved by technology

The active components of conventional catalysts are easy to agglomerate and lose during the reaction process, resulting in a low conversion rate of the hydrogenation catalyst. At the same time, diolefins are easily hydrogenated to form alkanes, resulting in low selectivity of the hydrogenation catalyst, resulting in the generation of a large amount of alkanes, causing serious loss of octane

In order to solve these problems, researchers have developed a series of catalysts for the selective hydrogenation of diolefins in order to increase the hydrogenation conversion rate of the catalyst while improving its hydrogenation selectivity, but the effect is not ideal

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