High-selectivity catalyst for naphthalene hydrogenation reaction for preparing tetrahydronaphthalene and preparation method thereof

Abstract

The invention discloses high-selectivity carbide catalyst for naphthalene hydrogenation reaction for preparing tetrahydronaphthalene and a quick microwave preparation method thereof, belonging to the technical field of catalyst material application and preparation. The method comprises the steps of: fully grinding complex compounds containing relevant metals and carriers, or supporting the complex compounds containing the relevant metals onto the surfaces of carriers through a solution impregnation method and conducting microwave pyrolysis in inert gas to form the supported carbide catalyst. The invention provides the high-efficiency carbide catalyst with 100 percent selectivity aiming at the naphthalene hydrogenation reaction for preparing the tetrahydronaphthalene and a simple, convenient, quick, environmental-friendly and energy-saving preparation method thereof. The prepared carbide particles are evenly dispersed on the carriers, so that the situation of surface carbon deposition is avoided. The contradiction between high catalyst selectivity and high cost is successfully avoided, and therefore the high-selectivity carbide catalyst and the preparation method thereof have promising industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of application and preparation of catalytic materials, and relates to a carbide catalytic material with high selectivity for the reaction of hydrogenation of naphthalene to prepare tetrahydronaphthalene and a preparation method thereof, in particular to a rapid microwave preparation of carbide catalytic materials method, and the prepared carbide catalytic material is used in reactions such as hydrogenation of naphthalene to prepare tetrahydronaphthalene. Background technique [0002] The hydrogenation reaction of naphthalene is often used as a probe for the hydrogenation series of aromatics to study the mechanism of the reaction, which has important theoretical value and guiding significance in the field of petroleum refining. At the same time, the two products of naphthalene hydrogenation reaction: tetrahydronaphthalene and decahydronaphthalene are industrial products with rich practical value. Tetrahydron...

AI Technical Summary

Problems solved by technology

The most widely used single-source precursor is molybdenum-hexamethylenetetramine complex, and it has been reported that molybdenum carbide can be prepared by using traditional temperature-programmed pyrolysis (Chem.Mater., 2007, 19, 1801-1807), but in addition to the molybdenum-hexamethylenetetramine complex, a large amount of hexamethylenetetramine needs to be added during the preparation process, and the CH generated by pyrolysis of hexamethylenetetramine 4 As the carbon source of the carburizing process, from a microscopic point of view, the process is not a real single-source precursor one-step pyrolysis method, the diffusion direction of carbon atoms from the outside to the granular phase has not changed, and the prepared carbonized Molybdenum particles also have a certain degree of surface area carbon

Therefore, studying the preparation method of carbide catalytic materials with high specific surface area or high dispersion and no surface area carbon to make full use of the noble metal-like catalytic performance of carbide is an effective way to solve the contradiction that noble metals cannot meet industrial production.

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