Cordierite matrix catalyst used for preparing synthesis gas by reforming methane and carbon dioxide and preparation method thereof

Abstract

The invention relates to a cordierite matrix catalyst used for preparing synthesis gas by reforming methane and carbon dioxide and a preparation method thereof. In the method, cellular cordierite is taken as the matrix of the catalyst, and the mixture of metallic oxide sosoloid NixMg(1-x)Al2O4 and CoxMg(1-x)Al2O4 is taken as active components and a carrier. The preparation method comprises the following steps of: processing the cellular cordierite in a salpeter solution, then washing and drying to obtain a cordierite matrix; preparing the cobalt nitrate, nickel nitrate, magnesium nitrate and aluminium nitrate into a solution according to the different contents of the catalyst, dropwise adding ammonia, and stirring to form a precipitation solution; and finally placing the cordierite and precipitation solution together into an autoclave and then placing the autoclave in a muffle furnace, then carrying out crystallization, drying and roasting to obtain the cordierite matrix catalyst. In the invention, an in-situ synthesis method is used, and the preparation process is simple; the prepared catalyst has a coating layer which is firmly combined with the matrix, and is applied to carbonyl synthesis; and in the synthesis chemical process of F-T, the catalyst has low bed pressure and good thermostability and the active component Ni is dispersed highly and has small possibility of sintering.

Description

technical field [0001] The present invention is related to the catalyst and the preparation method thereof for the reforming of methane and carbon dioxide to produce synthesis gas. Further, it is a kind of catalyst matrix with honeycomb cordierite; with metal oxide solid solution Ni x Mg 1-x al 2 o 4 and Co x Mg 1-x al 2 o 4 The mixture is an active component and a carrier; a cordierite-based catalyst for methane carbon dioxide reforming to synthesis gas and a preparation method thereof are prepared by an in-situ synthesis method. Background technique [0002] The proportion of natural gas in the world's energy structure is increasing day by day, and methane and carbon dioxide are two major greenhouse gases. The process of comprehensively utilizing natural gas and carbon dioxide to reform and produce synthesis gas is an effective way to utilize methane and carbon dioxide. This process produces H in syngas 2 The / CO ratio is about 1, which can be directly used as raw...

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Problems solved by technology

At the same time, noble metal catalysts and nickel-based catalysts are also limited in application due to their high price and easy carbon deposition and deactivation.

[0004] In recent years, some monolithic catalysts have been prepared using metal as a substrate (Ji Shengfu and other patents, a metal-supported catalyst for reforming methane and carbon dioxide to produce synthesis gas and its preparation method, publication number: CN1939587A), but due to its large thermal expansion coefficient , and the catalyst coating is not well matched, which affects the interface bonding strength between the two. When subjected to frequent thermal shocks, the coating is easy to fall off, thus affecting the service life of the catalyst

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