Preparation method of catalyst for carbon dioxide hydrogenation methyl alcohol production

Abstract

The invention discloses a preparation method of a catalyst for carbon dioxide hydrogenation methyl alcohol production. The catalyst prepared through the method can sufficiently utilize the high specific surface area and the unique duct structure of mesoporous silicon dioxide, ultrahigh dispersion of active components is achieved, and generation of high-activity loci is promoted. The method comprises the following steps that 1, a polymer is weighed to be added into deionized water, stirring is performed to achieve complete dissolution; 2, concentrated hydrochloric acid, Cu(NO3)2 and Zn(NO3)2 solid powder are added, and heating and stirring are performed; 3, a silicon source is dropped in, and a precursor system solution is obtained; 4, sealing is performed for continuous stirring for 24-28h or longer, and the reaction solution is poured into a self-pressure reaction kettle for crystallization; 5, the crystallized solution is subjected to washing and suction filtering, and obtained filter cakes are dried; 6, the dried product is calcinated; 7, the calcinated product is placed into a tube furnace to be reduced in hydrogen airflow, and the catalyst for carbon dioxide hydrogenation methyl alcohol production is obtained.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a catalyst for hydrogenation of carbon dioxide to methanol. Background technique [0002] Methanol is an important chemical intermediate and an ideal liquid fuel additive. It is in great demand in industry. The process of carbon dioxide hydrogenation to methanol is one of the important sources of industrial methanol, and it can greatly increase the concentration of carbon atoms. utilization rate. For the hydrogenation of carbon dioxide to methanol process, the copper-zinc-based catalysts commonly used in industry are copper-zinc oxide bimetallic catalysts supported on alumina. The main preparation methods include sol-gel method, impregnation method and co-precipitation method. (1) The sol-gel method uses Na 2 CO 3 with Cu(NO 3 ) 2 , Zn(NO 3 ) 2 The prepared mixed solution reacts to form a transparent sol system, and then the obtained gel is dried,...

AI Technical Summary

Problems solved by technology

In the various processes of the preparation method of the prior art, it is difficult to adjust and control the loading of the active components, and it is difficult to achieve high dispersion of the loading of the active components on the carrier. The activity of the generated catalyst is usually limited, and the specific surface of the carrier is usually difficult to be fully utilized. , and cannot promote the formation of highly active sites in a targeted manner, and the catalytic efficiency is low