Catalyst for production of methanol by CO2 hydrogenation

The invention discloses a catalyst for production of methanol by CO2 hydrogenation. The invention is intended to overcome the problems of low CO2 conversion ratio and low methanol selectivity in a CO2 hydrogenation methanol synthesis process and studies a catalyst with Cu, ZnO, ZrO2 and graphene oxide (GO) as main components. The content, calculated in mass ratio, namely GO/Cu-ZnO-ZrO2, is (0.04-0.16)/1, and the catalyst is prepared by adopting a parallel flow coprecipitation method. The preparation process is simple, conditions are easy to control, and repeatability is good. The catalyst disclosed by the invention has the advantages of easily adjustable and variable composition and structure, larger specific surface area, dispersed active components and good catalytic activity. In a CO2 hydrogenation methanol synthesis reaction, the CO2 conversion ratio and methanol selectivity are improved, CO2 emission reduction is achieved, and the catalyst is significant for solving increasingly serious environmental problems.