Technical status of carbon dioxide hydrogenation to methanol and research progress of catalysts

HE Nieyan; LI Xueqin; LIU Peng; CHEN Zhuo; ZHENG Binguo; LEI Tingzhou

doi:10.13226/j.issn.1006-6772.23122604

Abstract：The combustion of fossil fuels emits a large amount of greenhouse gases.The study of carbon dioxide(CO2)emission reduction and utilization has become a hot spot of worldwide concern and an urgent problem to be solved.The synthesis of methanol from CO2 is an effective way to achieve large-scale low-carbon emission reduction and clean energy reproduction.However,there are still some technical problems in the process of CO2 conversion of high value-added products,such as unclear reaction active sites and high catalyst cost.This paper takes the synthesis route of CO2 as raw material into high value-added chemicals as the starting point,introducing the technical route and development status of methanol synthesis from CO2 hydrogenation,and summarizes the factors affecting its selectivity in methanol synthesis process.It is found that catalyst is one of the important factors affecting the process of CO2 hydrogenation to methanol and further compares the characteristics of different catalysts.In particular,copper-based catalysts have good catalytic activity for the synthesis of high yield and high purity methanol.Finally,it analyzes the mechanism and existing problems of copper-based catalysts in methanol synthesis in detail,and the changes in the activity,selectivity and stability of the catalyst were analyzed from three aspects:Active components,carriers and additives.In order to provide a theoretical reference for the preparation and screening of copper-based catalysts with high activity and low cost for CO2 hydrogenation to methanol,it also analyzes respectively the effects of active components,supports and additives on the activity,selectivity and stability of the catalysts.