Preparation of highly active and selective catalyst for hydrogenation of CO_2 generating methanol

A highly active and selective Cu-ZnO-Al2O3catalyst(denoted as RK-11)was prepared for hydrogenation of CO2 to afford methanol,and the catalytic performance of as-prepared RK-11 catalyst was evaluated.Results show that,when raw material gas consists of68.5% H2,2.0% CO,20.5% CO2,and 9.0% N2,while temperature,gas hourly space velocity,and pressure are 240℃,GHSV =6 000h-1,and 8.0MPa,respectively,the conversion rate of CO2 and CO is as much as 35.2% and 39.8%.Relevant yield of methanol is as much as 686.1g/(L·h),and the selectivity of methanol product is as much as 99.3%.