低碳化学与化工2025，Vol.50Issue(7)：1-9,9.DOI:10.12434/j.issn.2097-2547.20240471
Ce掺杂对CuZnAl催化剂CO2加氢合成甲醇催化性能的影响
Effect of Ce-doped CuZnAl catalyst on catalytic performances of CO2 hydrogenation to methanol
摘要
Abstract
A large amount of carbon dioxide emissions caused by the use of fossil fuels have caused a series of environmental problems.Therefore,the thermal catalytic conversion of CO2 to methanol by CuZnAl catalyst is a effective way to reduce CO2 emission,but the catalytic performance of the catalyst still needs to be improved.CZACex catalysts with different Ce doping amounts(mass fraction)were prepared by in situ co-precipitation method,and CZA-5%Ce was prepared by impregnation method.The effects of different Ce doping methods on the physicochemical properties of the catalysts were studied.The physicochemical of the catalyst and the mechanism of Ce were investigated by XRD,N2 adsorption/desorption,H2-TPR and XPS.The results show that Ce doping can provide abundant oxygen vacancies,which can effectively promote CO2 conversion and improve CO2 conversion rate.Different doping methods lead to significant differences in the internal texture properties and Ce interaction forms of catalysts.Doping Ce by impregnation method can enhance the interaction between Ce species and Cu species,which is more conducive to the formation of oxygen vacancies and Ce3+,so that CZA-5%Ce has the best catalytic performance.Under the conditions of 250℃,3 MPa and V(H2):V(CO2)=3:1,the CO2 conversion rate,methanol selectivity and methanol space-time yield of CZA-5%Ce is 15.63%,36.35%and 83.35 mg/(mL·h),respectively.关键词
CO2加氢/甲醇/CuZnAl催化剂/Ce掺杂/氧空位Key words
CO2 hydrogenation/methanol/CuZnAl catalyst/Ce doping/oxygen vacancies分类
化学化工引用本文复制引用
李炆轩,王斌,李晶,郭建平,温月丽,黄伟..Ce掺杂对CuZnAl催化剂CO2加氢合成甲醇催化性能的影响[J].低碳化学与化工,2025,50(7):1-9,9.基金项目
北京建筑材料科学研究总院有限公司企业横向项目(18005059-ZS02-2022-0041). （18005059-ZS02-2022-0041）
