燃料化学学报（中英文）2024，Vol.52Issue(8)：1095-1102,8.DOI:10.1016/S1872-5813(24)60438-X
La修饰提高CO2制甲醇催化剂Cu/ZnO/Al2O3的稳定性
Promoted stability of Cu/ZnO/Al2O3 catalysts for methanol production from CO2 hydrogenation by La modification
摘要
Abstract
Deactivation of Cu/ZnO/Al2 O3 catalysts in CO2 hydrogenation to methanol reaction is one of the main reasons limiting their application.We synthesized a series of La modified Cu/ZnO/Al2 O3 catalysts by adding different contents of La to improve the stability.In the 100 h short-term stability test at 200℃under 3 MPa with a GHSV of 12000 mL/(g·h),the unmodified Cu/ZnO/Al2 O3 catalysts degraded obviously over 100 h.In sharp contrast,the stability was significantly promoted by the addition of La.The best activity was achieved with 5%La added samples(4%CO2 conversion and 85%methanol selectivity),which also showed impressive stability over 1000 h except about 17%deactivation during the initial 190-220 h.The X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)results revealed that the addition of 5%La improved the dispersion of Cu and Zn,inhibited the sintering of Cu,stabilized the Cu0/+species and retarded oxidation of Cu in catalysts,which attributed to the high stability of the catalysts.关键词
Cu/ZnO/Al2O3/La助剂/稳定性Key words
Cu/ZnO/Al2 O3/La promoter/stability分类
化学化工引用本文复制引用
牛萌萌,姜雅楠,张弦,张翠娟,刘源..La修饰提高CO2制甲醇催化剂Cu/ZnO/Al2O3的稳定性[J].燃料化学学报（中英文）,2024,52(8):1095-1102,8.基金项目
The project was supported by National Natural Science Foundation of China(21872101,21962014),the Key Research and Development Program of Ordos(YF20232313),Ordos Industrial Innovation Talent Team and the Regional Cooperation Program of Shanxi(202204041101029).国家自然科学基金(21872101,21962014),鄂尔多斯市重点研发计划(YF20232313)和鄂尔多斯市产业创新人才团队和山西省区域合作项目(202204041101029)资助 （21872101,21962014）
