摘要
采用浸渍法制备了不同Cr含量的Cr/Cu-Ce催化剂,通过N2O滴定、H2-TPR和XPS等表征,对其结构、性质和催化性能进行了探究。结果表明,Cr助剂会改变Cu-Ce催化剂的铜比表面积、CuO还原温度以及氧空穴含量。其中,添加3%Cr的催化剂的Cu比表面积较大,CuO还原温度较低,氧空穴较多,进而表现出优良的催化性能。当反应温度为533 K,n(水)∶n(甲醇)=1.2∶1,甲醇和水的进料量为0.072 mL/min时,其催化效率达100%,重整气体组分中的CO体积分数为0.15%。与未掺杂Cr助剂的催化剂相比,其催化效率提高了10%,重整气体组分中的CO体积分数降低了0.34%。
Cr/Cu-Ce catalyts with different Cr contents were prepared by impregnation method,and their structures,properties and catalytic performance were investigated using N2O titration,H2-TPR and XPS techniques.It is found that the Cr doping changs the specific surface area of copper,the reduction temperature of CuO and oxygen vacancies of the Cu-Ce catalysts.In addition,the catalyst with 3%Cr addition has larger Cu specific surface area,lower CuO reduction temperature and more oxygen vacancies,thus exhibits excellent catalytic performance.The catalytic efficiency reaches 100%and CO volume fraction in outlet gas is 0.15%when the reaction temperature is 533 K,n(water)∶n(methanol)is 1.2∶1 and the feeding rate of methanol and water is 0.072 mL/min.Compared with the un-doped Cr catalyst,the catalytic efficiency increases by 10%and the volume fraction of CO in the outlet gas decreases by 0.34%.
作者
王东哲
王丽宝
张磊
庆绍军
韩蛟
张财顺
高志贤
冯旭浩
WANG Dong-zhe;WANG Li-bao;ZHANG Lei;QING Shao-jun;HAN Jiao;ZHANG Cai-shun;GAO Zhi-xian;FENG Xu-hao(College of Chemistry,Chemical Engineering and Environmental Engineering,Liaoning Shihua University,Fushun 113001,China;Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;No.3 Refinery of Fushun Petrochemical Company of CNPC,Fushun 113001,China)
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2020年第5期619-625,I0007,共8页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(21376237)
辽宁省教育厅科学研究经费项目(L2019038)
辽宁省自然科学基金面上项目(2019-MS-221)
辽宁省自然科学基金指导计划项目(2019-ZD-0371)资助。
