摘要
采用浸渍法制备不同CeO_2负载量的xCeO_2/高岭土催化剂,采用XRD、N_2吸附-脱附、H_2-TPR和XPS等对催化剂物化性质进行表征。将xCeO_2/高岭土催化剂应用于丙烷氧化脱氢反应中,考察CeO_2负载量对丙烷氧化脱氢反应的影响,同时对催化剂进行原位电导测试。结果表明,CeO_2负载质量分数8%时,CeO2/高岭土催化剂的催化性能最好,500℃时,丙烷转化率为17.92%。在氧-丙烷-氧+丙烷连续变化的不同气氛下均显示了氧化还原可逆性。
A series of xCeO_2/kaolin catalysts of different CeO_2 contents were prepared by impregnation method.The as-prepared catalysts were characterized by XRD,N_2 adsorption-desorption,H_2-TPR,XPS,and their catalytic performances for the oxidative dehydrogenation of propane to propene were investigated to determine the effects of CeO_2 contents,meanwhile in situ electric conductivity of catalysts were measured.The results showed that the optimized catalyst with 17.92% conversation of propane at 500 ℃was 8% CeO_2/kaolin catalysts.The redox was reversible under atmospheres of oxygen propane oxygen +propane varying continuously.
出处
《工业催化》
CAS
2017年第12期38-43,共6页
Industrial Catalysis
基金
国家重点基础研究发展计划(973计划)前期研究专项(2014CB460609)
内蒙古自治区自然科学基金(2016MS0212)
内蒙古自治区高等学校科学研究项目(NJZZ16042)
内蒙古自治区水环境安全协同创新培育中心资助项目(XTCX003)
关键词
催化化学
CEO2
高岭土
丙烷氧化脱氢
丙烯
catalytic chemistry
CeO2
kaolin
oxidative dehydrogenation of propane
propene
