Cr/CeO_2体系及其对乙烷脱氢反应催化性能的研究  

A Study on Cr/CeO_2 Catalysts and Their Catalytic Performance for Dehydrogenation of Ethane

作　　者：葛欣[1] 孙清[1] 沈俭一[1] 

机构地区：[1]南京大学化学化工学院,南京210093

出　　处：《无机化学学报》2004年第8期987-990,共4页Chinese Journal of Inorganic Chemistry

基　　金：国家科技部973项目(No.G1999022408);国家自然科学基金项目(No.20233040);南京大学现代分析中心测试基金资助项目。

摘　　要：The dehydrogenation reaction of ethane over Cr/CeO2 catalysts in presence of CO2 was studied with fixed-bed micro-reactor. The Cr/CeO2 catalysts of different Cr loading have been synthesized using impregnation techniques. The Cr/CeO2 system has already been found to be active and selective in the reaction at around 740 ℃. The function of carbon dioxide is to remove coke and hydrogen to accelerate dehydrogenation of ethane. The results of catalysts characterizations indicated that Cr3+ and Cr6+ occurred on the surface of the catalysts. The 1.2 mmol Cr/100m2 CeO2 catalyst sample with a monolayer dispersion of Cr on CeO2 support showed a stronger surface acidity and a maximum yield of ethylene of about 35.5% at 36.6% conversion of ethane.The dehydrogenation reaction of ethane over Cr/CeO2 catalysts in presence Of CO2 was studied with fixed-bed micro-reactor. The Cr/CeO2 catalysts of different Cr loading have been synthesized using impregnation techniques. The Cr/CeO2 system has already been found to be active and selective in the reaction at around 740 degreesC. The function of carbon dioxide is to remove coke and hydrogen to accelerate dehydrogenation of ethane. The results of catalysts characterizations indicated that Cr3+ and Cr6+ occurred on the surface of the catalysts. The 1.2 mmol Cr/100m(2) CeO2 catalyst sample with a monolayer dispersion of Cr on CeO2 support showed a stronger surface acidity and a maximum yield of ethylene of about 35.5% at 36.6% conversion of ethane.

关 键 词：氧化铈负载铬催化剂 乙烷 脱氢反应 催化性能 乙烯 

分 类 号：O623.121[理学—有机化学] O643.36[理学—化学]