摘要
采用共沉淀法制备了湿式氧化降解苯酚的TiO2-CeO2催化剂,测定了反应过程中不同反应时间的COD去除率,结果表明,当Ti、Ce摩尔比为3∶1时,在150℃、总压5MPa(其中氧分压4.5MPa)时,所制备的催化剂活性最高,反应90分钟COD去除率可以达到71%.对催化剂进行了比表面积、XRD和XPS测试,结果表明,高效的催化剂具有较多的活性位、催化剂粉末体系Ce的变价特性以及大量的表面吸附氧.
TiO2-CeO2 catalysts for wet air oxidation of phenol were prepared by coprecipitation. The most efficient catalyst of C3： 1 was obtained by measuring the COD removals of phenol in the reaction. At the temperature 150℃ and the total pressure 5 MPa（oxygen partial pressure of 4.5 MPa）, the COD removal reached 71% in 90 minutes. Furthermore, investigations of various catalysts by BET test, XRD, XPS analysis showed that lots of active points, the diverse chemical valence states of cerium in the catalysts and plentiful surface adsorptive oxygen enhanced the activity of catalysts.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2005年第5期338-341,共4页
Journal of Molecular Catalysis(China)
基金
国家"十五"
863计划资助项目(编号:2002AA601260)
中国博士后科学基金
