燃料化学学报2018，Vol.46Issue(5)：615-624,10.
CeO2-MnOx催化剂形貌对低浓度甲烷催化燃烧反应性能的影响
Morphological effect of CeO2-MnOxcatalyst on their catalytic performance in lean methane combustion
摘要
Abstract
Ship-like,oblate spheroid and nano sheet CeO2-MnOxmixed oxides were prepared by hydrothermal method and characterized by N2sorption, XRD, SEM, TEM, H2-TPR, Raman spectra and XPS. The relationship between the structure of CeO2-MnOxand their catalytic performance in lean methane combustion were then investigated. The results reveal that the catalytic performance of the mixed CeO2-MnOxoxide was greatly depended on its morphology. Among all of the samples, the mixed oblate spheroid CeO2-MnOxoxides with most oxygen vacancies, Ce3+content and surface active oxygen exhibited the highest activity in lean methane combustion,with a complete CH4conversion at 540℃. Following it,the mixed ship-like CeO2-MnOx oxides catalyst had 94.05% of the CH4conversion at 540℃. On the contrast,the mixed nano sheet CeO2-MnOx oxides catalyst presented the lowest catalytic activity with only 89.68% CH4conversion at the same reaction temprature owing to its lower oxygen vacancies and surface active oxygen.关键词
CeO2/MnOx/低浓度甲烷/催化燃烧/形貌Key words
ceria/manganese oxide/lean methane/catalytic combustion/morphology分类
化学引用本文复制引用
李树娜,宋佩,张金丽,贺小霞,解一昕,张亚刚,王瑞义,李志凯,朱华青..CeO2-MnOx催化剂形貌对低浓度甲烷催化燃烧反应性能的影响[J].燃料化学学报,2018,46(5):615-624,10.基金项目
国家自然科学基金(51704240,21703276,51602253),陕西省自然科学基金(2016JQ2030,2016JQ2017),陕西省教育厅基金(15JK1491),西安市科技计划项目(2017CGWL24,CXY1531WL03)和2017年省级大学生创新创业计划项目资助 The project was supported by the National Natural Science Foundation of China(51704240,21703276,51602253),the Natural Science Foundation of Shaanxi Province of China(2016JQ2030,2016JQ2017),Natural Science Foundation of Education Department of Shaanxi Province(15JK1491),the Special Natural Science Foundation of Science and Technology Bureau of Xian City(2017CGWL24,CXY1531WL03)and College Students'Innovation and Entrepreneurship Program project of Shaanxi Province in 2017. （51704240,21703276,51602253）
