Citation: LI Shu-na, SONG Pei, ZHANG Jin-li, HE Xiao-xia, XIE Yi-xin, ZHANG Ya-gang, WANG Rui-yi, LI Zhi-kai, ZHU Hua-qing. Morphological effect of CeO₂-MnO_x catalyst on their catalytic performance in lean methane combustion[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(5): 615-624. shu

Morphological effect of CeO₂-MnO_x catalyst on their catalytic performance in lean methane combustion

LI Shu-na ^1,, ,
SONG Pei ¹ ,
ZHANG Jin-li ¹ ,
HE Xiao-xia ¹ ,
XIE Yi-xin ¹ ,
ZHANG Ya-gang ² ,
WANG Rui-yi ³ ,
LI Zhi-kai ^3,, ,
ZHU Hua-qing ^3,,

1.
School of Chemical Engineering, Xi'an University, Xi'an Engineering Research Center of Environmental Detection and Food Safety, Xi'an 710065, China
2.
College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
3.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Corresponding author: LI Shu-na, lishuna165@126.com LI Zhi-kai, lizhikai@sxicc.ac.cn ZHU Hua-qing, zhhq@sxicc.ac.cn
Received Date: 8 February 2018
Revised Date: 8 April 2018

Fund Project: Natural Science Foundation of Education Department of Shaanxi Province 15JK1491the Natural Science Foundation of Shaanxi Province of China 2016JQ2030the Special Natural Science Foundation of Science and Technology Bureau of Xian City CXY1531WL03the Special Natural Science Foundation of Science and Technology Bureau of Xian City 2017CGWL24the Natural Science Foundation of Shaanxi Province of China 2016JQ2017the National Natural Science Foundation of China 51704240The 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 2017the National Natural Science Foundation of China 21703276the National Natural Science Foundation of China 51602253

Figures(10)

Ship-like, oblate spheroid and nano sheet CeO₂-MnO_x mixed oxides were prepared by hydrothermal method and characterized by N₂ sorption, XRD, SEM, TEM, H₂-TPR, Raman spectra and XPS. The relationship between the structure of CeO₂-MnO_x and their catalytic performance in lean methane combustion were then investigated. The results reveal that the catalytic performance of the mixed CeO₂-MnO_x oxide was greatly depended on its morphology. Among all of the samples, the mixed oblate spheroid CeO₂-MnO_x oxides with most oxygen vacancies, Ce³⁺ content and surface active oxygen exhibited the highest activity in lean methane combustion, with a complete CH₄ conversion at 540℃. Following it, the mixed ship-like CeO₂-MnO_x oxides catalyst had 94.05% of the CH₄ conversion at 540℃. On the contrast, the mixed nano sheet CeO₂-MnO_x oxides catalyst presented the lowest catalytic activity with only 89.68% CH₄ conversion at the same reaction temprature owing to its lower oxygen vacancies and surface active oxygen.
- ceria,
- manganese oxide,
- lean methane,
- catalytic combustion,
- morphology
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沈阳化工大学材料科学与工程学院沈阳 110142

Morphological effect of CeO2-MnOx catalyst on their catalytic performance in lean methane combustion

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通讯作者: 陈斌, bchen63@163.com

Morphological effect of CeO₂-MnO_x catalyst on their catalytic performance in lean methane combustion