期刊
CHINESE JOURNAL OF CATALYSIS
卷 41, 期 2, 页码 364-373出版社
SCIENCE PRESS
DOI: 10.1016/S1872-2067(19)63437-6
关键词
DeNO(x); CeO2-TiO2 catalyst; MoO3 modification; SO2 poisoning; Surface acidity
资金
- National Natural Science Foundation of China [21773106, 21707066, 21677069, 21806077]
- China Postdoctoral Science Foundation [2018M642206]
The effect of molybdenum oxide on the activity and durability of CeO2-TiO2 catalyst for NO reduction by NH3 was examined. It was found that the introduction of Mo could improve the low-temperature NH3-SCR activity and SO2/H2O durability of the CeO2-TiO2 catalyst and an optimal loading of Mo was 4 wt.%. The best MoO3/CeO2-TiO2 catalyst displayed over 90% NO conversion from 200 degrees C to 400 degrees C and obtained 4 -fold increase in NO conversion compared to CeO2-TiO2 at 150 degrees C. The characterization results revealed that the number of Bronsted acid sites over MoO3/CeO2-TiO2 was significantly increased, and the adsorption of nitrate species was dramatically weakened because of the coverage of MoO3, which were favorable for the high NH3-SCR performance. It is believed that the MoO3/CeO2-TiO2 catalyst is a suitable substitute for the NH3-SCR reaction. (C) 2020, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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