期刊
CATALYSIS TODAY
卷 153, 期 3-4, 页码 95-102出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2010.01.061
关键词
Selective catalytic reduction; NOx storage and reduction; Sulfur tolerance; deNO(x) catalyst
资金
- National Natural Science Foundation of China [20907003, 20677034]
- Beijing University of Chemical Technology
- State Key Laboratory of Chemical Resources Engineering Foundation
Catalytic removal of NOx under lean-burn conditions is challenging to attain the future stringent NOx emission standards Selective catalytic reduction (SCR) of NOx with different reducing agents and NOx storage-reduction (NSR) are viewed as the two most promising technologies for NOx removal Although a variety of catalytic systems have been developed for these processes, their practical applications remain difficult due to catalyst deactivation caused by SO2 in the exhaust gases Therefore, improving catalyst tolerance against SO2 is one of the most important targets in the deNO(x), catalyst development. This review focuses on the knowledge and know-how that have been developed in improving the sulfur tolerance of deNO(x) catalysts Ag/Al2O3 is the most promising catalyst for the HC-SCR of NOx Support modification, H-2 co-feeding and some other strategies to improve the sulfur tolerance of Ag/Al2O3 are discussed. Some novel catalyst systems with high sulfur tolerance for NH3-SCR, H-2-SCR and NSR are addressed, respectively For NSR catalysts, developing novel sulfur resistant NOx storage systems and effective desulfation processes seem to be two avenues to improve their sulfur resistance (C) 2010 Elsevier B V. All rights reserved.
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