期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 291, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120125
关键词
Heterogeneous catalysis; NOx removal; Hydrothermal stability; Anti-sintering; SnO2
资金
- Key Project of National Natural Science Foundation [21637005]
- National Natural Science Foundation of China [51822811]
- Youth Innovation Promotion Association of CAS [2019045]
- K. C. Wong Education Foundation
In this study, a Ce1W0.24Sn2Ox catalyst with high hydrothermal stability was synthesized for NOx removal from diesel engines, showing excellent performance. The experimental results demonstrate that the catalyst exhibits outstanding sintering resistance and provides sufficient active phase for catalytic reaction.
Thermal stability is crucial for the practical application of heterogeneous catalysts. In particular, the development of catalysts with excellent hydrothermal stability remains a big challenge for diesel exhaust after-treatment technologies. Here, we synthesized a Ce1W0.24Sn2Ox catalyst with high hydrothermal stability for the NOx removal from diesel engines. The catalyst shows >90 % NOx conversion at 300 550 degrees C even after an extreme aging treatment at 1000 degrees C, with much better hydrothermal stability than the Ce1W0.24Ox catalyst and the commercial catalysts such as Cu-SSZ-13 and V2O5-WO3/TiO2. The experimental and theoretical results reveal that the SnO2-related particles modified by W and Ce species show outstanding sintering resistance at high temperature, which provides sufficient Ce-W active phase for the catalytic reaction. This study may provide new opportunities for the application of metal oxide catalysts for diesel engine NOx emission control and a new idea for the development of catalysts with high thermal stability.
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