Recent advances in catalytic automotive emission control: Passive  NO  storage at low temperatures | Zendy

Wang Yujie | Zendy; Yong Xin | Zendy; Rong Mingyue | Zendy; Zheng Jiandong | Zendy; Zhao Huawang | Zendy

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Recent advances in catalytic automotive emission control: Passive NO storage at low temperatures

Author(s) -

Wang Yujie,

Yong Xin,

Rong Mingyue,

Zheng Jiandong,

Zhao Huawang

Publication year - 2020

Publication title -

journal of the chinese chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.329

H-Index - 45

eISSN - 2192-6549

pISSN - 0009-4536

DOI - 10.1002/jccs.202000203

Subject(s) - catalysis , chemistry , adsorption , zeolite , selective catalytic reduction , chemical engineering , nanotechnology , organic chemistry , materials science , engineering

In the practical applications, a high portion of the NO x is emitted without purification in the cold start period of engine because the selective catalytic reduction (SCR) or NO x storage and reduction (NSR) catalysts are not warmed up. Passive NO x absorbers (PNA) were proposed earlier to store the NO x at low temperatures and release the stored NO x during warm‐up period when the SCR and NSR catalysts downstream are functional, while this concept just attracted great interests recently to meet the extra stringent requirement of governmental emissions regulations. A plant of PNA catalysts, showing different NO adsorption/release characteristics, was disclosed. This review summarizes the recent progress in the development of PNA catalysts. The characteristics of NO adsorption/release on precious metal (i.e., Pt, Pd) loading Al 2 O 3 support catalysts, CeO 2 support catalysts, and zeolite support catalysts are summarized and compared.

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