Recent progress in performance optimization of Cu-SSZ-13 catalyst for selective catalytic reduction of NOx

• Published in: Frontiers in chemistry 2022-10, Vol.10
• Main Authors: Li, Pan, Xin, Ying, Zhang, Hanxue, Yang, Fuzhen, Tang, Ahui, Han, Dongxu, Jia, Junxiu, Wang, Jin, Li, Zhenguo, Zhang, Zhaoliang
• Format: Article
• Language: English
• Subjects: Cu-SSZ-13 catalyst; hydrothermal stability; low-temperature activity; poisoning resistance; selective catalytic reduction
• ISSN: 2296-2646; 2296-2646
• DOI: 10.3389/fchem.2022.1033255

Nitrogen oxides (NO x ), which are the major gaseous pollutants emitted by mobile sources, especially diesel engines, contribute to many environmental issues and harm human health. Selective catalytic reduction of NO x with NH 3 (NH 3 -SCR) is proved to be one of the most efficient techniques for reducing NO x emission. Recently, Cu-SSZ-13 catalyst has been recognized as a promising candidate for NH 3 -SCR catalyst for reducing diesel engine NO x emissions due to its wide active temperature window and excellent hydrothermal stability. Despite being commercialized as an advanced selective catalytic reduction catalyst, Cu-SSZ-13 catalyst still confronts the challenges of low-temperature activity and hydrothermal aging to meet the increasing demands on catalytic performance and lifetime. Therefore, numerous studies have been dedicated to the improvement of NH 3 -SCR performance for Cu-SSZ-13 catalyst. In this review, the recent progress in NH 3 -SCR performance optimization of Cu-SSZ-13 catalysts is summarized following three aspects: 1) modifying the Cu active sites; 2) introducing the heteroatoms or metal oxides; 3) regulating the morphology. Meanwhile, future perspectives and opportunities of Cu-SSZ-13 catalysts in reducing diesel engine NO x emissions are discussed.