Research Progress for Cu-based Small Pore Molecular Sieves as Disel De-NOx Catalysts

  • WENG Duan;WANG Lei;Wu Xiaodong;RAN Rui;SI Zhichun
  • Key Laboratory of Advanced Materials (MOE); School of Materials Science and Engineering, Tsinghua University, Bejing 100084, China

Received date: 2013-05-31

  Revised date: 2013-06-05

  Online published: 2013-08-28


NOx is one of the main pollutants in diesel vehicle emissions. Selective catalytic reduction of NOx by ammonia (NH3-SCR) has been extensively studied for the lean NOx control due to its high performance and economic efficiency. Copper based zeolites have been widely used as the De-NOx catalysts and significant research efforts have concentrated on developing different types of zeolites to improve the activity and durability. Recently, SCR catalysts based on small-pore molecular sieves have been reported for NH3-SCR with much improved activities and high thermal durability and have received substantial attention. This review sums up the research progress related with Cu-based small pore molecular sieves, such as Cu-SSZ-13 and Cu-SAPO-34, as diesel De-NOx Catalysts with outstanding low temperature NH3-SCR activity and hydrothermal stability. The nature of the copper species and the surface acidity are the most important factors that affect the NH3-SCR performance. Important results on the active sites and catalytic mechanisms are especially discussed in details. The possible developing orientations and research interests on the novel catalysts design and mechanisms of poisoning resistance are previewed.

Cite this article

WENG Duan;WANG Lei;Wu Xiaodong;RAN Rui;SI Zhichun . Research Progress for Cu-based Small Pore Molecular Sieves as Disel De-NOx Catalysts[J]. Science & Technology Review, 2013 , 31(24) : 68 -73 . DOI: 10.3981/j.issn.1000-7857.2013.24.011