Insight into the effect of phosphorus poisoning of Cu/zeolites with different framework towards NH3-SCR
Journal article, 2023

Cu/zeolites were prepared to elucidate the effect of phosphorus poisoning on different zeolite framework structures for NH3-SCR. The results show that there are significant differences in phosphorus poisoning depending on the zeolite framework structure. The PO3−/PO43− species gradually decreased along with an increase in P2O5 in the following order: Cu/SSZ-13, Cu/ZSM-5, and Cu/BEA. One possible reason could be the increased pore size of these zeolites, which results in less steric hindrance for larger P2O5 species. P2O5 is suggested to enhance the redox ability of Cu ions, which results in an increase in low-temperature activity in NH3-SCR, whereas Cu ions were significantly poisoned by PO3−/PO43−, resulting in low-temperature deactivation. Furthermore, the effect of phosphorus poisoning on the structure of Cu/ZSM-5 was found to be much greater than that of Cu/BEA and Cu/SSZ-13, possibly due to phosphorus attacked the surface defects of the zeolite, causing local expansion and cracking.

Phosphorus poisoning

ZSM-5

SSZ-13

BEA

NH -SCR 3

Author

Aiyong Wang

Chalmers, Chemistry and Chemical Engineering, Chemical Technology

College of Sciences

Maria Elena Azzoni

Polytechnic University of Milan

Joonsoo Han

Chalmers, Chemistry and Chemical Engineering, Chemical Technology

Kunpeng Xie

Chemical Engineering Design

Volvo Group

Louise Olsson

Chalmers, Chemistry and Chemical Engineering, Chemical Technology

Chemical Engineering Journal

1385-8947 (ISSN)

Vol. 454 140040

New methodology for fundamental kinetic models in heterogeneous catalysis using inter-disciplinary experiments

Swedish Research Council (VR) (2014-5733), 2014-01-01 -- 2019-12-31.

Subject Categories

Inorganic Chemistry

Materials Chemistry

Other Chemistry Topics

DOI

10.1016/j.cej.2022.140040

More information

Latest update

11/28/2022