Deactivation of Cu/Zeolite SCR Catalyst Due To Reductive Hydrothermal Aging

Published April 14, 2008 by SAE International in United States
Deactivation of Cu/Zeolite SCR Catalyst Due To Reductive Hydrothermal Aging
Sector:
Citation: Huang, Y., Cheng, Y., and Lambert, C., "Deactivation of Cu/Zeolite SCR Catalyst Due To Reductive Hydrothermal Aging," SAE Int. J. Fuels Lubr. 1(1):466-470, 2009, https://doi.org/10.4271/2008-01-1021.
Language: English

Abstract:

Temperature programmed reduction by CO, H2, and propylene (C3H6), as well as hydrothermal aging in the presence of mixture of NO, HC, CO, H2 and O2 were used to study the deactivation of Cu/zeolite SCR catalysts. The presence of CO had no detrimental effect on catalyst activity. Carbonaceous deposit on the catalyst surface from propylene (C3H6) reduction suppressed the catalyst activity and burn off of carbonaceous deposit recovered activity, the presence of O2 suppressed carbonaceous deposit formation. The presence of H2 under lean conditions had much less effect on catalyst activity than H2 presence under rich conditions. Rich conditions with O2 presence represented the most detrimental effect on catalyst activity.