Deactivation of Cu/Zeolite SCR Catalyst Due To Reductive Hydrothermal Aging
Date Published: 2008-04-14
Paper Number:2008-01-1021
DOI: 10.4271/2008-01-1021
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, doi:10.4271/2008-01-1021.
Temperature programmed reduction by CO, H
2
, and propylene (C
3
H
6
), as well as hydrothermal aging in the presence of mixture of NO, HC, CO, H
2
and O
2
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 (C
3
H
6
) reduction suppressed the catalyst activity and burn off of carbonaceous deposit recovered activity, the presence of O
2
suppressed carbonaceous deposit formation. The presence of H
2
under lean conditions had much less effect on catalyst activity than H
2
presence under rich conditions. Rich conditions with O
2
presence represented the most detrimental effect on catalyst activity.
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