TY - JOUR
T1 - Axially Resolved Performance of Cu-Zeolite SCR Catalysts
AU - Henry, Cary
AU - Kamasamudram, Krishna
AU - Currier, Neal
AU - Yezerets, Aleksey
AU - Castagnola, Mario
AU - Chen, Hai Ying
N1 - Publisher Copyright:
Copyright © 2012 SAE International.
PY - 2012/4/16
Y1 - 2012/4/16
N2 - In this work, an alternative method is proposed and validated for quantifying the axial performance of a state-of-the-art Cu zeolite SCR catalyst. Catalyst cores of a standard length, with varying lengths of wash-coated regions were used to axially resolve the functional performance of the SCR catalyst. This proposed method was validated by quantifying the catalyst entrance and exit effects, as well as the effect of non-uniform wash-coat loading densities. This method is less susceptible to some of the complications highlighted in the previous studies, such as flow uniformity between channels, as well as radiative heating effects, since the product gases are sampled across the entire monolith cross-section rather than through a single catalyst channel. The specific catalyst functions quantified include: NO and NH₃ oxidation, NH₃ storage capacity, as well as NOx conversion efficiency. The NOx conversion performance of the catalyst was evaluated for both the standard (NO₂/NOx=0) and fast (NO₂/NOx=0.5) SCR reactions as a function of both axial length and catalyst operating temperature.
AB - In this work, an alternative method is proposed and validated for quantifying the axial performance of a state-of-the-art Cu zeolite SCR catalyst. Catalyst cores of a standard length, with varying lengths of wash-coated regions were used to axially resolve the functional performance of the SCR catalyst. This proposed method was validated by quantifying the catalyst entrance and exit effects, as well as the effect of non-uniform wash-coat loading densities. This method is less susceptible to some of the complications highlighted in the previous studies, such as flow uniformity between channels, as well as radiative heating effects, since the product gases are sampled across the entire monolith cross-section rather than through a single catalyst channel. The specific catalyst functions quantified include: NO and NH₃ oxidation, NH₃ storage capacity, as well as NOx conversion efficiency. The NOx conversion performance of the catalyst was evaluated for both the standard (NO₂/NOx=0) and fast (NO₂/NOx=0.5) SCR reactions as a function of both axial length and catalyst operating temperature.
UR - http://www.scopus.com/inward/record.url?scp=84878793256&partnerID=8YFLogxK
U2 - 10.4271/2012-01-1084
DO - 10.4271/2012-01-1084
M3 - Article
AN - SCOPUS:84878793256
SN - 1946-3936
VL - 5
SP - 975
EP - 984
JO - SAE International Journal of Engines
JF - SAE International Journal of Engines
IS - 3
ER -