The Effect of NO2/NOx Feed Ratio on the NH3-SCR System Over Cu–Zeolites with Varying Copper Loading
Journal article, 2014
In this study we examine the NO/NO2–NH3-SCR system over Cu–BEA with varying Cu loading. Significantly higher selective catalytic reduction (SCR) activity is observed at low temperature on highly loaded copper samples, whereas the reverse trend is noticed at high temperature. The N2O formation is substantially increased over “over-exchanged” Cu sites, where Cu co-ordinate to one Al and charge-balanced with one OH-group. This is also the case for NO2 reaction with NH3 to produce NO. Using transient experiments the formation/decomposition of ammonium nitrate species are examined. The decomposition depends on the temperature, the sequence of the feed as well as the type of copper species present.
Author
Oana Mihai
Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering
Catur Rini Widyastuti
Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering
A. Kumar
Cummins Inc.
Junhui Li
Cummins Inc.
S. Y. Joshi
Cummins Inc.
K. Kamasamudram
Cummins Inc.
N. W. Currier
Cummins Inc.
Aleksey Yezerets
Cummins Inc.
Louise Olsson
Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering
Competence Centre for Catalysis (KCK)
Catalysis Letters
1011-372X (ISSN) 1572-879X (eISSN)
Vol. 144 1 70-80Areas of Advance
Transport
Subject Categories
Chemical Engineering
DOI
10.1007/s10562-013-1133-0