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 70-80

Areas of Advance

Transport

Subject Categories

Chemical Engineering

DOI

10.1007/s10562-013-1133-0

More information

Created

10/7/2017