The Effect of NO2/NOx Feed Ratio on the NH3-SCR System Over Cu–Zeolites with Varying Copper Loading
Artikel i vetenskaplig tidskrift, 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.


Oana Mihai

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Catur Rini Widyastuti

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

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, Kemi- och bioteknik, Kemisk reaktionsteknik

Kompetenscentrum katalys

Catalysis Letters

1011-372X (ISSN) 1572-879X (eISSN)

Vol. 144 1 70-80







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