Study of the "Fast SCR"-like mechanism of H2-assisted SCR of NOx with ammonia over Ag/Al2O3
Artikel i vetenskaplig tidskrift, 2012
It is shown that Ag/Al2O3 is a unique catalytic system for H-2-assisted selective catalytic reduction of NOx by NH3 (NH3-SCR) with both Ag and alumina being necessary components of the catalyst. The ability of Ag/Al2O3 and pure Al2O3 to catalyse SCR of mixtures of NO and NO2 by ammonia is demonstrated, the surface species occurring discussed, and a "Fast SCR"-like mechanism of the process is proposed. The possibility of catalyst surface blocking by adsorbed NOx and the influence of hydrogen on desorption of NOx were evaluated by FTIR and OFT calculations.
nitric-oxide
o-2
Fast SCR
hydrocarbons
Alumina
adsorption
Ag/Al2O3
lean conditions
gamma-alumina
hydrogen storage
selective catalytic-reduction
h-2
FTIR
silver-alumina catalyst
NOx SCR
Författare
D. E. Doronkin
Danmarks Tekniske Universitet (DTU)
Sebastian Fogel
Haldor Topsoe
Stefanie Tamm
Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik
Kompetenscentrum katalys
Louise Olsson
Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik
Kompetenscentrum katalys
T. S. Khan
Danmarks Tekniske Universitet (DTU)
T. Bligaard
Stanford University
Pär Gabrielsson
Haldor Topsoe
S. Dahl
Danmarks Tekniske Universitet (DTU)
Applied Catalysis B: Environmental
0926-3373 (ISSN) 1873-3883 (eISSN)
Vol. 113 228-236Styrkeområden
Transport
Materialvetenskap
Ämneskategorier
Kemi
DOI
10.1016/j.apcatb.2011.11.042