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.

selective catalytic-reduction

Alumina

gamma-alumina

Fast SCR

adsorption

NOx SCR

o-2

Ag/Al2O3

silver-alumina catalyst

hydrocarbons

h-2

nitric-oxide

lean conditions

hydrogen storage

FTIR

Författare

D. E. Doronkin

Danmarks Tekniske Universitet

Sebastian Fogel

Haldor Topsoe A/S

Stefanie Tamm

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

Kompetenscentrum katalys (KCK)

Louise Olsson

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Kemisk reaktionsteknik

T. S. Khan

Danmarks Tekniske Universitet

T. Bligaard

Stanford Linear Accelerator Center

Pär Gabrielsson

Haldor Topsoe A/S

S. Dahl

Danmarks Tekniske Universitet

Applied Catalysis B: Environmental

0926-3373 (ISSN) 1873-3883 (eISSN)

Vol. 113 228-236

Styrkeområden

Transport

Materialvetenskap

Ämneskategorier

Kemi

DOI

10.1016/j.apcatb.2011.11.042