Study of the "Fast SCR" -like mechanism of H2-assisted SCR of NOx with ammonia over Ag/Al2O3

Dmitry E. Doronkin; Sebastian Fogel; Stefanie Tamm; Louise Olsson; Tuhin Suvra Khan; Thomas Bligaard; Pär Gabrielsson; Søren Dahl

doi:10.1016/j.apcatb.2011.11.042

Study of the "Fast SCR" -like mechanism of H2-assisted SCR of NOx with ammonia over Ag/Al2O3

Dmitry E. Doronkin, Sebastian Fogel, Stefanie Tamm, Louise Olsson, Tuhin Suvra Khan, Thomas Bligaard, Pär Gabrielsson, Søren Dahl

Research output: Contribution to journal › Journal article › Research › peer-review

2094 Downloads (Pure)

Abstract

It is shown that Ag/Al2O3 is a unique catalytic system for H2-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 DFT calculations. © 2011 Elsevier B.V.

Original language	English
Journal	Applied Catalysis B: Environmental
Volume	113-114
Pages (from-to)	228-236
ISSN	0926-3373
DOIs	https://doi.org/10.1016/j.apcatb.2011.11.042
Publication status	Published - 2012

Keywords

Fast SCR
NOx SCR
Alumina
Ag/Al2O3
FTIR

Access to Document

10.1016/j.apcatb.2011.11.042

Study of the Fast SCR mechanism ApplCatalB

OpenUrl availability

Full text

Cite this

@article{9d58f9e108a04e4cbc46414d4a68f818,

title = "Study of the {"}Fast SCR{"} -like mechanism of H2-assisted SCR of NOx with ammonia over Ag/Al2O3",

abstract = "It is shown that Ag/Al2O3 is a unique catalytic system for H2-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 DFT calculations. {\textcopyright} 2011 Elsevier B.V.",

keywords = "Fast SCR, NOx SCR, Alumina, Ag/Al2O3, FTIR",

author = "Doronkin, {Dmitry E.} and Sebastian Fogel and Stefanie Tamm and Louise Olsson and Khan, {Tuhin Suvra} and Thomas Bligaard and P{\"a}r Gabrielsson and S{\o}ren Dahl",

year = "2012",

doi = "10.1016/j.apcatb.2011.11.042",

language = "English",

volume = "113-114",

pages = "228--236",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier",

}

TY - JOUR

T1 - Study of the "Fast SCR" -like mechanism of H2-assisted SCR of NOx with ammonia over Ag/Al2O3

AU - Doronkin, Dmitry E.

AU - Fogel, Sebastian

AU - Tamm, Stefanie

AU - Olsson, Louise

AU - Khan, Tuhin Suvra

AU - Bligaard, Thomas

AU - Gabrielsson, Pär

AU - Dahl, Søren

PY - 2012

Y1 - 2012

N2 - It is shown that Ag/Al2O3 is a unique catalytic system for H2-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 DFT calculations. © 2011 Elsevier B.V.

AB - It is shown that Ag/Al2O3 is a unique catalytic system for H2-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 DFT calculations. © 2011 Elsevier B.V.

KW - Fast SCR

KW - NOx SCR

KW - Alumina

KW - Ag/Al2O3

KW - FTIR

U2 - 10.1016/j.apcatb.2011.11.042

DO - 10.1016/j.apcatb.2011.11.042

M3 - Journal article

SN - 0926-3373

VL - 113-114

SP - 228

EP - 236

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -

Study of the "Fast SCR" -like mechanism of H2-assisted SCR of NOx with ammonia over Ag/Al2O3

Abstract

Keywords

Access to Document

OpenUrl availability

Fingerprint

Cite this