Impact of Support and Potassium-Poisoning on the V2O5-WO3/ZrO2 Catalyst Performance in Ammonia Oxidation

Johannes Due-Hansen; Arkadii Kustov; Claus H. Christensen; Rasmus Fehrmann

doi:10.1016/j.catcom.2008.12.002

Impact of Support and Potassium-Poisoning on the V2O5-WO3/ZrO2 Catalyst Performance in Ammonia Oxidation

Johannes Due-Hansen, Arkadii Kustov, Claus H. Christensen, Rasmus Fehrmann

Department of Chemistry

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

Abstract

A series of WO3-promoted zirconia supports were synthesized and calcined between 400 and 800C. Subsequently vanadium oxide was introduced to obtain 3.5 wt% V2O5. The influence of the calcination temperature and potassium-poisoning (K/V = 0.2, molar ratio) on the catalytic activity in the selective catalytic reduction (SCR) of NO with NH3 was previously studied. Here, we focus on the influence of these parameters on the catalytic activity for the undesirable oxidation of ammonia, which decrease the N2 selectivity of the SCR process. It is found that potassium doping of the catalysts results in a considerable decrease in the overall ammonia conversion while selectivity to NO increases.

Original language	English
Journal	Catalysis Communications
Volume	10
Issue number	6
Pages (from-to)	803-806
ISSN	1566-7367
DOIs	https://doi.org/10.1016/j.catcom.2008.12.002
Publication status	Published - 2009

Keywords

Crystallinity
NH3 oxidation
SCR catalysts
Potassium
Tungsten oxide
Deactivation

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title = "Impact of Support and Potassium-Poisoning on the V2O5-WO3/ZrO2 Catalyst Performance in Ammonia Oxidation",

abstract = "A series of WO3-promoted zirconia supports were synthesized and calcined between 400 and 800C. Subsequently vanadium oxide was introduced to obtain 3.5 wt\% V2O5. The influence of the calcination temperature and potassium-poisoning (K/V = 0.2, molar ratio) on the catalytic activity in the selective catalytic reduction (SCR) of NO with NH3 was previously studied. Here, we focus on the influence of these parameters on the catalytic activity for the undesirable oxidation of ammonia, which decrease the N2 selectivity of the SCR process. It is found that potassium doping of the catalysts results in a considerable decrease in the overall ammonia conversion while selectivity to NO increases.",

keywords = "Crystallinity, NH3 oxidation, SCR catalysts, Potassium, Tungsten oxide, Deactivation",

author = "Johannes Due-Hansen and Arkadii Kustov and Christensen, \{Claus H.\} and Rasmus Fehrmann",

year = "2009",

doi = "10.1016/j.catcom.2008.12.002",

language = "English",

volume = "10",

pages = "803--806",

journal = "Catalysis Communications",

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TY - JOUR

T1 - Impact of Support and Potassium-Poisoning on the V2O5-WO3/ZrO2 Catalyst Performance in Ammonia Oxidation

AU - Due-Hansen, Johannes

AU - Kustov, Arkadii

AU - Christensen, Claus H.

AU - Fehrmann, Rasmus

PY - 2009

Y1 - 2009

N2 - A series of WO3-promoted zirconia supports were synthesized and calcined between 400 and 800C. Subsequently vanadium oxide was introduced to obtain 3.5 wt% V2O5. The influence of the calcination temperature and potassium-poisoning (K/V = 0.2, molar ratio) on the catalytic activity in the selective catalytic reduction (SCR) of NO with NH3 was previously studied. Here, we focus on the influence of these parameters on the catalytic activity for the undesirable oxidation of ammonia, which decrease the N2 selectivity of the SCR process. It is found that potassium doping of the catalysts results in a considerable decrease in the overall ammonia conversion while selectivity to NO increases.

AB - A series of WO3-promoted zirconia supports were synthesized and calcined between 400 and 800C. Subsequently vanadium oxide was introduced to obtain 3.5 wt% V2O5. The influence of the calcination temperature and potassium-poisoning (K/V = 0.2, molar ratio) on the catalytic activity in the selective catalytic reduction (SCR) of NO with NH3 was previously studied. Here, we focus on the influence of these parameters on the catalytic activity for the undesirable oxidation of ammonia, which decrease the N2 selectivity of the SCR process. It is found that potassium doping of the catalysts results in a considerable decrease in the overall ammonia conversion while selectivity to NO increases.

KW - Crystallinity

KW - NH3 oxidation

KW - SCR catalysts

KW - Potassium

KW - Tungsten oxide

KW - Deactivation

U2 - 10.1016/j.catcom.2008.12.002

DO - 10.1016/j.catcom.2008.12.002

M3 - Journal article

SN - 1566-7367

VL - 10

SP - 803

EP - 806

JO - Catalysis Communications

JF - Catalysis Communications

IS - 6

ER -

Impact of Support and Potassium-Poisoning on the V2O5-WO3/ZrO2 Catalyst Performance in Ammonia Oxidation

Abstract

Keywords

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