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

Publication: Research - peer-reviewJournal article – Annual report year: 2009

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@article{4ded870c2357484c82696cb50eaf01b8,
title = "Impact of Support and Potassium-Poisoning on the V2O5-WO3/ZrO2 Catalyst Performance in Ammonia Oxidation",
keywords = "Crystallinity, NH3 oxidation, SCR catalysts, Potassium, Tungsten oxide, Deactivation",
publisher = "Elsevier BV",
author = "Johannes Due-Hansen and Arkadii Kustov and Christensen, {Claus H.} and Rasmus Fehrmann",
year = "2009",
doi = "10.1016/j.catcom.2008.12.002",
volume = "10",
number = "6",
pages = "803--806",
journal = "Catalysis Communications",
issn = "1566-7367",

}

RIS

TY - JOUR

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

A1 - Due-Hansen,Johannes

A1 - Kustov,Arkadii

A1 - Christensen,Claus H.

A1 - Fehrmann,Rasmus

AU - Due-Hansen,Johannes

AU - Kustov,Arkadii

AU - Christensen,Claus H.

AU - Fehrmann,Rasmus

PB - Elsevier BV

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

JO - Catalysis Communications

JF - Catalysis Communications

SN - 1566-7367

IS - 6

VL - 10

SP - 803

EP - 806

ER -