Ethanol-selective catalytic reduction of NO by Ag/Al2O3 catalysts: Activity and deactivation by alkali salts

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Ethanol-selective catalytic reduction of NO by Ag/Al2O3 catalysts: Activity and deactivation by alkali salts. / Schill, Leonhard; Putluru, Siva Sankar Reddy; Jacobsen, Casper Funk; Hansen, Christian Houmann; Fehrmann, Rasmus; Jensen, Anker Degn.

In: Applied Catalysis B: Environmental, Vol. 127, 2012, p. 323-329.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Schill, Leonhard; Putluru, Siva Sankar Reddy; Jacobsen, Casper Funk; Hansen, Christian Houmann; Fehrmann, Rasmus; Jensen, Anker Degn / Ethanol-selective catalytic reduction of NO by Ag/Al2O3 catalysts: Activity and deactivation by alkali salts.

In: Applied Catalysis B: Environmental, Vol. 127, 2012, p. 323-329.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{ecf5221903d54ed085f0de1dc2a96d91,
title = "Ethanol-selective catalytic reduction of NO by Ag/Al2O3 catalysts: Activity and deactivation by alkali salts",
keywords = "SCR of NO with ethanol, Ag/Al2O3, Potassium poisining",
publisher = "Elsevier BV",
author = "Leonhard Schill and Putluru, {Siva Sankar Reddy} and Jacobsen, {Casper Funk} and Hansen, {Christian Houmann} and Rasmus Fehrmann and Jensen, {Anker Degn}",
year = "2012",
doi = "10.1016/j.apcatb.2012.08.035",
volume = "127",
pages = "323--329",
journal = "Applied Catalysis B: Environmental",
issn = "0926-3373",

}

RIS

TY - JOUR

T1 - Ethanol-selective catalytic reduction of NO by Ag/Al2O3 catalysts: Activity and deactivation by alkali salts

A1 - Schill,Leonhard

A1 - Putluru,Siva Sankar Reddy

A1 - Jacobsen,Casper Funk

A1 - Hansen,Christian Houmann

A1 - Fehrmann,Rasmus

A1 - Jensen,Anker Degn

AU - Schill,Leonhard

AU - Putluru,Siva Sankar Reddy

AU - Jacobsen,Casper Funk

AU - Hansen,Christian Houmann

AU - Fehrmann,Rasmus

AU - Jensen,Anker Degn

PB - Elsevier BV

PY - 2012

Y1 - 2012

N2 - Ag/Al2O3 catalysts with and without potassium doping were prepared by incipient wetness impregnation and characterized by N2 physisorption, XRPD, NH3-TPD and SEM. The influence of the Ag content from 1 to 5 wt.% was investigated for the selective catalytic reduction (SCR) of NO with ethanol. The 3 wt.% Ag/Al2O3 catalyst was found to be the most active and CO2 selective over a wide temperature window (300–500 ◦C). Addition of 500 ppm of H2 has a mild promotional effect on the activity while SO2 has a strong negative influence on the SCR activity. Furthermore, the Ag/Al2O3 ethanol-SCR catalyst deactivated significantly by the addition of potassium although it was more resistant than the conventional V2O5 based NH3-SCR catalyst, which deactivated more at lower potassium loading. The higher potassium resistivity of the Ag/Al2O3 catalysts seems to be due to differences in reaction mechanism of Ag/Al2O3 ethanol-SCR catalyst compared to the conventional NH3-SCR catalyst. The still low potassium resistance, in combination with the high sensitivity to SO2, seems not to make these catalysts a real option for biomass fired boilers.

AB - Ag/Al2O3 catalysts with and without potassium doping were prepared by incipient wetness impregnation and characterized by N2 physisorption, XRPD, NH3-TPD and SEM. The influence of the Ag content from 1 to 5 wt.% was investigated for the selective catalytic reduction (SCR) of NO with ethanol. The 3 wt.% Ag/Al2O3 catalyst was found to be the most active and CO2 selective over a wide temperature window (300–500 ◦C). Addition of 500 ppm of H2 has a mild promotional effect on the activity while SO2 has a strong negative influence on the SCR activity. Furthermore, the Ag/Al2O3 ethanol-SCR catalyst deactivated significantly by the addition of potassium although it was more resistant than the conventional V2O5 based NH3-SCR catalyst, which deactivated more at lower potassium loading. The higher potassium resistivity of the Ag/Al2O3 catalysts seems to be due to differences in reaction mechanism of Ag/Al2O3 ethanol-SCR catalyst compared to the conventional NH3-SCR catalyst. The still low potassium resistance, in combination with the high sensitivity to SO2, seems not to make these catalysts a real option for biomass fired boilers.

KW - SCR of NO with ethanol

KW - Ag/Al2O3

KW - Potassium poisining

U2 - 10.1016/j.apcatb.2012.08.035

DO - 10.1016/j.apcatb.2012.08.035

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

SN - 0926-3373

VL - 127

SP - 323

EP - 329

ER -