Alkali resistant Cu/zeolite deNOx catalysts for flue gas cleaning in biomass fired applications

Siva Sankar Reddy Putluru; Anders Riisager; Rasmus Fehrmann

doi:10.1016/j.apcatb.2010.09.015

Alkali resistant Cu/zeolite deNOx catalysts for flue gas cleaning in biomass fired applications

Siva Sankar Reddy Putluru, Anders Riisager, Rasmus Fehrmann

Department of Chemistry

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

Abstract

Cu/zeolite catalysts have been prepared by wet impregnation and characterized by N2 physisorption, EPR, H2-TPR and NH3-TPD methods. The Cu content was varied to optimize the loading as well as surface acidity. Optimized Cu/zeolite catalysts showed high surface acidity and excellent activity in the selective catalytic reduction (SCR) of NO with NH3. Furthermore, Cu/zeolite catalysts showed high SCR activity even after doping with potassium (0–500μmol/g) compared to a commercial vanadium catalyst which deactivated at lower potassium content. Fresh and deactivated catalysts were further examined to investigate the redox and acidic properties of the catalysts. The poisoning resistivity seems to be due to a combination of high surface area and strong acidity of the Cu/zeolite catalysts. The catalysts might be attractive alternatives to conventional catalysts for deNOx of flue gases from biomass fired power plants and other stationary industrial installations.

Original language	English
Journal	Applied Catalysis B: Environmental
Volume	101
Issue number	3-4
Pages (from-to)	183-188
ISSN	0926-3373
DOIs	https://doi.org/10.1016/j.apcatb.2010.09.015
Publication status	Published - 2011

Keywords

Cu/zeolite
SCR of NO with NH3
H2-TPR
Potassium poisoning
NH3-TPD

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title = "Alkali resistant Cu/zeolite deNOx catalysts for flue gas cleaning in biomass fired applications",

abstract = "Cu/zeolite catalysts have been prepared by wet impregnation and characterized by N2 physisorption, EPR, H2-TPR and NH3-TPD methods. The Cu content was varied to optimize the loading as well as surface acidity. Optimized Cu/zeolite catalysts showed high surface acidity and excellent activity in the selective catalytic reduction (SCR) of NO with NH3. Furthermore, Cu/zeolite catalysts showed high SCR activity even after doping with potassium (0–500μmol/g) compared to a commercial vanadium catalyst which deactivated at lower potassium content. Fresh and deactivated catalysts were further examined to investigate the redox and acidic properties of the catalysts. The poisoning resistivity seems to be due to a combination of high surface area and strong acidity of the Cu/zeolite catalysts. The catalysts might be attractive alternatives to conventional catalysts for deNOx of flue gases from biomass fired power plants and other stationary industrial installations.",

keywords = "Cu/zeolite, SCR of NO with NH3, H2-TPR, Potassium poisoning, NH3-TPD",

author = "Putluru, {Siva Sankar Reddy} and Anders Riisager and Rasmus Fehrmann",

year = "2011",

doi = "10.1016/j.apcatb.2010.09.015",

language = "English",

volume = "101",

pages = "183--188",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

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TY - JOUR

T1 - Alkali resistant Cu/zeolite deNOx catalysts for flue gas cleaning in biomass fired applications

AU - Putluru, Siva Sankar Reddy

AU - Riisager, Anders

AU - Fehrmann, Rasmus

PY - 2011

Y1 - 2011

N2 - Cu/zeolite catalysts have been prepared by wet impregnation and characterized by N2 physisorption, EPR, H2-TPR and NH3-TPD methods. The Cu content was varied to optimize the loading as well as surface acidity. Optimized Cu/zeolite catalysts showed high surface acidity and excellent activity in the selective catalytic reduction (SCR) of NO with NH3. Furthermore, Cu/zeolite catalysts showed high SCR activity even after doping with potassium (0–500μmol/g) compared to a commercial vanadium catalyst which deactivated at lower potassium content. Fresh and deactivated catalysts were further examined to investigate the redox and acidic properties of the catalysts. The poisoning resistivity seems to be due to a combination of high surface area and strong acidity of the Cu/zeolite catalysts. The catalysts might be attractive alternatives to conventional catalysts for deNOx of flue gases from biomass fired power plants and other stationary industrial installations.

AB - Cu/zeolite catalysts have been prepared by wet impregnation and characterized by N2 physisorption, EPR, H2-TPR and NH3-TPD methods. The Cu content was varied to optimize the loading as well as surface acidity. Optimized Cu/zeolite catalysts showed high surface acidity and excellent activity in the selective catalytic reduction (SCR) of NO with NH3. Furthermore, Cu/zeolite catalysts showed high SCR activity even after doping with potassium (0–500μmol/g) compared to a commercial vanadium catalyst which deactivated at lower potassium content. Fresh and deactivated catalysts were further examined to investigate the redox and acidic properties of the catalysts. The poisoning resistivity seems to be due to a combination of high surface area and strong acidity of the Cu/zeolite catalysts. The catalysts might be attractive alternatives to conventional catalysts for deNOx of flue gases from biomass fired power plants and other stationary industrial installations.

KW - Cu/zeolite

KW - SCR of NO with NH3

KW - H2-TPR

KW - Potassium poisoning

KW - NH3-TPD

U2 - 10.1016/j.apcatb.2010.09.015

DO - 10.1016/j.apcatb.2010.09.015

M3 - Journal article

SN - 0926-3373

VL - 101

SP - 183

EP - 188

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

IS - 3-4

ER -

Alkali resistant Cu/zeolite deNOx catalysts for flue gas cleaning in biomass fired applications

Abstract

Keywords

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