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Vanadia supported on zeolites for SCR of NO by ammonia

Paper ID Volume ID Publish Year Pages File Format Full-Text
47314 46467 2010 7 PDF Available
Title
Vanadia supported on zeolites for SCR of NO by ammonia
Abstract

Vanadia supported on zeolites were prepared and characterized by N2 physisorption, FTIR, XRPD, and NH3-TPD methods. The influence of the Si/Al ratio on the total surface acidity of the catalysts as well as the optimum V2O5 content were studied and compared with the catalytic activity in the selective catalytic reduction (SCR) of NO with ammonia. The SCR activity was found to correlate directly with the total acidity of the catalysts and showed high poisoning resistivity after doping with potassium oxide (100 μmol/g). The poisoning resistance was due to unique combination of high surface area, acidity and micropore structure of the support. Apparently the support hosted the potassium oxide on the acid sites, thereby protecting the active vanadium species from poisoning. Zeolite based catalysts might therefore prove useful for SCR of NO in alkali- containing flue gases from, e.g. biomass fired power plants.

Keywords
Zeolites; SCR with ammonia; Potassium poisoning; Deactivation; NH3-TPD
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 97, Issues 3–4, 18 June 2010, Pages 333–339
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
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