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Durability of Cu/SAPO-34 catalyst for NOx reduction by ammonia: Potassium and sulfur poisoning

Paper ID Volume ID Publish Year Pages File Format Full-Text
49512 46751 2015 5 PDF Available
Title
Durability of Cu/SAPO-34 catalyst for NOx reduction by ammonia: Potassium and sulfur poisoning
Abstract

•Cu/SAPO-34 owns much higher alkali poisoning resistance than V2O5/WO3–TiO2 catalyst.•K-impregnation affects active copper sites slightly due to pore structure of zeolite.•The formation of copper sulfates deactivates the catalyst at low temperatures.•Both the poisoned catalysts show higher NH3-SCR activities at high temperatures.

Cu/SAPO-34 catalyst prepared by a wetness impregnation method shows better low-temperature NH3-SCR performance and higher alkali poisoning resistance than V2O5/WO3–TiO2 catalyst, but it exhibits a weaker resistance to sulfur dioxide. Both the poisoning treatments improve the high-temperature NOx conversion but decrease the low-temperature performance of Cu/SAPO-34. The textural properties and surface acidity are affected by the poisoning treatments to some extent. Nevertheless, the reducibility of copper species is suggested to be a more important factor to determine the deNOx performance of the catalysts.

Graphical abstractThe effects of poisoning treatment on Cu/SAPO-34 synthesized by a wetness impregnation method improve the high-temperature activity and decrease the low-temperature activity.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Cu/SAPO-34; NH3-SCR; Potassium; Sulfur dioxide; Active sites; Acid sites
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Durability of Cu/SAPO-34 catalyst for NOx reduction by ammonia: Potassium and sulfur poisoning
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 59, 10 January 2015, Pages 35–39
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Online Support
Any Questions? feel free to contact us