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Copper exchanged ultrastable zeolite Y – A catalyst for NH3-SCR of NOx from stationary biogas engines

Paper ID Volume ID Publish Year Pages File Format Full-Text
55269 47046 2012 6 PDF Available
Title
Copper exchanged ultrastable zeolite Y – A catalyst for NH3-SCR of NOx from stationary biogas engines
Abstract

NOx emissions will need to be controlled from gas engines, which in the future could be using a syngas/producer gas as a fuel (generated from the gasification of biomass). In anticipation of this need, the activity of a copper-exchanged ultrastabilized zeolite Y was investigated, for the selective catalytic reduction of NOx. The catalyst performance and properties were compared with reference samples of Cu-exchanged un-stabilized Y and Cu exchanged ZSM-5 zeolites. Activity was related to the number and nature of active centers, which were determined by in situ FTIR and TPD experiments using CO, NO, and NH3 as probe molecules. In the test reaction the ultrastabilized Cu-USY catalyst showed high activity at low temperatures and offered high hydrothermal resistance, whilst the Cu-ZSM-5 catalyst demonstrated the highest overall activity. The observed low temperature activity of the ultrastabilized Cu-USY catalyst was linked to the high abundance of Cu+ sites, which were detected by in situ FTIR analyses using CO adsorption.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (229 K)Download as PowerPoint slideHighlights► Cu exchanged ultrastable Y zeolite (Cu-USY) of high NH3SCR conversion and selectivity toward N2. ► Low temperature activity of Cu-Y and Cu-USY observed (starting from 120 °C). ► High hydrothermal stability of ultrastable Cu-USY. ► The low energy Cu+ cetres observed in situ FTIR analyses of sorbed probe molecules link with low temperature activity of Y zeolites.

Keywords
NH3-SCR; Ultrastabilized zeolite Y; ZSM-5; Cu-exchanged zeolites; Structured reactors; Biogas engines
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Copper exchanged ultrastable zeolite Y – A catalyst for NH3-SCR of NOx from stationary biogas engines
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 191, Issue 1, 15 September 2012, Pages 6–11
Authors
, , , , , , , , , ,
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us