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NO conversion in presence of O2, H2O and SO2: Improvement of a Pt/Al2O3 catalyst by Zr and Sn, and influence of the reducer C3H6 or C3H8

Paper ID Volume ID Publish Year Pages File Format Full-Text
52233 46867 2008 6 PDF Available
Title
NO conversion in presence of O2, H2O and SO2: Improvement of a Pt/Al2O3 catalyst by Zr and Sn, and influence of the reducer C3H6 or C3H8
Abstract

The aim of this work was to improve the SCR activity of a Pt/Al2O3 model catalyst by ZrO2 (20 wt%) and/or SnO2 (2 wt%) addition. The activity of the catalysts was measured in lean mixture containing C3H6 or C3H8, O2, H2O, CO2 and SO2 (0–700 ppm).With propene, ZrO2 and SnO2 addition improve the optimal NOx conversion (near 250 °C) and decrease the corresponding N2O selectivity, especially with SO2 in the feed stream (sulfated catalysts). For higher temperatures, the NOx conversion decrease is associated with the formation of nitric acid at the reactor outlet (25% nitrate selectivity at 300 °C). With propane, the NOx conversion is only attributable to the formation of nitric acid, no significant reduction was observed.

Keywords
SCR; C3H6; C3H8; SO2; Pt; SnO2; ZrO2
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NO conversion in presence of O2, H2O and SO2: Improvement of a Pt/Al2O3 catalyst by Zr and Sn, and influence of the reducer C3H6 or C3H8
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 5, 20 March 2008, Pages 664–669
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
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us