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Investigation of Cs–Cu/ZrO2 systems for simultaneous NOx reduction and carbonaceous particles oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
55283 47046 2012 6 PDF Available
Title
Investigation of Cs–Cu/ZrO2 systems for simultaneous NOx reduction and carbonaceous particles oxidation
Abstract

The effect of Cs and Cu contents in Cs–Cu/ZrO2 catalysts has been studied in the simultaneous abatement of NOx and carbon black (CB), used as a model of soot. Cu/ZrO2 and Cs–Cu/ZrO2 catalysts with a low Cs content are moderately active but show a beneficial role of NOx in CB elimination. Cs–Cu/ZrO2 catalysts with high amount of cesium are the more active systems towards both CB oxidation and NOx reduction. The increase in the amount of Cs leads to the formation of a higher proportion of CuO crystallites which are active for CB oxidation. Cesium in Cs–Cu/ZrO2 also acts as a promoter favouring the contact between reactants: on the first hand it increases the exchange surface between CB and the catalyst surface and on the other hand, it enhances the NOx adsorption capacity of Cs–Cu/ZrO2 and the further NOx reduction.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (208 K)Download as PowerPoint slideHighlights► Effect of Cs and Cu contents in Cs–Cu/ZrO2 catalysts for simultaneous NOx and soot removal. ► High activity of Csx–Cuy/ZrO2 with high Cs content. ► Cesium favours the contact between soot and catalyst surface. ► NO2 formation hindered in the presence of Cs but enhancement of NOx storage capacity of catalysts.

Keywords
NOx reduction; Soot oxidation; Cs–Cu/ZrO2 catalysts; Alkali metals; Copper
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Investigation of Cs–Cu/ZrO2 systems for simultaneous NOx reduction and carbonaceous particles oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 191, Issue 1, 15 September 2012, Pages 90–95
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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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