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Textural–structural properties and soot oxidation activity of MnOx-CeO2 mixed oxides

Paper ID Volume ID Publish Year Pages File Format Full-Text
50519 46800 2011 4 PDF Available
Title
Textural–structural properties and soot oxidation activity of MnOx-CeO2 mixed oxides
Abstract

A series of MnOx-CeO2 mixed oxides were prepared using a sol-gel method followed by calcinations at various temperatures. The soot oxidation activities were measured in different NO concentrations under loose contact conditions. A quasi-parabolic curve is observed for the apparent dependency of activity on the catalyst surface area. As the surface area is below 8 m2/g, the soot oxidation is limited by the availability of NO2 due to the separation and sintering of the mixed oxides. The rate-determining step turns to be NO2 reaction with soot for the high-surface-area catalysts.

Graphical AbstractFigure optionsDownload full-size imageDownload as PowerPoint slideDependency of soot oxidation and NO2 production on the BET surface area of MnOx-CeO2 mixed oxides.Research Highlights►A threshold of the surface area of MnOx-CeO2 is 8 m2/g. ►Soot oxidation is limited by NO oxidation for the low-surface-area catalysts. ►It is restricted by NO2–soot reaction for the high-surface-area catalysts. ►NO2 production capacity is determined by both textural and structural properties.

Keywords
MnOx-CeO2; BET surface area; Phase separation; Sintering; Soot oxidation; NO2 production
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Textural–structural properties and soot oxidation activity of MnOx-CeO2 mixed oxides
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 5, 5 January 2011, Pages 345–348
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