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Comparison studies on sintering phenomenon of diesel oxidation catalyst depending upon aging conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
55540 47056 2012 6 PDF Available
Title
Comparison studies on sintering phenomenon of diesel oxidation catalyst depending upon aging conditions
Abstract

Regulations of diesel engine exhaust gas were required vehicles of close to zero emission. It should be noted that diesel oxidation catalysts (DOCs) can be easily sintered by catalytic combustion using a high-temperature exhaust gas. The objectives of this study were to prepare correlation surface area of a Pt-based DOC with variously aging history and analyze its activity decay for the oxidation of NO. The result of this study showed that the deactivation mechanism of the prepared catalyst differs with thermal aging and oxidative thermal aging. It is sintering of DOC has two types activity decay on the oxidative thermal aging by sintering of active metal at shorted aging time and sintering of support after arbitrary aging time. The sintering of Pt was shown by TEM and XRD, and the sintering of the support structure was verified by XPS and XRD line-broadening. We conducted a study to determine the relationship between the sintering of the DOC and a loading amount of Pt.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (165 K)Download as PowerPoint slideHighlights► A correlation of NO oxidation ability and BET surface area on diesel oxidation catalyst. ► A study of deactivation phenomena of diesel oxidation catalyst on NO oxidation. ► A comparison of NO oxidation ability on diesel oxidation catalyst with a loading amount of Pt.

Keywords
NO oxidation; Deactivation; Sintering; Decay
First Page Preview
Comparison studies on sintering phenomenon of diesel oxidation catalyst depending upon aging conditions
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 185, Issue 1, 20 May 2012, Pages 296–301
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis