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A potential substitution of noble metal Pt by perovskite LaCoO3 in ZrTiO4 supported lean-burn NOx trap catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
50943 46823 2010 4 PDF Available
Title
A potential substitution of noble metal Pt by perovskite LaCoO3 in ZrTiO4 supported lean-burn NOx trap catalysts
Abstract

The support ZrTiO4 and the lean-burn NOx trap (LNT) catalyst K/LaCoO3/ZrTiO4 were prepared by co-precipitation and successive impregnation, respectively. This catalyst exhibits much better NOx storage performance than the conventional Pt-containing catalyst K/Pt/ZrTiO4. Compared with Pt, the perovskite LaCoO3 possesses higher capability for NO to NO2 oxidation, giving a higher NOx storage capacity. NOx is mainly stored as nitrate at 350 °C over K/LaCoO3/ZrTiO4. Mild sulfation shows little effect on the structure and performance of this catalyst. Total substitution of Pt by perovskite LaCoO3 to lower the cost of LNT catalysts is feasible.

Graphical AbstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights►K/LaCoO3/ZrTiO4 is more capable for the oxidation of NO to NO2 than K/Pt/ZrTiO4.►K/LaCoO3/ZrTiO4 shows much larger NOx storage capacity (NSC) than K/Pt/ZrTiO4.►Mild sulfation shows small effect on the structure and property of K/LaCoO3/ZrTiO4.►It is potential for K/LaCoO3/ZrTiO4 to replace the Pt-based K/Pt/ZrTiO4 NSR catalyst.

Keywords
NOx trap; Supported perovskite; Potassium; Sulfation; Mechanism
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A potential substitution of noble metal Pt by perovskite LaCoO3 in ZrTiO4 supported lean-burn NOx trap catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 3, 30 November 2010, Pages 165–168
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