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The effect of the use of cerium-doped alumina on the performance of Pt/CeO2/Al2O3 and Pt/CeZrO2/Al2O3 catalysts on the partial oxidation of methane

Paper ID Volume ID Publish Year Pages File Format Full-Text
43674 45982 2008 8 PDF Available
Title
The effect of the use of cerium-doped alumina on the performance of Pt/CeO2/Al2O3 and Pt/CeZrO2/Al2O3 catalysts on the partial oxidation of methane
Abstract

The effect of the use of cerium (1 wt%)-doped alumina on the performance of Pt/Al2O3, Pt/CeO2/Al2O3 and Pt/CeZrO2/Al2O3 catalysts on the partial oxidation of methane (POM) was evaluated. The catalysts were characterized by X-ray diffraction (XRD), BET surface area and temperature-programmed reduction (TPR). Platinum dispersion was estimated through cyclohexane dehydrogenation. Pt/CeZrO2/Al-doped catalyst showed the best performance on the POM. XRD analysis revealed that the previous addition of ceria to alumina led to the formation of a homogeneous solid solution, which exhibited a high-oxygen storage capacity. The good activity and stability of this material was associated to its higher metal dispersion, higher oxygen storage capacity and larger degree of coverage of alumina by CeZrO2 oxide, which increase the effectiveness of the carbon cleaning mechanism.

Graphical abstractThe effect of the use of cerium (1 wt%)-doped alumina on the performance of Pt/CeO2/Al2O3 and Pt/CeZrO2/Al2O3 catalysts on the partial oxidation of methane was evaluated. The doped alumina-supported catalysts exhibited the best performance on partial oxidation of methane due to a proper balance between a good metal dispersion, high-oxygen storage capacity and a good degree of coverage of alumina. (○) Pt/Al-1173, (●) Pt/Al-doped, (▵) Pt/CeO2/Al-1173, (▴) Pt/CeO2/Al-doped, (□) Pt/CeZrO2/Al-1173 and (■) Pt/CeZrO2/Al-doped. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Partial oxidation of methane; Cerium-doped alumina; Pt/CeO2/Al2O3 and Pt/CeZrO2/Al2O3 catalysts; Syngas production; Gas-to-liquid technology
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The effect of the use of cerium-doped alumina on the performance of Pt/CeO2/Al2O3 and Pt/CeZrO2/Al2O3 catalysts on the partial oxidation of methane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 335, Issue 2, 8 February 2008, Pages 145–152
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