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Surface and structural features of Pt/CeO2-La2O3-Al2O3 catalysts for partial oxidation and steam reforming of methane

Paper ID Volume ID Publish Year Pages File Format Full-Text
46878 46452 2011 16 PDF Available
Title
Surface and structural features of Pt/CeO2-La2O3-Al2O3 catalysts for partial oxidation and steam reforming of methane
Abstract

Mixed xCeO2-yLa2O3-Al2O3 oxides (where x + y = 12 wt%) were prepared by sol–gel method. It was shown that the mixed oxides are suitable carriers for supported Pt catalysts. The catalytic performances of the catalysts were evaluated in the reaction of stem methane reforming (SMR) and partial oxidation of methane (POM). The effect of the support kind on the surface and structural properties, as well as on the redox and catalytic behavior of the catalyst was studied. It was shown that the coexistence of the Pt0/Ptδ+ and Ce4+/Ce3+ redox couples leads to the increase of the CH4 conversion and carbon resistance over Pt catalysts. The CeO2-containing catalysts showed the highest TOFCH4TOFCH4 values in SMR in spite of the low metal dispersion that is related to the high capacity of the surface to carbon cleaning caused by the highest oxygen mobility at metal–support interface. The strong initial deactivation of alumina-supported Pt catalyst in POM was related to Pt sintering.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The effect of Ce(La) content on the structure and surface properties of Pt/CeO2-La2O3-Al2O3 catalysts was studied. ► Mixed oxides supports were obtained by sol–gel method. ► High CeO2-loaded Pt catalysts showed the best performance in POM and SMR.

Keywords
Sol–gel method; Pt catalysts; Cerium oxide; Lanthanum oxide; Steam methane reforming; Characterization; XANES
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Surface and structural features of Pt/CeO2-La2O3-Al2O3 catalysts for partial oxidation and steam reforming of methane
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 107, Issues 3–4, 21 September 2011, Pages 221–236
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