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n-Decane dehydrogenation on Pt, PtSn and PtGe supported on spinels prepared by different methods of synthesis

Paper ID Volume ID Publish Year Pages File Format Full-Text
40055 45843 2013 11 PDF Available
Title
n-Decane dehydrogenation on Pt, PtSn and PtGe supported on spinels prepared by different methods of synthesis
Abstract

•Pt, PtSn and PtGe catalysts were studied in the n-decane dehydrogenation.•The support ZnAl2O4 was prepared by coprecipitation and mechanochemical synthesis (MS).•Its catalytic performances depended on the nature of the second metal.•PtSn catalysts showed better catalytic performance than the PtGe catalysts.•Catalysts prepared with ZnAl2O4 MS were more stable.

The catalytic performance of Pt, PtSn and PtGe supported on ZnAl2O4 obtained by mechanochemical synthesis (MS) or coprecipitation (COPR) is studied in the production of 1-decene from the n-decane dehydrogenation. The effect of preparation methods and Sn and Ge addition to Pt on the activity and selectivity was analyzed. The catalytic characterization was carried out by using XRD, Specific surface area, 2-propanol dehydration reaction, equilibrium pH, cyclohexane dehydrogenation (CHD), cyclopentane hydrogenolysis (CPH), TPR, H2 chemisorption, XPS, TPO, and TEM. Characterization studies indicate that the addition of Sn to the Pt metal phase modifies not only the catalytic properties, but deactivation and stability as well. PtSn catalysts on both spinels were more active, with lower activity fall than PtGe ones and the higher the Sn loading, the more noticeable this effect. Besides, PtSn catalysts supported on ZnAl2O4 MS showed a more stabilizing effect.

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Keywords
Spinel; Zinc aluminate; PtSn and PtGe catalysts; Mechanochemical synthesis; Coprecipitation
First Page Preview
n-Decane dehydrogenation on Pt, PtSn and PtGe supported on spinels prepared by different methods of synthesis
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 467, 2 October 2013, Pages 235–245
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis