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Carbon covered alumina prepared by the pyrolysis of sucrose: A promising support material for the supported Pt–Sn bimetallic dehydrogenation catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
54276 47003 2014 6 PDF Available
Title
Carbon covered alumina prepared by the pyrolysis of sucrose: A promising support material for the supported Pt–Sn bimetallic dehydrogenation catalysts
Abstract

•Carbon is a newly developed addition for dehydrogenation catalysts.•Pt–Sn/CCA catalysts showed better selectivity and stability.•Pt–Sn alloys can be formed on CCA surface even though Pt is small amount.

Sucrose was pyrolyzed on gamma alumina surface to prepare carbon covered alumina (CCA) material. Alumina and CCA supported Pt–Sn catalysts were prepared by the complex impregnation method under vacuum. Dehydrogenation of n-octadecane was performed to study the effect of carbon addition, Pt loading and Sn/Pt weight ratio on the catalytic dehydrogenation activity, selectivity and catalyst stability. BET, mercury porosimetry, XRD, CO-chemisorption, TPR and TG-DTA were used for the carrier and the corresponding catalyst characterization. The results showed that more carbon addition, Pt loading and higher Sn/Pt ratio are propitious to the mono-olefin selectivity and catalyst stability. Pt–Sn was easily formed on the Pt–Sn/CCA catalysts, especially when the Pt loading and Sn/Pt ratio were very high. To keep optimal dehydrogenation conversion, taking consideration to good selectivity and stability, the carbon content, Pt and Sn loading of Pt–Sn/CCA catalysts should be 8.37 wt.%, 0.5 wt.% and 3 wt.%, respectively.

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Keywords
Dehydrogenation; Carbon covered alumina (CCA); Pyrolysis; Pt–Sn catalysts; Sucrose
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Carbon covered alumina prepared by the pyrolysis of sucrose: A promising support material for the supported Pt–Sn bimetallic dehydrogenation catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 234, 1 October 2014, Pages 295–300
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