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Hydrogen production by glycerol steam reforming with Pt/SiO2 and Ni/SiO2 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
55704 47062 2011 6 PDF Available
Title
Hydrogen production by glycerol steam reforming with Pt/SiO2 and Ni/SiO2 catalysts
Abstract

Pt and Ni catalysts supported on SiO2 were prepared with different metal content in order to apply them in steam reforming of glycerol at temperatures between 350 °C and 450 °C.Conditions of temperature and space time (τ) that can provide the total conversion of glycerol to gaseous products were found.Based on the identification of liquids or reaction intermediates, we found that Ni and Pt have the same reaction steps. Thus, a schematic representation of reaction pathways was proposed involving successive steps of dehydrogenation and C–C bond cleavage, leading to H2 and CO.The different levels of conversion, selectivity and stability of catalysts were analyzed. Pt catalysts were more active and stable than Ni catalysts. Ni catalysts showed differences in the selectivity to gaseous products due to the increased contribution of the WGS reaction.The Pt catalysts have shown a total conversion to gaseous products at 450 °C, without deactivation during the 40 reaction hours.

Graphical abstractResults of activity versus time on stream at 350 °C and 450 °C (τ = 0.88 min).Figure optionsDownload full-size imageDownload high-quality image (127 K)Download as PowerPoint slideHighlights► Different Ni and Pt catalysts supported on SiO2 have been studied in this article. ► The best results were obtained with 2Pt at 450 °C and τ = 0.88 min, producing a completely gaseous stream of 70% H2, 6.4% CO, 0.6% CH4 and 23% CO2. ► The 5Ni catalyst at 450 °C and τ = 1.66 min allowed to obtain only 3% CO. ► The stability test showed that the 2Pt catalyst allows total conversion to gas, without deactivation during 40 h on stream at 350 °C.

Keywords
Hydrogen; Glycerol; Steam reforming; Platinum; Nickel
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Hydrogen production by glycerol steam reforming with Pt/SiO2 and Ni/SiO2 catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 172, Issue 1, 25 August 2011, Pages 183–188
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