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Glycerol steam reforming for hydrogen production: Design of Ni supported catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
46467 46440 2012 8 PDF Available
Title
Glycerol steam reforming for hydrogen production: Design of Ni supported catalysts
Abstract

In this work the activity of Ni catalysts in hydrogen production by glycerol steam reforming was studied. Moreover the effect of the support (TiO2, SBA-15 and ZrO2) on the catalytic performance of Ni was evaluated. A strong effect of the support on the activity of the samples was detected. The Ni/TiO2 sample showed negligible activity mainly due to the low strength of anatase to keep nickel in the reduced state. In fact, both incorporation of Ni ions into the nanoanatase lattice and oxidation of the active phase to NiO under operating conditions were observed. A deactivation process was also found with the Ni/SBA-15 sample while the best results were achieved with the Ni/ZrO2 catalyst, showing no deactivation. After 20 h, the glycerol conversion was ∼72% and the H2 yield was ∼65%. The Ni/ZrO2 sample was even more active when tested at lower temperatures, although its performance was less stable. On the basis of the experimental results, it was evidenced that the nature of the support affects above all the stability of the active phase. In particular, strong interactions between the metal active phase and the support ensures stability, activity and selectivity of the catalyst in glycerol steam reforming reactions.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ni catalysts have been tested in glycerol steam reforming for H2 production. ► A strong effect of the support on the catalytic activity has been detected. ► TiO2 cannot stabilize metallic Ni species on the surface. ► SBA-15 collapses in the reaction conditions because of its low hydrothermal stability. ► ZrO2 exhibits the best performance and stabilizes Ni nanoparticles to a high degree.

Keywords
Hydrogen; Glycerol; Steam reforming; Biodiesel; Nickel
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 111–112, 12 January 2012, Pages 225–232
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