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A comparison of sol–gel and impregnated Pt or/and Ni based γ-alumina catalysts for bioglycerol aqueous phase reforming

Paper ID Volume ID Publish Year Pages File Format Full-Text
46106 46429 2012 14 PDF Available
Title
A comparison of sol–gel and impregnated Pt or/and Ni based γ-alumina catalysts for bioglycerol aqueous phase reforming
Abstract

Two series of Pt or/and Ni-based γ-alumina catalysts were prepared using sol–gel and conventional impregnation methods. Their activities were tested in the aqueous phase reforming of glycerol. All catalysts were also characterized by different techniques such as: ICP, BET, TPR-H2, in situ XPS and XRD to study their textural and physicochemical properties. The effect of preparation method, nature of active phase and possible cooperative effect between Pt and Ni in catalytic performance have been the focus of this investigation. The results obtained showed that sol–gel catalysts present better catalytic properties. TPR-H2, XPS and XRD showed that sol–gel PtNiAl catalyst contain well dispersed active phases and present high resistance against sintering leading to better and more stable catalytic activities, especially at moderate temperature/pressure conditions. As a result, sol–gel PtNi catalysts allowed higher reforming rates (3–8 times) to gaseous products than PtNi catalysts prepared by incipient wetness impregnation. This better behavior can be explained by the enhancement of textural properties, higher active phases dispersion and cooperative effect between Pt and Ni elements.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Pt/Ni based γ-Al2O3 catalysts for H2 production by APR of bioglycerol was studied. ► SGB method allows to PtNiAl catalyst with high surface area/porosity and good dispersion. ► Cooperative effect between Pt and Ni provide a better performance of PtNiAl catalysts. ► The APR behavior of the catalysts is more stable at moderate temperature/pressure reactions. ► Pt promotes H2-rich gas, while Ni is more selective to alkanes, but PtNi led to an intermediate behavior.

Keywords
Platinum-nickel catalysts; Sol–gel method; Aqueous phase reforming; Bioglycerol; Hydrogen
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A comparison of sol–gel and impregnated Pt or/and Ni based γ-alumina catalysts for bioglycerol aqueous phase reforming
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 125, 21 August 2012, Pages 516–529
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