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Study of the stability of Pt/SiO2–Al2O3 catalysts in aqueous medium: Application for sorbitol transformation

Paper ID Volume ID Publish Year Pages File Format Full-Text
50741 46812 2011 5 PDF Available
Title
Study of the stability of Pt/SiO2–Al2O3 catalysts in aqueous medium: Application for sorbitol transformation
Abstract

Sorbitol transformation in aqueous medium can be used to produce alkanes from lignocellulosic sugars over a bifunctional catalyst, usually Pt/SiO2–Al2O3. However, the catalyst is modified by the hydrothermal medium. In this study, the separated effects of water and medium generated during sorbitol transformation reaction on a Pt/SiO2–Al2O3 catalyst have been investigated. Reaction products, in particular acidic ones, also alter catalyst properties. Catalyst pre-treatment by steaming appears to be an interesting way to obtain a catalyst which is less sensitive to liquid water in terms of platinum dispersion and textural properties. Steaming pre-treatment has no impact on selectivity. These investigations provide an incentive for the development of new sorbitol transformation catalysts more suitable under hydrothermal conditions.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Platinum sintering is faster in liquid water than in wet air. ► Steaming pre-treatment stabilises the catalyst further put in hydrothermal medium. ► Reaction medium has a stronger impact on catalyst properties than pure water medium. ► Steaming pre-treatment doesn't impact selectivities during sorbitol transformation.

Keywords
Sorbitol; Platinum; Silica–alumina; Aqueous medium; Hydrothermal stability; Sintering
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Study of the stability of Pt/SiO2–Al2O3 catalysts in aqueous medium: Application for sorbitol transformation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 15, Issue 1, 15 November 2011, Pages 18–22
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