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Relevance of sulfiding pretreatment on the performance of Re/ZrO2 and Re/ZrO2-sulfated catalysts for the hydrodeoxygenation of guayacol

Paper ID Volume ID Publish Year Pages File Format Full-Text
41938 45905 2010 6 PDF Available
Title
Relevance of sulfiding pretreatment on the performance of Re/ZrO2 and Re/ZrO2-sulfated catalysts for the hydrodeoxygenation of guayacol
Abstract

The effect of the sulfiding mixture (H2/H2S and N2/H2S) over Re/ZrO2 and Re/ZrO2-sulfated catalysts in the hydrodeoxygenation (HDO) of 2-methoxyphenol (guayacol) in the presence of CS2 has been studied. The catalysts were prepared by wet impregnation and characterized by X-ray diffraction (XRD), BET surface area, X-ray photoelectron spectroscopy (XPS) and surface acidity techniques. The reaction was carried out in a batch reactor at 300 °C and 5 MPa. Reaction rates for both catalysts increased upon sulfiding in N2/H2S mixture. This N2/H2S mixture promotes the formation of ReS(2 − x) species over support surfaces and leads to an increase in the rate of direct demethoxylation and an enhancement in the phenol/cathecol ratio. An increase in the concentration of CS2 leads to an increase in the HDO and cathecol and inhibits the demethoxylation of guayacol.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (92 K)Download as PowerPoint slideResearch highlights▶ Effect of the sulfiding pretreatment (H2/H2S and N2/H2S mixture) on Re/ZrO2 and Re/ZrO2-sulfated catalysts for the hydrodeoxygenation of guayacol were investigated. ▶ It was found that Re/ZrO2 and Re/ZrO2-S catalysts sulfided under N2/H2S mixture increases the activity of guayacol hydrodeoxygenation. ▶ The increase in the H2S partial pressure decreases the activity of guayacol hydrodeoxygenation and changes the (phenol/cathecol) ratio, favoring the formation of cathecol.

Keywords
Re sulfided; Hydrodeoxygenation; ZrO2 support; Methoxyphenol
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Relevance of sulfiding pretreatment on the performance of Re/ZrO2 and Re/ZrO2-sulfated catalysts for the hydrodeoxygenation of guayacol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 384, Issues 1–2, 20 August 2010, Pages 78–83
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
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Any Questions? feel free to contact us