fulltext.study @t Gmail

IR study of the interaction of phenol with oxides and sulfided CoMo catalysts for bio-fuel hydrodeoxygenation

Paper ID Volume ID Publish Year Pages File Format Full-Text
55696 47062 2011 4 PDF Available
Title
IR study of the interaction of phenol with oxides and sulfided CoMo catalysts for bio-fuel hydrodeoxygenation
Abstract

The adsorption of phenol on supported sulfide CoMo catalysts and on oxides is investigated using IR spectroscopy. On silica, phenol mainly interacts via hydrogen-bonding, whereas on alumina it dissociates on the acid–base pairs of this oxide leading to the formation of strongly adsorbed phenolates species. On a sulfided CoMo catalyst supported on alumina, phenol dissociates on the support but does not interact strongly with the sulfide phase. The accessibility of the various sites of the catalyst after phenol contact is investigated by CO adsorption monitored by IR spectroscopy. As expected, phenolate formation decreases the accessibility of support sites. In addition, a decrease of the sulfide site accessibility is also observed. This is indicative of an indirect poisoning of the sulfide edge sites by phenolate species anchored on the support and in the vicinity of sulfide slabs. Consequently, decreasing the amount or strength of the acid–base paired sites of the support should be a way to limit deactivation.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (107 K)Download as PowerPoint slideResearch highlights► On oxides presenting surface acid–base paired sites like alumina, phenol dissociates leading to the formation of strongly adsorbed phenates species. ► On a sulfided CoMo catalyst supported on alumina, phenol dissociates on the support but does not interact strongly with the sulfide phase. ► Phenate species on the alumina directly decreases the accessibility of support sites. ► An indirect poisoning of the sulfide slab sites by phenate species anchored on the support and in the vicinity of sulfide slabs is observed. ► Decreasing the amount or strength of the acid–base paired sites of the support should be a way to limit deactivation.

Keywords
Hydrodeoxygenation; IR spectroscopy; Sulfided CoMo/Al2O3; Phenol; Carbon monoxide
First Page Preview
IR study of the interaction of phenol with oxides and sulfided CoMo catalysts for bio-fuel hydrodeoxygenation
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 172, Issue 1, 25 August 2011, Pages 132–135
Authors
, , , , , ,
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