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

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• 作者：Andrey  ; Popov ; Elena  ; Kondratieva ; Jean-Pierre  ; Gilson ; Laurence  ; Mariey ; Arnaud  ; Travert ; Francoise  ; Maugé ;   ; ;   ; ^{francoise.mauge@ensicaen.fr}
• 关键词：Hydrodeoxygenation ; IR spectroscopy ; Sulfided CoMo/Al₂O₃ ; Phenol ; Carbon monoxide
• 刊名：Catalysis Today
• 出版年：2011
• 出版时间：25 August 2011
• 年：2011
• 卷：172
• 期：1
• 页码：132-135
• 全文大小：354 K

文摘

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¨Cbase 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¨Cbase paired sites of the support should be a way to limit deactivation.