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Article Dans Une Revue Catalysis Communications Année : 2011

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

Résumé

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.

Dates et versions

hal-01342616 , version 1 (06-07-2016)

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Citer

Lea Vilcocq, Cabiac A., C. Especel, S. Lacombe, D. Duprez. Study of the stability of Pt/SiO2-Al2O3 catalysts in aqueous medium: Application for sorbitol transformation . Catalysis Communications, 2011, 15, pp.18-22. ⟨10.1016/j.catcom.2011.08.002⟩. ⟨hal-01342616⟩
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