Liquid-phase hydrogenation of crotonaldehyde over platinum- and palladium-based catalysts / Betiana C. Campo in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10234–10239 Titre : Liquid-phase hydrogenation of crotonaldehyde over platinum- and palladium-based catalysts Type de document : texte imprimé Auteurs : Betiana C. Campo, Auteur ; María A. Volpe, Auteur ; Carlos E. Gigola, Auteur Année de publication : 2010 Article en page(s) : pp. 10234–10239 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Liquid-Phase--Hydrogenation--Crotonaldehyde--Platinum--Palladium-Based--Catalysts Résumé : The selective hydrogenation of crotonaldehyde in liquid phase, at a temperature of 353 K and a H2 pressure of 400 kPa, is studied over different palladium- and platinum-based catalysts (Pd−Pb/α-Al2O3, Pd−Zn/α-Al2O3, Pd/ZnO, and two Pt/ZnO samples, prepared from Pt(NH3)4(NO3)2 and H2PtCl6, respectively). The intrinsic selectivity of palladium cannot be modified by alloying or following a promotion with a second metal, and the selectivity to crotyl alcohol measured over palladium-based samples is nil or extremely low. The selectivity corresponding to the Pt/ZnO catalysts increases with the time-on-stream reaching high levels. The formation of a Pt−Zn alloy is the origin of the enhanced selectivity toward crotyl alcohol; this effect is more pronounced for the sample that has been prepared from H2PtCl6. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901217r [article] Liquid-phase hydrogenation of crotonaldehyde over platinum- and palladium-based catalysts [texte imprimé] / Betiana C. Campo, Auteur ; María A. Volpe, Auteur ; Carlos E. Gigola, Auteur . - 2010 . - pp. 10234–10239. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10234–10239 Mots-clés : Liquid-Phase--Hydrogenation--Crotonaldehyde--Platinum--Palladium-Based--Catalysts Résumé : The selective hydrogenation of crotonaldehyde in liquid phase, at a temperature of 353 K and a H2 pressure of 400 kPa, is studied over different palladium- and platinum-based catalysts (Pd−Pb/α-Al2O3, Pd−Zn/α-Al2O3, Pd/ZnO, and two Pt/ZnO samples, prepared from Pt(NH3)4(NO3)2 and H2PtCl6, respectively). The intrinsic selectivity of palladium cannot be modified by alloying or following a promotion with a second metal, and the selectivity to crotyl alcohol measured over palladium-based samples is nil or extremely low. The selectivity corresponding to the Pt/ZnO catalysts increases with the time-on-stream reaching high levels. The formation of a Pt−Zn alloy is the origin of the enhanced selectivity toward crotyl alcohol; this effect is more pronounced for the sample that has been prepared from H2PtCl6. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901217r

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