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Silica - supported tin oxides as heterogeneous acid catalysts for transesterification of soybean oil with methanol / Wenlei Xie in Industrial & engineering chemistry research, Vol. 51 N° 1 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 225-231 Titre : Silica - supported tin oxides as heterogeneous acid catalysts for transesterification of soybean oil with methanol Type de document : texte imprimé Auteurs : Wenlei Xie, Auteur ; Hongyan Wang, Auteur ; Li, Hui, Auteur Année de publication : 2012 Article en page(s) : pp. 225-231 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Transesterification  Acid  catalysis Résumé : In this work, the SnO2/SiO2 materials with various Sn loadings ranging from 1 to 16 wt % were prepared and used as heterogeneous acid catalysts for soybean oil transesterification to produce biodiesel. The catalyst with 8 wt % Sn loading and calcined at 873 K exhibited the best catalytic activity, giving an oil conversion of 81.7%. The dispersed amorphous SnO2 species on the silica surface are considered to be active sites for the transesterification reaction. The effect of reaction parameters such as catalyst amount, reaction temperature, reaction time, and methanol-to-oil ratio was investigated to optimize the transesterification conditions. It is shown that the free fatty acid (FFA) and water have no significant influence on the catalytic activity to the transesterification reaction. In addition, the heterogeneous acid catalyst was found to have high activities toward the esterification of FFAs. Furthermore, the catalyst could be recovered with a better reusability. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476465 [article] Silica - supported tin oxides as heterogeneous acid catalysts for transesterification of soybean oil with methanol [texte imprimé] / Wenlei Xie, Auteur ; Hongyan Wang, Auteur ; Li, Hui, Auteur . - 2012 . - pp. 225-231. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 225-231 Mots-clés : Transesterification  Acid  catalysis Résumé : In this work, the SnO2/SiO2 materials with various Sn loadings ranging from 1 to 16 wt % were prepared and used as heterogeneous acid catalysts for soybean oil transesterification to produce biodiesel. The catalyst with 8 wt % Sn loading and calcined at 873 K exhibited the best catalytic activity, giving an oil conversion of 81.7%. The dispersed amorphous SnO2 species on the silica surface are considered to be active sites for the transesterification reaction. The effect of reaction parameters such as catalyst amount, reaction temperature, reaction time, and methanol-to-oil ratio was investigated to optimize the transesterification conditions. It is shown that the free fatty acid (FFA) and water have no significant influence on the catalytic activity to the transesterification reaction. In addition, the heterogeneous acid catalyst was found to have high activities toward the esterification of FFAs. Furthermore, the catalyst could be recovered with a better reusability. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476465