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Biodiesel synthesis by simultaneous esterification and transesterification using oleophilic acid catalyst / Yi-Shen Lien in Industrial & engineering chemistry research, Vol. 49 N° 5 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2118–2121 Titre : Biodiesel synthesis by simultaneous esterification and transesterification using oleophilic acid catalyst Type de document : texte imprimé Auteurs : Yi-Shen Lien, Auteur ; Li-Shan Hsieh, Auteur ; Jeffrey C. S. Wu, Auteur Année de publication : 2010 Article en page(s) : pp. 2118–2121 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Biodiesel;  Esterification;  Transesterification;  Oleophilic;  Solid-acid  catalysts Résumé : Solid-acid catalysts can perform transesterification and esterification simultaneously so that free fatty acids (FFAs) in oil can be converted into biodiesel to avoid the disposal of biomaterial. A carbon catalyst was prepared by pyrolyzing glucose at 400 °C under a N2 stream. The catalyst was further sulfated using concentrated sulfuric acid. Transesterification of soybean oil and methanol was carried out at 150 °C and 1.7 MPa in a pressurized autoclave. More than 90% biodiesel yield was achieved within 2 h with a molar ratio of methanol to soybean oil of 30:1. The total biodiesel yield for the mixture of soybean oil and palmitic acid decreased to 85% when 20 wt % palmitic acid was used. A rate equation based on the Langmuir−Hishelwood mechanism was established to describe the kinetic behavior of transesterification. The adsorption equilibrium constant of soybean oil was higher than those of the other species, implying an oleophilic surface of the sulfated carbon catalyst. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901496h [article] Biodiesel synthesis by simultaneous esterification and transesterification using oleophilic acid catalyst [texte imprimé] / Yi-Shen Lien, Auteur ; Li-Shan Hsieh, Auteur ; Jeffrey C. S. Wu, Auteur . - 2010 . - pp. 2118–2121. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2118–2121 Mots-clés : Biodiesel;  Esterification;  Transesterification;  Oleophilic;  Solid-acid  catalysts Résumé : Solid-acid catalysts can perform transesterification and esterification simultaneously so that free fatty acids (FFAs) in oil can be converted into biodiesel to avoid the disposal of biomaterial. A carbon catalyst was prepared by pyrolyzing glucose at 400 °C under a N2 stream. The catalyst was further sulfated using concentrated sulfuric acid. Transesterification of soybean oil and methanol was carried out at 150 °C and 1.7 MPa in a pressurized autoclave. More than 90% biodiesel yield was achieved within 2 h with a molar ratio of methanol to soybean oil of 30:1. The total biodiesel yield for the mixture of soybean oil and palmitic acid decreased to 85% when 20 wt % palmitic acid was used. A rate equation based on the Langmuir−Hishelwood mechanism was established to describe the kinetic behavior of transesterification. The adsorption equilibrium constant of soybean oil was higher than those of the other species, implying an oleophilic surface of the sulfated carbon catalyst. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901496h