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Rapid In Situ Transesterification of Sunflower Oil / Jianli Zeng in Industrial & engineering chemistry research, Vol. 48 N°2 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°2 (Janvier 2009) . - p. 850–856 Titre : Rapid In Situ Transesterification of Sunflower Oil Type de document : texte imprimé Auteurs : Jianli Zeng, Auteur ; Xiaodong Wang, Auteur ; Bing Zhao, Auteur ; Jingcan Sun, Auteur ; Yuchun Wang, Auteur Année de publication : 2009 Article en page(s) : p. 850–856 Note générale : chemical engineering Langues : Anglais (eng) Mots-clés : Sunflower  Oil--  Transesterification Résumé : A rapid in situ transesterification process of sunflower oil with methanol assisted by diethoxymethane (DEM) is described in this article. DEM served as both extraction solvent and reaction promoter in the process. The effects of moisture content of sunflower seeds, catalyst category, molar ratio of catalyst/oil, molar ratio of methanol/oil, molar ratio of DEM/oil, reaction time, reaction temperature, and agitation speed on the in situ transesterification were investigated. The most important factors which influenced the crude biodiesel yield, free fatty acid (FFA) content, and fatty acid methyl ester (FAME) purity were the molar ratio of DEM/oil, molar ratio of catalyst/oil, and molar ratio of catalyst/oil, respectively. An empirical model of the rapid in situ transesterification process was established and used to determine the optimal reaction conditions. When the in situ transesterification was carried out at the molar ratio of catalyst/oil of 0.5:1, the molar ratio of methanol/oil of 101.39:1, the molar ratio of DEM/oil of 57.85:1, the agitation speed of 150 rpm, and reaction temperature of 20 °C, a product containing 97.7% FAME and 0.74% FFA was obtained within 13 min. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8008956 [article] Rapid In Situ Transesterification of Sunflower Oil [texte imprimé] / Jianli Zeng, Auteur ; Xiaodong Wang, Auteur ; Bing Zhao, Auteur ; Jingcan Sun, Auteur ; Yuchun Wang, Auteur . - 2009 . - p. 850–856. chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°2 (Janvier 2009) . - p. 850–856 Mots-clés : Sunflower  Oil--  Transesterification Résumé : A rapid in situ transesterification process of sunflower oil with methanol assisted by diethoxymethane (DEM) is described in this article. DEM served as both extraction solvent and reaction promoter in the process. The effects of moisture content of sunflower seeds, catalyst category, molar ratio of catalyst/oil, molar ratio of methanol/oil, molar ratio of DEM/oil, reaction time, reaction temperature, and agitation speed on the in situ transesterification were investigated. The most important factors which influenced the crude biodiesel yield, free fatty acid (FFA) content, and fatty acid methyl ester (FAME) purity were the molar ratio of DEM/oil, molar ratio of catalyst/oil, and molar ratio of catalyst/oil, respectively. An empirical model of the rapid in situ transesterification process was established and used to determine the optimal reaction conditions. When the in situ transesterification was carried out at the molar ratio of catalyst/oil of 0.5:1, the molar ratio of methanol/oil of 101.39:1, the molar ratio of DEM/oil of 57.85:1, the agitation speed of 150 rpm, and reaction temperature of 20 °C, a product containing 97.7% FAME and 0.74% FFA was obtained within 13 min. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8008956