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Hydrocarbon fuels production from hydrocracking of soybean oil using transition metal carbides and nitrides supported on ZSM - 5 / Huali Wang in Industrial & engineering chemistry research, Vol. 51 N° 30 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 10066-10073 Titre : Hydrocarbon fuels production from hydrocracking of soybean oil using transition metal carbides and nitrides supported on ZSM - 5 Type de document : texte imprimé Auteurs : Huali Wang, Auteur ; Shuli Yan, Auteur ; Steven O. Salley, Auteur Année de publication : 2012 Article en page(s) : pp. 10066-10073 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydrocracking  Production  Fuel Résumé : The effects of process parameters and Ni/Mo atomic ratio on catalytic hydrocracking of soybean oil were investigated using the carbide or nitride forms of Ni/Mo supported on ZSM-5 catalysts. Essentially, a complete conversion of the triglycerides was observed at 650 psi and 360―450 °C. A low reaction temperature (360 °C) resulted in a significant change in selectivity toward hydrocarbon fuels. After a 4 day reaction, only 3―5% of hydrocarbon fuels were produced together with considerable amount of carboxyl acids (very high acid number up to 140 mg KOH/g). The gaseous phase products at 450 °C indicated that the nitride catalyst favors a methanation reaction more than the carbide catalyst by producing a larger amount of methane in the gaseous product. At a lower liquid hourly space velocity (1 h―1), about 70 wt % of gasoline to diesel range hydrocarbons were obtained in the organic liquid products compared to 25 wt % at 2 and 3 h―1. Increasing the Ni content in the catalyst improves the hydrogenation ability of the catalyst, since Ni is known to activate hydrogen and transfer protons and electrons to molybdenum. A larger fraction of gasoline was produced in the organic liquid product while similar jet and diesel range hydrocarbons were obtained by increasing the Ni/Mo atomic ratio from 0 to 1.5. However, a decreased fraction of the organic product was generated with an increasing amount of Ni content in the catalyst. Overall, the highest yield of hydrocarbon fuels (about 50 wt %) was obtained when the Ni/Mo molar ratio was 0.5. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201420 [article] Hydrocarbon fuels production from hydrocracking of soybean oil using transition metal carbides and nitrides supported on ZSM - 5 [texte imprimé] / Huali Wang, Auteur ; Shuli Yan, Auteur ; Steven O. Salley, Auteur . - 2012 . - pp. 10066-10073. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 10066-10073 Mots-clés : Hydrocracking  Production  Fuel Résumé : The effects of process parameters and Ni/Mo atomic ratio on catalytic hydrocracking of soybean oil were investigated using the carbide or nitride forms of Ni/Mo supported on ZSM-5 catalysts. Essentially, a complete conversion of the triglycerides was observed at 650 psi and 360―450 °C. A low reaction temperature (360 °C) resulted in a significant change in selectivity toward hydrocarbon fuels. After a 4 day reaction, only 3―5% of hydrocarbon fuels were produced together with considerable amount of carboxyl acids (very high acid number up to 140 mg KOH/g). The gaseous phase products at 450 °C indicated that the nitride catalyst favors a methanation reaction more than the carbide catalyst by producing a larger amount of methane in the gaseous product. At a lower liquid hourly space velocity (1 h―1), about 70 wt % of gasoline to diesel range hydrocarbons were obtained in the organic liquid products compared to 25 wt % at 2 and 3 h―1. Increasing the Ni content in the catalyst improves the hydrogenation ability of the catalyst, since Ni is known to activate hydrogen and transfer protons and electrons to molybdenum. A larger fraction of gasoline was produced in the organic liquid product while similar jet and diesel range hydrocarbons were obtained by increasing the Ni/Mo atomic ratio from 0 to 1.5. However, a decreased fraction of the organic product was generated with an increasing amount of Ni content in the catalyst. Overall, the highest yield of hydrocarbon fuels (about 50 wt %) was obtained when the Ni/Mo molar ratio was 0.5. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201420