| Titre : | Hydrocarbon fuels production from hydrocracking of soybean oil using transition metal carbides and nitrides supported on ZSM - 5 (2012) |
| Auteurs : | Huali Wang, Auteur ; Shuli Yan, Auteur ; Steven O. Salley, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 30, Août 2012) |
| Article en page(s) : | pp. 10066-10073 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | 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 |
