Kinetic study of the HDS of 4,6-DMDBT over NiMo/Al2O3-SiO2(x) catalysts / Felipe Sánchez-Minero in Industrial & engineering chemistry research, Vol. 48 N°3 (Février 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1178–1185 Titre : Kinetic study of the HDS of 4,6-DMDBT over NiMo/Al2O3-SiO2(x) catalysts Type de document : texte imprimé Auteurs : Felipe Sánchez-Minero, Auteur ; Jorge Ramírez, Auteur ; Rogelio Cuevas-Garcia, Auteur ; Aída Gutiérrez-Alejandre, Auteur Année de publication : 2009 Article en page(s) : p. 1178–1185 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Kinetic study NiMo catalyst Résumé : Two NiMo/Al2O3-SiO2(x) catalysts with different SiO2 content in the support (0 and 10 wt %) were evaluated at four temperatures (560, 573, 585, and 598 K) in the HDS of 4,6-DMDBT. The reaction products (DMDP, MCHT, and DMDCH) were analyzed to establish a reaction scheme. Then, a kinetic study using Langmuir−Hinshelwood (LH) type equations was carried out to estimate the changes in the rate constants for the direct desulfurization and hydrogenation reaction routes involved in the HDS of 4,6-DMDBT. The results show that incorporation of SiO2 to the catalyst support increases the HDS of 4,6-DMDBT and that this increase is mainly due to a greater contribution of the hydrogenation reaction. The apparent activation energy and pre-exponential factor estimated for both reaction routes indicated an increase in the number of active sites related to the hydrogenation route when SiO2 is present in the catalyst. This result was corroborated by means of NO adsorption. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8005808 [article] Kinetic study of the HDS of 4,6-DMDBT over NiMo/Al2O3-SiO2(x) catalysts [texte imprimé] / Felipe Sánchez-Minero, Auteur ; Jorge Ramírez, Auteur ; Rogelio Cuevas-Garcia, Auteur ; Aída Gutiérrez-Alejandre, Auteur . - 2009 . - p. 1178–1185. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1178–1185 Mots-clés : Kinetic study NiMo catalyst Résumé : Two NiMo/Al2O3-SiO2(x) catalysts with different SiO2 content in the support (0 and 10 wt %) were evaluated at four temperatures (560, 573, 585, and 598 K) in the HDS of 4,6-DMDBT. The reaction products (DMDP, MCHT, and DMDCH) were analyzed to establish a reaction scheme. Then, a kinetic study using Langmuir−Hinshelwood (LH) type equations was carried out to estimate the changes in the rate constants for the direct desulfurization and hydrogenation reaction routes involved in the HDS of 4,6-DMDBT. The results show that incorporation of SiO2 to the catalyst support increases the HDS of 4,6-DMDBT and that this increase is mainly due to a greater contribution of the hydrogenation reaction. The apparent activation energy and pre-exponential factor estimated for both reaction routes indicated an increase in the number of active sites related to the hydrogenation route when SiO2 is present in the catalyst. This result was corroborated by means of NO adsorption. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8005808

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