TY - JOUR
T1 - Analysis of the HDS of 4,6-DMDBT in the presence of naphthalene and carbazole over NiMo/Al2O3-SiO2(x) catalysts
AU - Sánchez-Minero, Felipe
AU - Ramírez, Jorge
AU - Gutiérrez-Alejandre, Aída
AU - Fernández-Vargas, César
AU - Torres-Mancera, Pablo
AU - Cuevas-Garcia, Rogelio
PY - 2008/4
Y1 - 2008/4
N2 - NiMo catalysts were prepared on γ-Al2O3 modified with SiO2 (0 and 10 wt% SiO2). Catalysts were characterized by HRTEM in sulfided state and evaluated in the hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene (4,6-DMDBT), hydrogenation (HYD) of naphthalene, hydrodenitrogenation (HDN) of carbazole and in the simultaneous reaction of 4,6-DMDBT-naphthalene-carbazole. The kinetic parameters of Langmuir-Hinshelwood type equations for all the reaction systems were estimated. Although naphthalene and carbazole present a competitive inhibition effect for the HDS of 4,6-DMDBT, the inhibiting effect of naphthalene was mainly due to its high concentration, whereas the inhibition caused by carbazole was due to its strong adsorption over the catalytic active sites. The addition of SiO2 to the catalysts enhanced the hydrogenation activity and therefore the HDS of 4,6-DMDBT, HYD of naphthalene and HDN of carbazole leading to more active catalysts when a mixture of the three compounds was hydrotreated.
AB - NiMo catalysts were prepared on γ-Al2O3 modified with SiO2 (0 and 10 wt% SiO2). Catalysts were characterized by HRTEM in sulfided state and evaluated in the hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene (4,6-DMDBT), hydrogenation (HYD) of naphthalene, hydrodenitrogenation (HDN) of carbazole and in the simultaneous reaction of 4,6-DMDBT-naphthalene-carbazole. The kinetic parameters of Langmuir-Hinshelwood type equations for all the reaction systems were estimated. Although naphthalene and carbazole present a competitive inhibition effect for the HDS of 4,6-DMDBT, the inhibiting effect of naphthalene was mainly due to its high concentration, whereas the inhibition caused by carbazole was due to its strong adsorption over the catalytic active sites. The addition of SiO2 to the catalysts enhanced the hydrogenation activity and therefore the HDS of 4,6-DMDBT, HYD of naphthalene and HDN of carbazole leading to more active catalysts when a mixture of the three compounds was hydrotreated.
KW - 4,6-DMDBT
KW - Carbazole
KW - Hydrodesulfurization
KW - Hydrogenation
KW - L-H equations
KW - Naphthalene
KW - NiMo/AlO-SiO catalysts
UR - http://www.scopus.com/inward/record.url?scp=41149134259&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2007.12.018
DO - 10.1016/j.cattod.2007.12.018
M3 - Artículo
SN - 0920-5861
VL - 133-135
SP - 267
EP - 276
JO - Catalysis Today
JF - Catalysis Today
IS - 1-4
ER -