TY - JOUR
T1 - A comparative study on the effect of promoter content of hydrodesulfurization catalysts at different evaluation scales
AU - Leyva, Carolina
AU - Ancheyta, Jorge
AU - Rana, Mohan S.
AU - Marroquín, Gustavo
N1 - Funding Information:
The authors would like to thank Instituto Mexicano del Petroleo for financial support.
PY - 2007/6
Y1 - 2007/6
N2 - CoMo and NiMo supported Al2O3 catalysts have been investigated for hydrotreating of model molecule as well as industrial feedstock. Activity studies were carried out for thiophene and SRGO hydrodesulfurization (HDS) in an atmospheric pressure and batch reactor respectively. These activities on sulfided catalysts were evaluated as a function of promoter content [M/(M + Mo) = 0.30, 0.34, 0.39; M = Co or Ni] using fixed (ca. 8 wt.%) molybdenum content. The promoted catalysts were characterized by textural properties, XRD, and temperature programmed reduction (TPR). TPR spectra of the Co and Ni promoter catalysts showed that Ni promotes the easy reduction of Mo species compared with Co. With the variation of promoter content NiMo catalyst was found to be superior to CoMo catalyst for gas oil HDS, while at low-promoter content the opposite trend was observed for HDS of thiophene. The behavior was attributed to the several reaction mechanisms involved for gas oil HDS. A nice relationship was obtained for hydrodesulfurized gas oil refractive index (RI) and aromatic content, which corresponds to the Ni hydrogenation property.
AB - CoMo and NiMo supported Al2O3 catalysts have been investigated for hydrotreating of model molecule as well as industrial feedstock. Activity studies were carried out for thiophene and SRGO hydrodesulfurization (HDS) in an atmospheric pressure and batch reactor respectively. These activities on sulfided catalysts were evaluated as a function of promoter content [M/(M + Mo) = 0.30, 0.34, 0.39; M = Co or Ni] using fixed (ca. 8 wt.%) molybdenum content. The promoted catalysts were characterized by textural properties, XRD, and temperature programmed reduction (TPR). TPR spectra of the Co and Ni promoter catalysts showed that Ni promotes the easy reduction of Mo species compared with Co. With the variation of promoter content NiMo catalyst was found to be superior to CoMo catalyst for gas oil HDS, while at low-promoter content the opposite trend was observed for HDS of thiophene. The behavior was attributed to the several reaction mechanisms involved for gas oil HDS. A nice relationship was obtained for hydrodesulfurized gas oil refractive index (RI) and aromatic content, which corresponds to the Ni hydrogenation property.
KW - Gas oil
KW - Hydrodesulfurization catalyst
KW - Thiophene
UR - http://www.scopus.com/inward/record.url?scp=33846503154&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2006.05.032
DO - 10.1016/j.fuel.2006.05.032
M3 - Artículo
SN - 0016-2361
VL - 86
SP - 1232
EP - 1239
JO - Fuel
JF - Fuel
IS - 9 SPEC. ISS.
ER -