Abstract
Unsupported catalysts based on nickel, cobalt, tungsten, and molybdenum were prepared by sulphurization of Ni, Co, W, and Mo oxides. All catalysts were tested in hydrodesulphurization of dibenzothiophene reaction. The best activity was attained with a sample based on W (5.64 × 1016 molecules/s m2). The best selectivity for biphenyl (70.14 %) was achieved with Ni17S18. Materials were characterized by X-ray diffraction and surface area measurements.
Graphical Abstract
Reaction network for hydrodesulphurization (HDS) of dibenzotiophene (DBT) by direct desulphurization pathway (DDS) and hydrogenating pathway (HYD) to produce biphenyl (BP) and cyclohexyl-benzene (CHB). nH2 = hydrogen excess at 3.378 MPa, dihydrodibenzotiophene (DHDBT), tetrahydrodibenzothiophene (THDBT), hexahydrodibenzothiophene (HHDBT), hydrogen sulphide (H2S). Ni17S18 as a yield of 12.03 % THDBT, 17.83 % CHB, and 70.14 % BP.
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Acknowledgments
The authors acknowledge financial support from PROMEP/103.5/03/1101, DGAPA-UNAM (grant IN-108908) and Conacyt (grant 2010-151551). We are very grateful to E. Aparicio, F. Ruiz, E. Flores, I. Gradilla, M. Sainz, J. Peralta, C. Ornelas and P. Riley (Peace Corps/Mexico) for technical assistance.
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Miguel Ávalos-Borja—On leave at IPICyT, División de Materiales Avanzados, San Luis Potosí, S.L.P., México.
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Quintana-Melgoza, J.M., Alonso-Nuñez, G., Homero-Galván, D. et al. Comparative Activity of Ni–W and Co–Mo Sulfides Using Transition Metal Oxides as Precursors in HDS Reaction of DBT. Catal Lett 142, 1082–1088 (2012). https://doi.org/10.1007/s10562-012-0860-y
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DOI: https://doi.org/10.1007/s10562-012-0860-y