The potential of two different mesoporous materials, MCM-41- and MCM-48-supported sulfided CoMo
bimetallic catalysts, for hydrodesulfurization (HDS) of thiophene at specific conditions was explored to
investigate the effect of channel connectivity on HDS activity. The hydrothermal stability of MCM-41 and
MCM-48 was improved remarkably by a post-salt treatment technique. Aluminum incorporation to mesoporous
material frameworks improved acidity and hydrothermal stability. Mesoporous-material-supported CoMo
catalysts with different Co/Mo atomic ratios were prepared by coimpregnation of Co(NO3)2·6H2O and (NH4)6Mo7O24·4H2O. The characterization of the catalysts was carried out by X-ray diffraction (XRD), N2 adsorption/desorption, NH3-temperature-programmed desorption (NH3-TPD), transmission electron microscopy (TEM),
CO chemisorption, elemental analysis (EA), and 13C NMR. MCM-41-supported catalysts showed a small
decrease in activity compared to MCM-48-supported catalysts. The optimal Co/Mo atomic ratio for MCM-41- and MCM-48-supported series of catalysts was 3:7. The aluminosilicate-supported CoMo catalysts showed
higher activities than their siliceous counterparts.
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