Abstract
The potential of two different mesoporous carbon materials, CMK-1 and CMK-3 supported sulfided Mo catalysts for hydrodesulfurization of thiophene at specific conditions was explored to investigate the effect of different pore sizes, surface oxygen functional groups, metal dispersion, and presulfidation temperature. The Mo catalysts (1∼14.8 wt % of Mo) supported on mesoporous carbons were prepared with (NH4)6Mo7O24·4H2O. For comparison, commercial activated carbon (Darco G-60) and alumina (γ-Al2O3) were used as a support for the Mo supported catalysts. Characterization of the supports and the catalysts was carried out by XRD, BET, EDS, FT-IR, acid-base titration, TEM and CO chemisorption. Sulfidation of carbon supported catalysts was favored at 573 K, whereas 673 K promoted the sulfidation of alumina supported catalysts. 10 wt % Mo supported catalysts showed the highest thiophene hydrodesulfurization activity in all supports. CMK-3 supported Mo catalysts were superior to all other catalysts because of the larger pore size and higher acidic functional groups.
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