Abstract
The catalytic activity for the hydrocracking of thiophene of molybdenum-cobalt catalysts mounted on SiO 2Al 2O 3 of different compositions and the surface property of the carriers were studied. A correlation was found between the activity and the amount of MoO 3 mounted on the carriers. The amount of MoO 3 increased with the increase of the amount of anionic OH group on the carriers, which can be exchanged with fluorine ion. For a series of molybdenum catalysts mounted on various aluminas, magnesia-alumina, active carbon, etc., it was also found that the amount of MoO 3 correlated well with the amount of OH group. A MgOAl 2O 3 carrier which has the largest amount of OH group supported the largest amount of MoO 3. The role of anionic OH group for the interaction between MoO 3 and carriers is discussed.
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