Abstract
Thiophene was desulfurized and exchanged with deuterium over laboratory-synthesized Co γ- Al 2O 3 , Mo γ- Al 2O 3 , and CoMo γ- Al 2O 3 catalysts and over commercial CoMo γ- Al 2O 3 catalysts. Magnetic properties of the Co γ- Al 2O 3 catalysts were measured, desulfurization activities of all catalysts were measured, and the deuterium exchange patterns of the desorbed thiophenes were measured. For Co γ- Al 2O 3 , no clear correlation was found between magnetic properties and desulfurization activity, but a crude correlation was found between percent d 2 and desulfurization. For molybdenum-containing catalysts, desulfurization activity was high and accompanied by random exchange. Also d 2 was high. For the commercial catalysts high d av generally correlated with high desulfurization activity. The results can be rationalized on the basis of a modified Komarewsky mechanism.
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