ConclusionsThe following conclusions can be drawn from the preceding discussion.1. The physical properties of the catalyst (i.e., specific surface area, specific pore volume, average pore diameter,
Hydrodesulfurization of atmospheric residual oil of Khafji crude with carbon monoxidewater mixtures was examined on alumina-supported cobalt-molybdenum catalysts using a batchactions took place concurrently. However, both the excess water and the carbon dioxide produced by the water-gas shift reaction inhibited the desulfurization. A series of cobalt-molybdenum catalysts with 10wt% molybdena and with varying ratios of Co/Mo was examined for desulfurization activity. With the Co/Mo ratio of =0.5 (atom/atom), the cobalt-molybdenum system reached its maximum activity under the conditions used. It seems reasonable to suppose that the catalyst, available for hydrodesulfurization using carbon monoxide plus water, is responsible not only for promoting the water-gas shift reaction but also for promoting subsequent hydrodesulfurization.
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