Hydrodesulfurization of Venezuelan Residual Fuel Oils.

摘要

The hydrodesulfurization characteristics of a Venezuelan topped crude oil and a Venezuelan reduced crude oil were determined at temperatures from 740to 850F,pressures from 800to 1,600psig,and space velocities from 1.0to 2.0 V(o)/V(c)/hr. Kinetic calculations showed that under these conditions the desulfurization reaction was first order with respect to sulfur and had an average activation energy of 32.5kcal/mol. Catalyst life tests made at 750F,with pressures of 800, 1,200,and 1,600psig and space velocities of 1.0and 1.25 V(o)/V(c)/hr,showed that the decrease in the relative activity of the catalyst was a logarithmic function of time or volume of oil processed and the amount of vanadium deposited on the catalyst. Comparative tests made with residual fuels prepared from a Wilmington,Calif.,crude oil and a Wyoming asphaltic crude oil showed that catalyst life may be extended by processing fuel oil with a low metal content,but it may be shortened by the presence of large amounts of asphalt in the feed. (Author)