Abstract
This paper presents data on the effect of pressure, in a coking straight-run and secondary resids from West Siberian crudes, on the yield and quality of the coke that is obtained. Increasing the pressure has a very marked effect on the coke yield, increasing the gas yield, and reducing the relative amount of coker gas oil. Pressure also changes the hydrocarbon composition of the distillates, though it has no effect on the content of sulfur in the coke. In general, by increasing the pressure in delayed coking of various types of feeds, the coke yield can be increased.
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