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- W152309056 abstract "A joint cost shared contract to perform exploratory research and development on process variations in two-stage coal liquefaction process was awarded by the Department of Energy (DOE) and Electric Power Research Institute (EPRI) to Kerr-McGee Corporation in September 1983. Three two-stage process configurations, involving selective recycle of distillate and fractionated resids between the Thermal- and the Catalytic-stage, were evaluated using Wyoming subbituminous coal. In these particular process configurations the resid feed to the Catalytic-stage (hydrotreater) was progressively made heavier (higher preasphaltenes contents) to determine which configuration produced a high distillate yield with reduced fouling rate of the hydrotreater catalyst. In a zero resid product mode of operation, process configuration involving hydrotreating of Light Deashed Resid (LDAR) produced the highest distillate yield of 52.6 wt % (MAF coal feed basis) and the least fouling rate of the hydrotreater catalyst. The addition of iron oxide, and particularly the addition of iron oxide and hydrogen sulfide to the Thermal-stage showed a beneficial effect on the coal conversion and distillate yield obtained from a subbituminous coal. With bituminous coal such benefits appeared to be limited to the improvement of distillate yield. However, for both coal types the vacuum bottoms preasphaltenes content as well asmore » viscosity were decreased by addition of iron oxide together with hydrogen sulfide. 5 refs., 14 figs., 39 tabs.« less" @default.
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- W152309056 date "1985-11-01" @default.
- W152309056 modified "2023-09-26" @default.
- W152309056 title "Two-stage coal liquefaction studies. Volume 1. Selective residuum recycle. Final report" @default.
- W152309056 hasPublicationYear "1985" @default.
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