Experimental Study of an Extractive Coking Process to Produce Low-Sulfur Liquid Fuels from Bituminous Coal. Final Report, January 1975-July 1977

摘要

The delayed coking process is technically feasible. The following specific results of those detailed in the previous section contribute to this conclusion: coal conversions at near optimal conditions are greater than 50% of the M.A.F. coal; simulated process solvent is readily hydrotreated to a material with improved hydrogen-donor properties; the solvent properties can be modified by distillation; lower extraction temperatures are preferred to higher ones; extraction pressure is not an important variable as long as it is sufficient to maintain the solvent substantially as a liquid at extraction temperature; gas yields are moderate and potentially controllable by adjusting the solvent:coal ratio and heater skin temperatures; product liquid is a substantially - if not totally - distillate material of very low ash content; byproduct coke properties facilitate its removal from the coke drums in the conventional delayed coking fashion; and slurry heating of the coal-oil mixture works. On the basis of the preliminary plant design factors developed under this program, the projected economics of Extractive Coking are attractive: (1) when compared to state-of-the-art developing processes and (2) under certain scenarios as compared with the purchase of imported crude oil. (ERA citation 07:006636)