【正文】
f coal liquefaction is the production of liquid hydrocarbon distillate products from a coal’s mostly aromatic structure to be used as transportation fuels or chemicals. ? Finely crushed coal (85% minus mm) is prepared as a slurry with a processderived vehicle oil, preheated and pumped into a heated (400–500℃ ) pressure vessel (–) in the presence of hydrogen gas with or without a catalyst for some duration (30–150 minutes). ? Singlestage Process and Twostage Process. Singlestage Process ? IGOR (Germany) ? NEDOL (Japan) ? HCoal (USA) ? Exxon Donor Solvent (EDS) (USA) ? SCRI and II (USA) ? Imhausen highpressure (Germany) ? Conoco zinc chloride (USA) IGOR Process Process yields and product quality with Prosper Coal NED