【正文】
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 NEDOL Process HCoal EDS Process Twostage Process ? Catalytic TwoStage Liquefaction (CTSL) (USA) ? Liquid Solvent Extraction (LSE) (UK) ? Brown Coal Liquefaction (BCL) (Japan) CTSL Process LSE Process BCL P