Abstract
The importance of hydropyrolysis as a coal-to-liquid route is considered. Yields of BTX of up to 15% w/w have been obtained from bituminous coal and lignite by using very rapid heating (∼ 1000 Ksec −1) to 1000–1100 K in hydrogen pressures in the range 100–200 bar at optimum vapour residence times. The yields obtained by various workers and the mechanisms of the formation of BTX from coal by hydropyrolysis are discussed.
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