Two kinds of low rank coals were rapidly pyrolyzed at 600℃ using a two-stage fluidized bed reactor. Almost all the tar formed during pyrolysis was captured by the porous alumina particles in the upper bed of the reactor, and then cracked to form coke. The resultant coke on the alumina particles and char were independently gasified with steam in a bubbling fluidized bed. Gasification rate as well as gas composition by the steam gasification of coke were independent of coal type, while those of char depended upon the coal type.
