Kinetics of lignite pyrolysis in fixed bed and entrained flow reactors. Technical report No. 17

Abstract

A laminar flow isothermal furnace has been constructed and used to study lignite pyrolysis in nitrogen at temperatures between 700 and l000°C. Particles of a Texas lignite (Darco Seam) between 41 and 201-microns in mean diameter, are found to flow down•the furnace tube with velocities approximated by the summation of the gas plugflow velocity and particle free-fall velocities. Some particle shrinkage and density changes occur during pyrolysis. Pyrolysis rate