Optimization Studies of Various Coal-Conversion Systems. Quarterly Report Nos. 1 and 2, May 1, 1981-July 13, 1981 and August 1, 1981-October 31, 1981

摘要

Direct conversion of coal into coal liquids is usually carried out in a reactor composed of gas, solid and liquid. Two types of coal liquefier reactors are examined for the optimization of coal conversion systems: three-phase fluidized bed and bubble column of slurry reactors. These two reactors have some similarities, i.e., both are three-phase reactors, both deal with mass transfer of gas species from gas phase into liquid and solid phases and both involve dissolution of solid phase. The main difference between them is that solid particles have much longer residence time in three-phase fluidized beds than in bubble columns. The first part of this report is the literature survey of three-phase fluidization to clarify the hydrodynamic aspect of ebullated bed reactor design. The second part is the literature survey of the hydrodynamics of solid-liquid-gas system slurry reactors.