MODELING FOR SUSPENSION OF COAL IN MULTIPHASE REACTOR SYSTEM - A STATISTICAL APPROACH

Experiments have been conducted in a 40 mm diameter and 1.5 m length g lass reactor treating different coals in the size range 53-76 mu m usi ng: anthracene oil as the liquid medium to prepare the slurry to study the suspension characteristics of coal in oil. The variables studied are coal to oil ratio, coal ash, slurry velocity, gas velocity and pre ssure drop. The effect of these variables on the minimum superficial v elocity of gas required to keep the coal particles in suspension have been studied qualitatively and models have been developed for predicti on of minimum superficial velocity and pressure drop. Utilizing graphi cal as well as statistical approach model parameters have also been op timized. (C) 1998 Elsevier Science Ltd, All rights reserved.