GASIFICATION OF COAL WITH K-EXCHANGED BROWN COAL PREPARED FROM POTASSIUM CHLORIDE

Abstract

This chapter discusses a study in which a method utilizing KC1 as the raw material for the catalytic gasification of higher rank coals was used. The K-exchanged brown coal prepared from KCl solution using the ion-exchange technique was physically mixed with a higher rank coal, and the mixture was gasified in a thermobalance or a fluidized bed reactor. The catalytic effect of the K-exchanged brown coal on the gasification of higher rank coal was investigated. Ten coals ranging from anthracite to brown coal were used in this study. Two low rank coals, Yallourn coal and Bienfait coal were used for the catalyst loading using the ion-exchange method. The reactivity enhancement of the higher rank coal by the physical mixing of the K-exchanged coal is observed for all coals examined. It is found that the effectiveness of the co-processing is slightly dependence on the coal type.