GASIFICATION TEST OF COAL LIQUEFACTION RESIDUE FROM PILOT PLANT

Abstract

This chapter discusses a study to examine the gasification test of coal liquefaction residue from pilot plant. Four gasification tests for each sample were carried out at varying O 2 /coal feed ratios. Examination of the residue from the de-ashing unit and the Yallourn brown coal led to a program of gasification tests with the brown coal alone and the residue mixture. Brown coal is an excellent feedstock for entrained-flow gasification if less than 1% of acidic material is added to improve slag fusibility. The studies with the mixture including residue show that gasification can be a means to dispose of the coal liquefaction by-product. The high sulfur content of the mixed feed will be converted to H 2 S. This H 2 S is passed after separation from raw gas to the Claus unit for elemental sulfur production. In some coal liquefaction processes, an extensive by-product recovery is inevitable. An effective method for the treatment and/or utilization of the residue from the coal liquefaction process is also elaborated.