21.高効率石炭液化触媒の開発 : イオン交換法による石炭担持鉄触媒の調製と液化活性

抄録

A cation exchange method was used to prepare iron-loaded Yallourn coal. Ca, Mg and Na in coal were removed completely by cation exchange with iron (II) sulfate aq. solution at pH 3.5. The iron-loaded coal by cation exchange method was shown slow formation of active phase as pyrrhotite (Fe_<1-x>S) by decomposition of iron carboxylate followed by sulfidation. Consequently, the iron-loaded coal gave a lower coal conversion. Another iron-loaded coal was prepared by adding ammonia water for residue of iron cation in aq. solution after cation exchange treatment. The iron-loaded coal by this method found to give better activity at a lower amount of cation exchanged iron and a higher amount of iron hydroxide on the iron-loaded coal. It was considerd that iron hydroxide on coal easily formed pyrrhotite by sulfidation before thermal decomposition of coal started.