84.石炭の酸処理による凝集構造変化と解重合

概要

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Mild acid pretreatment was performed to modify the aggregate structure and pyrolysis behavior of coals. The pretreatment effectively removed ion-exchangeable cations from lower ranking coals, and enhanced the swelling by polar solvents such as pyridine, and increased the volatile yield in the flash pyrolysis. The pretreatment loosens the aggregate structure of coal through liberating the ion bridge, to form free oxygen functional groups, explaining those enhancement. Pyrolysis of model oxygen-containing compounds was also studied to clarify the roles of cations in the decomposition of oxygen functional groups at the early stage of pyrolysis. The depolymerization mechanism is discussed based on the above results and structural analyses of the pretreated coals.
一般社団法人日本エネルギー学会の論文
1998-11-19