主催: 日本エネルギー学会 石炭科学部会, 日本エネルギー学会 コークス工学研究部会
共催: 日本学術振興会 石炭・炭素資源利用技術第148委員会, 化学工学会 エネルギー部会, 日本エネルギー学会 重質油部会, 日本エネルギー学会 エネルギー学部会
会議名: 第52回石炭科学会議
回次: 52
開催地: 伊勢市観光文化会館（三重県伊勢市）
開催日: 2015/10/28 - 2015/10/29
The objective of this study is to develop an advanced desulfurization process for clean fuel production from coal with the use of ionic liquid that can be carried out under mild condition. Ionic liquids were prepared by adding dialkylsulfates to alkylimidazoles in toluene. Coal soluble was prepared by applying Miura's process. A mixture of coal sample and 1-methylnaphthalene was heated at 350℃ for 1 h in an autoclave. Sulfur K-edge X-ray absorption near edge structure spectroscopy was applied to specifying the forms of sulfur in raw coal and its soluble. Sulfur in the soluble was mainly composed of thiophenic sulfur according to XANES analysis. Organic sulfur in the coal soluble was successfully extracted by using one of ionic liquids, dimethyl imidazole methyl sulfate (MMIMMeSO_4) which showed phase change from solid to liquid above 70℃. With repeated extraction by MMIMMeSO_4, the sulfur content in the coal soluble could be decreased considerably.
