| Project/Area Number |
10450304
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
触媒・化学プロセス
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
MIURA Kouichi Graduate School of Engineering, Kyoto University Professor, 工学研究科, 教授 (40111942)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAGAWA Hiroyuki Graduate School of Engineering, Kyoto University Instructor, 工学研究科, 助手 (40263115)
MAE Kazuhiro Graduate School of Engineering, Kyoto University Assoc. Professor, 工学研究科, 助教授 (70192325)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1999: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1998: ¥4,400,000 (Direct Cost: ¥4,400,000)
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| Keywords | Modification of coal / Liquid phase oxidation / Hydrogen bonding / Cross-linking reaction / Clean coal / 液相酸化 / 水素結合分布 / 架橋形成反応速度論 / 石炭のクリーン化 / 石炭 / 事前脱流 / 石炭の熱分解 |
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| Research Abstract |
In order to develop a new pretreatment, method for producing a clean and reactive coal, we performed the following items :
(1)Development of liquid phase oxidation of coal.
(2)Performance of the removal of alkali metal and sulfur through the pretreatment.
(3)Analysis of cross-linking reaction of pretreated coal
(4)A new co-liquefaction of coal and pretreated coal.
First, it was found that a part of aromatic rings were ruptured into aliphatic structures and a large amount of hydrogen was introduced in the coal through the liquid phase oxidation with HィイD22ィエD2OィイD22ィエD2. Simultaneously, a large amount of small molecule fatty acids were recovered, indicating that the oxygen removed from coal by a from of valuable chemicals. Thus pretreated coal was served to the pyrolysis and combustion, then the emission profiles of alkali metal vapor and sulfur was examined. Their amounts emitted dramatically decreased through the HィイD22ィエD2OィイD22ィエD2 oxidation.
Next, we examined the reactivity of the pretreated coal. We analyzed the kinetics of the cross-linking reaction during the heating of pretreated coal. The COOH groups introduced through the pretreatment was decomposed to cross-link by 400℃, but the pretreated coal under severe condition was not cross-linked because the COOH was removed by a form of a small molecule fatty acids. Since it was also found that the pretreated coal was easily dissolved by solvent at 200℃, we present a co-liquefaction of coal and pretreated coal by utilizing this property. The liquefaction yield increased by adding the pretreated coal in place of a part of solvent.
Thus it is clarified that the proposed method is effective as a pretreatment method for producing a clean and reactive coal.
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