A New Clean Coal Technology by Mild Modification at Low Temperature

低温温和改性洁净煤新技术

• 批准号: 10450304
• 负责人: MIURA Kouichi
• 金额: $ 4.48万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450304/
• 关键词: 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

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.

为了开发一种新的煤的预处理方法，生产一种洁净的、具有活性的煤，我们进行了以下几个方面的研究：（1）煤的液相氧化研究。（2）通过预处理去除碱金属和硫的性能。（3）预处理煤的交联反应分析（4）煤与预处理煤的一种新的共液化方法，首先发现通过H ↓ [2] D22 ↓ [2] O ↓ [2] D22 ↓ [2] O ↓ [2]的液相氧化，煤中的一部分芳环断裂成脂肪族结构，并引入大量的氢。同时，大量的小分子脂肪酸被回收，表明煤中的氧被一种有价值的化学物质去除。将预处理后的煤用于热解和燃烧，考察了碱金属蒸气和硫的排放特征。它们的排放量显着减少通过H氧化D22氧化D2O氧化D22氧化D22氧化D2。接下来，我们检查了预处理的煤的反应性。我们分析了在加热过程中的预处理煤的交联反应的动力学。通过预处理引入的COOH基团在400℃时发生分解交联，而在苛刻条件下预处理的煤由于COOH以小分子脂肪酸的形式被脱除，没有发生交联。由于预处理后的煤在200℃时易被溶剂溶解，因此我们利用这一特性进行了煤与预处理煤的共液化。通过添加预处理煤代替部分溶剂，提高了液化产率，从而阐明了该方法作为生产清洁和活性煤的预处理方法是有效的。

项目成果

K. Mae, K. Miura: "Observation of Retrogressive Reactions during Liquefaction Conditions Utilizing the Oxidized Coal Completely Dissolved in Solvent at Room Temperature"Energy & Fuels.. 12(5). 975 (1998)

K. Mae、K. Miura：“利用室温下完全溶解在溶剂中的氧化煤在液化条件下观察回归反应”能量

K. Miura, K. Mae: "A New Oxidative Degradation Method for Producing Valuable Chemicals from Lignite and Biomass"Proc. 6th Japan-China Symposium on Coal and C1 Chem., (Zao).. 370-373 (1998)

K. Miura、K. Mae：“一种从褐煤和生物质生产有价值化学品的新氧化降解方法”Proc。

K.Mae,K.Miura: ""Production of Valuable Chemicals in High Yield from Brown Coals by Combining Liquid Phase Oxidation and Proper Upgrading Method""Prospects for Coal Science in the 21^<st> Century, eds. B.Q. Li, Z.Y. Liu, Shanxi Sci. & Technol. Press. Vol.

K.Mae，K.Miura：“结合液相氧化和适当的升级方法，从褐煤中高产地生产有价值的化学品”，《21世纪煤炭科学展望》，编辑。

K. Mae, K. Miura: "A New Two-Step Oxidative Degradation Method for Producing Valuable Chemicals from Low Rank Coals"Proc. 15th Annual International Pittsburgh Coal Conference. Paper No. 16-4. (1998)

K. Mae，K. Miura：“一种从低阶煤生产有价值化学品的新型两步氧化降解方法”Proc。

K,Mae 他: "Examination of Relationship between Coal Structure and Pyrolysis Yields Using Oxidized Brown Coals Having Different Macromolecular Networks" Fuel. (印刷中).

K, Mae 等人：“使用具有不同大分子网络的氧化褐煤检查煤结构与热解产率之间的关系”（正在出版）。