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Fractionation of brown coal by sequential high temperature solvent extraction

机译：通过顺序高温溶剂萃取分离褐煤

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摘要

Separation of brown coal into fractions having rather uniform structure is believed to be one of the promising pretreatment methods for effective utilization of brown coal. The authors have recently presented a new coal fractionation method that can separate a bituminous coal into several fractions having different molecular weight compounds without decomposing the coal. The method extracts coal using a flowing stream of non-polar solvent such as tetralin or 1-methylnaphthalene by increasing the extraction temperature stepwise up to 350 ℃. In this study the fractionation method was applied to fractionate a brown coal. Water was used as an extracting solvent in addition to tetralin and 1-methylnaphthalene by intending to utilize inherent water of brown coal as the extraction solvent. An Australian brown coal was successfully fractionated into six fractions by any solvents, but the properties of the fractions were significantly different depending on the extraction solvent. This is because tetralin, 1-methylnaphthalene, and water interacted significantly with the brown coal in different ways even at less than 350 ℃. The difference in chemical structure and thermal properties of the fractions were examined in detail through ultimate analysis, ~(13)C NMR, molecular weight distribution, and thermogravimetric and thermomechani-cal analyses.
机译：褐煤分离成结构相当均匀的馏分被认为是有效利用褐煤的有前途的预处理方法之一。作者最近提出了一种新的煤分馏方法，该方法可以将烟煤分离成具有不同分子量化合物的几个馏分而不会分解煤。该方法利用流动的非极性溶剂（例如四氢萘或1-甲基萘）流将煤提取，将提取温度逐步提高到350℃。在本研究中，采用分馏方法对褐煤进行分馏。通过使用褐煤的固有水作为提取溶剂，除四氢萘和1-甲基萘以外，还使用水作为提取溶剂。澳大利亚褐煤可通过任何溶剂成功地分为六个馏分，但馏分的性质因萃取溶剂的不同而有显着差异。这是因为即使在低于350℃的温度下，四氢化萘，1-甲基萘和水与褐煤的相互作用也不同。通过最终分析，〜（13）C NMR，分子量分布以及热重和热力学分析，详细检查了馏分的化学结构和热性能差异。

著录项

  • 来源
    《Fuel》 |2009年第8期|1485-1490|共6页
  • 作者

    Ryuichi Ashida; Masato Morimoto; Yoshihiro Makino; Satoshi Umemoto; Hiroyuki Nakagawa; Kouichi Miura; Koji Saito; Kenji Kato;

  • 作者单位

    Department of Chemical Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan;

    Department of Chemical Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan;

    Department of Chemical Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan;

    Department of Chemical Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan;

    Environment Preservation Center, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan;

    Department of Chemical Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan;

    Environment and Process Technology Center, Nippon Steel Corporation, 20-1 Shintomi, Futtsu, Chiba 293-8511, Japan;

    Environment and Process Technology Center, Nippon Steel Corporation, 20-1 Shintomi, Futtsu, Chiba 293-8511, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    brown coal; coal fractionation; solvent extraction;

    机译：褐煤;煤分馏;溶剂萃取;

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