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首页> 外文期刊>Energy & fuels >Examination of Interactions of Solvent-Treated Coal with Oxygen and Water Vapor at Over 100 degrees C Using TG-DSC for Examining Propensity to Spontaneous Heating of the Solvent-Treated Coal
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Examination of Interactions of Solvent-Treated Coal with Oxygen and Water Vapor at Over 100 degrees C Using TG-DSC for Examining Propensity to Spontaneous Heating of the Solvent-Treated Coal

机译：使用TG-DSC检查溶剂处理的煤与氧气和水蒸气在100摄氏度以上的相互作用，以检查溶剂处理的煤自发加热的可能性

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We have recently presented an extraction method, which we call degradative solvent extraction, for producing high quality extracts having similar physical and chemical properties from several types of low rank coals and biomasses. The degradative solvent extraction is an effective method to remove oxygen from low grade carbonaceous resources by dehydration and decarboxylation reactions, which minimize the loss of heating value of starting material. Three solid fractions, Residue, Deposit, and Soluble, were obtained from the extraction method when the product was fractionated. Soluble and Deposit are expected to be precursors for producing value-added products. Residue is expected to be utilized as a high quality solid fuel because of its high heating value comparable to subbituminous coal. When the extraction product was not fractionated, the product is the mixture of the three fractions just upgraded. We called the upgraded product "solvent-treated coal" (STC) when it was prepared from coal. STC is also expected to be a high quality solid fuel. To evaluate the potential of Residue and STC as high quality solid fuels, estimation of their propensity to spontaneous heating is essential in addition to their heating values and rates of combustion and/or gasification. In a previous work the authors have proposed that the weight change and the heat generation rate measured at 107 degrees C in both dry air and wet air can be an index to estimate the propensity to spontaneous heating. This work applied the method to estimate propensity to spontaneous heating of Residue and STC prepared from two low-rank coals. The propensity to spontaneous heating of the parent coals and chars prepared in an inert atmosphere at 350 degrees C is also examined for comparison purposes. It was found that the degree of propensity to spontaneous heating of Residue and STC is much less than that of the corresponding parent coal and chars.
机译：我们最近提出了一种提取方法，称为降解溶剂提取法，用于从几种类型的低等级煤和生物质中生产具有相似物理和化学性质的高质量提取物。降解性溶剂萃取是一种有效的方法，可通过脱水和脱羧反应从低品位含碳资源中去除氧气，从而最大程度地减少原料的热值损失。当分馏产物时，从萃取方法中获得了三个固体馏分（残留，沉淀和可溶）。可溶性和沉积物有望成为生产增值产品的前身。残渣因其热值可与次烟煤媲美而有望用作高质量的固体燃料。如果不对萃取产物进行分馏，则该产物为刚刚提纯的三个馏分的混合物。用煤制得的升级产品称为“溶剂处理煤”（STC）。 STC也有望成为一种高质量的固体燃料。为了评估渣油和STC作为高品质固体燃料的潜力，除了其发热量，燃烧和/或气化速率之外，估算其自发加热的倾向至关重要。在先前的工作中，作者提出在干燥空气和湿空气中在107摄氏度下测得的重量变化和生热速率可以作为评估自发加热倾向的指标。这项工作应用了该方法来估计由两种低阶煤制备的残渣和STC自发加热的倾向。为了比较的目的，还检查了在惰性气氛中在350℃下制备的母煤和焦炭自发加热的倾向。发现残渣和STC的自热倾向程度远小于相应母体煤和焦炭的倾向程度。

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  • 来源
    《Energy & fuels》 |2017年第11期|11723-11730|共8页
  • 作者

    Muangthong-on Trairat; Wannapeera Janewit; Ohgaki Hideaki; Miura Kouichi;

  • 作者单位

    Kyoto Univ, Inst Adv Energy, Uji, Kyoto 6110011, Japan;

    Kyoto Univ, Inst Adv Energy, Uji, Kyoto 6110011, Japan|King Mongkuts Univ Technol Thonburi, Ctr Energy Technol & Environm, Joint Grad Sch Energy & Environm, Bangkok 10140, Thailand;

    Kyoto Univ, Inst Adv Energy, Uji, Kyoto 6110011, Japan;

    Kyoto Univ, Inst Adv Energy, Uji, Kyoto 6110011, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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