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Upgrading and dewatering of raw tropical peat by hydrothermal treatment

机译：通过水热处理对热带泥炭进行升级和脱水

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摘要

In this study, hydrothermal upgrading and dewatering of raw tropical peat derived from Pontianak, West Kalimantan-Indonesia was evaluated at temperatures ranging from 150 to 380 ℃, a maximum final pressure of 25.1 MPa and a residence time of 30 min. The moisture content of the raw peat was approximately 90 wt.%. Raw peat was hydrothermally upgraded without the addition of water in the laboratory scale. The yield of the solid products was between 53.0 and 99.7 wt.% and the effective calorific value of hydrothermally dewatered peat was between 17,290 and 29,209 kJ/kg following hydrothermal upgrading. In addition, the oxygen content in the solid product was varied from 38.4 to 15.6 wt.% after upgrading, while the carbon content from 55.2 to 77.8 wt.%. The hydrothermally upgraded peat fuel product also had an equilibrium moisture content of 2.3 wt.% and a maximum equilibrium moisture content of 17.6 wt.%. Upgraded peat is characteristically resistant to moisture adsorption at high humidity, which makes it promising for fuel based combustion. The change in the carbon-functional groups and their properties, as determined by FTIR and ~(13)C NMR, are discussed in terms of the hydrothermal upgrading and dewatering process.
机译：在这项研究中，在150至380℃，最大最终压力25.1 MPa和停留时间30分钟的条件下，对源自西加里曼丹-印度尼西亚的坤甸的原始热带泥炭进行了热液升级和脱水。生泥炭的水分含量约为90重量％。将未加工的泥炭进行水热升级，而无需添加实验室规模的水。固体产物的产率在53.0至99.7wt。％之间，并且在水热提质后，水热脱水的泥炭的有效发热量在17,290至29,209kJ / kg之间。此外，提纯后固体产物中的氧含量在38.4至15.6重量％之间变化，而碳含量在55.2至77.8重量％之间。该水热改良的泥炭燃料产品还具有2.3重量％的平衡水分含量和17.6重量％的最大平衡水分含量。升级后的泥炭在高湿度下具有耐湿气吸附的特性，这使其有望用于基于燃料的燃烧。 FTIR和〜（13）C NMR确定的碳官能团及其性质的变化，是根据水热升级和脱水过程进行讨论的。

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  • 来源
    《Fuel》 |2010年第3期|635-641|共7页
  • 作者

    Anggoro Tri Mursito; Tsuyoshi Hirajima; Keiko Sasaki;

  • 作者单位

    Department of Earth Resources Engineering, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan;

    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan;

    Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, 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

    hydrothermal treatment; tropical peat; upgrading; dewatering; peat fuel;

    机译：水热处理热带泥炭;升级脱水泥炭燃料;

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