48.水熱条件で改質された褐炭と廃プラスチックの共熱分解

DOI

書誌事項

タイトル別名
  • 48. Co-pyrolysis of hydrothermally upgraded brown coal and waste plastics

抄録

The authors have recently presented a new hydrothermal extraction method that not only removes water from brown coal but also separates the coal into upgraded coal and extract of low molecular mass compounds. The upgraded coal obtained contained much less oxygen than the raw coal and its elemental composition was close to higher rank coals. In this study co-pyrolysis of the upgraded coals and waxes formed from waste plastics was investigated as one of the methods of their effective utilization. Waxes were prepared through pyrolysis of high density polyethylene, polypropylene, and polyethylene terephtalate. Upgraded coals were then impregnated with the waxes by treatment in an autoclave at 200℃ under pressure. The mixtures of coal and wax were rapidly heated up to 1040℃ at about 3000℃/s using a Curie point pyrolyzer in an inert atmosphere. It was found that the char yield was greatly enhanced by a factor of 1.1 to 1.3 compared to the char yield obtained when the upgraded coals and waxes were pyrolyzed independently. Even at a slower heating rate (0.17℃/s) the char yields increased by a factor of 1.2 for all waxes. Since no such effect was found when using raw brown coal instead of the upgraded coal, it was suggested that the modification of the structure of brown coal by the hydrothermal extraction could enhance interactions between the coal and the wax when co-pyrolyzed.

収録刊行物

詳細情報

  • CRID
    1390001205769554432
  • NII論文ID
    110006857905
  • DOI
    10.20550/jiesekitanronbun.43.0_97
  • ISSN
    24238309
    24238295
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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