48. Co-pyrolysis of hydrothermally upgraded brown coal and waste plastics
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- ASHIDA Ryuichi
- Department of Chemical Engineering, Kyoto University
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- POCES Susan A.
- Department of Chemical Engineering, Kyoto University
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- PATTARAPANUSAK Monthicha
- Department of Chemical Engineering, Kyoto University
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- MORIMOTO Masato
- Department of Chemical Engineering, Kyoto University
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- NAKAGAWA Hiroyuki
- Department of Chemical Engineering, Kyoto University
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- MIURA Kouichi
- Department of Chemical Engineering, Kyoto University
Bibliographic Information
- Other Title
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- 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
Abstract
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.
Journal
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- Proceedings of Conference on Coal Science
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Proceedings of Conference on Coal Science 43 (0), 97-98, 2006
The Japan Institute of Energy
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Details
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- CRID
- 1390001205769554432
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- NII Article ID
- 110006857905
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- ISSN
- 24238309
- 24238295
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- Text Lang
- ja
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed