Relationship between Variation of Parameters and Behaviors of Coals during Heating
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- TAKANOHASHI Toshimasa
- National Institute for Resources and Environment
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- YOSHIDA Takahiro
- Institute for Chemical Reaction Science, Tohoku University
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- IINO Masashi
- Institute for Chemical Reaction Science, Tohoku University
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- KUMAGAI Haruo
- Center for Advanced Research of Energy Technology, Hokkaido University
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- KATO Kenji
- Process Technology Research Laboratories, Nippon Steel Corp.
Bibliographic Information
- Other Title
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- 石炭の加熱過程における各種パラメータの変化と軟化溶融挙動との関連
- セキタン ノ カネツ カテイ ニ オケル カクシュ パラメータ ノ ヘンカ ト ナンカ ヨウユウ キョドウ ト ノ カンレン
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Abstract
For high-caking Warkworth and low-caking K-Prima coals, Geiseler plastometry, differential scanning calorimetry (DSC), proton magnetic resonance thermal analysis (PMRTA) and dynamic viscoelasticity were measured at a heating rate of 3°C/min under nitrogen. The amount of solvent-soluble constituent of the coals heat-treated at 3°C/min was also measured by using a solvent extraction with carbon disulfide-N-methyl-2-pyrrolidinone mixed solvent at room temperature, which gives high extraction yields for the heat-treated coals in the softening range. Changes in various chemical and physical parameters from the measurements were compared with one another to investigate the mechanism of softening and fusibility of coals. We suggest that the softening is occurred by a physical relaxation of aggregates in coal macromolecular structure and the amount of the solvent-soluble constituents greatly increases, resulting in enhancing the softening and fusibility. The mobility parameter from PMRTA, the viscoelastic parameter and Geiseler fluidity gave the maximum at similar temperature, showing that fusibility is the result of increased mobility of whole coal. The dynamic viscoelastic measurement was found to be a useful and convenient means for the study on caking behaviors of coals, since it can estimate concurrently both the fluidity and the elasticity of coals.
Journal
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- Tetsu-to-Hagane
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Tetsu-to-Hagane 85 (5), 382-386, 1999
The Iron and Steel Institute of Japan
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Details 詳細情報について
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- CRID
- 1390282680160451840
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- NII Article ID
- 110001457073
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- NII Book ID
- AN00151251
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- ISSN
- 18832954
- 00211575
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- HANDLE
- 2115/79502
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- NDL BIB ID
- 4720502
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed