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Production of High-Strength Coke from Low-Quality Coals Chemically Modified with Thermoplastic Components
Title: | Production of High-Strength Coke from Low-Quality Coals Chemically Modified with Thermoplastic Components |
Authors: | Tsubouchi, Naoto Browse this author →KAKEN DB | Naganuma, Ryo Browse this author | Mochizuki, Yuuki Browse this author | Hayashizaki, Hideyuki Browse this author | Shishido, Takahiro Browse this author | Sharma, Atul Browse this author |
Keywords: | coal | coke | chemically modified | thermoplastic components | coke strength |
Issue Date: | 15-Aug-2019 |
Publisher: | 一般社団法人 日本鉄鋼協会 (The Iron and Steel Institute of Japan) |
Journal Title: | ISIJ international |
Volume: | 59 |
Issue: | 8 |
Start Page: | 1396 |
End Page: | 1403 |
Publisher DOI: | 10.2355/isijinternational.ISIJINT-2018-788 |
Abstract: | In order to produce high-strength coke from low-quality coals, noncovalent bonds between O-functional groups in coal were cleaved by pyridine containing HPC pyridine soluble and HPC-derived thermoplastic components were introduced into the pores formed by swelling; thus, the synergistic effect during carbonization of the suppression of cross-linking reactions and the fluidity amplification due to close placement of coal and thermoplastic components was investigated. When HPC was extracted with pyridine, a decrease in O-functional groups was observed in the pyridine-soluble and pyridine-insoluble components. When HPC was extracted with MeOH, on the other hand, O-functional groups in HPC selectively moved into the soluble components. When non- or slightly-caking coal was chemically-modified with the prepared HPC pyridine-soluble components by utilizing the solvent-swelling effect of pyridine, the fluidity improved compared with the coals physically mixed with the soluble components or HPC. On the other hand, the fluidity of the chemically-modified sample with the MeOH-soluble components hardly changed from that of the original sample, and no effect of the modification with the thermoplastic component was observed. Furthermore, it was clarified that higher-strength coke can be produced from the chemically-modified sample with the HPC pyridine-soluble components than from the original coal or the physically mixed coal with the soluble components. The contraction behavior during carbonization of the chemically-modified sample with the soluble components and that of the original coal was investigated; as a result, a large difference was not observed between these two. Thus, it was found that high-strength coke can be produced from low-quality coals by the present method. |
Type: | article |
URI: | http://hdl.handle.net/2115/75912 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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