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Title: 石炭の加熱過程における塩素の行方
Other Titles: Fate of the Chlorine in Coal in the Heating Process
Authors: 坪内, 直人1 Browse this author →KAKEN DB
望月, 友貴2 Browse this author →KAKEN DB
王, 延輝3 Browse this author
大塚, 康夫4 Browse this author
Authors(alt): Tsubouchi, Naoto1
Mochizuki, Yuuki2
Wang, Yanhui3
Ohtsuka, Yasuo4
Keywords: coal
chlorine distribution
HCL formation
chlorine enrichment
Issue Date: Aug-2017
Publisher: 日本鉄鋼協会
Journal Title: 鉄と鋼
Journal Title(alt): Tetsu-to-Hagane
Volume: 103
Issue: 8
Start Page: 443
End Page: 450
Publisher DOI: 10.2355/tetsutohagane.TETSU-2016-110
Abstract: Pyrolysis of 29 coals with carbon contents of 71-92 mass% on a dry, ash-free basis (daf) has been performed mainly in a temperature-programmed mode at 10ºC/min up to 800ºC with a flow-type fixed bed quartz reactor, and some factors controlling HCl formation have been examined. The rate profiles of HCl formation exhibit at least three distinct peaks at around 260-360, 470-510 and 580-630ºC, and the lowest temperature peak is present for 8 coals alone, whereas the middle and highest temperature peaks are common with almost all of the coals. The HCl profile is also affected by the size of coal particles and the height of coal particles in the fixed bed. Yields of HCl and char-Cl at 800ºC for 28 coals except an American bituminous coal are 44-95 and 4-54%, respectively, and tar-Cl is as low as ≤ 7% in all cases. The chlorine distribution is almost independent of the heating rate in the range of 2.5-400ºC/min and has no distinct relationship with carbon or chlorine content in coal, but HCl tends to increase with increasing amount of (Na + 2Ca) in coal with a corresponding decrease in char-Cl. When an Indonesian sub-bituminous coal is injected into an O2-blown entrained bed gasifier under pressure, there is an almost 1:1 relationship between carbon and nitrogen conversions, whereas the sulfur and chlorine are enriched in the remaining char, and the degree of the enrichment is higher with chlorine. The method of evaluating coal-Cl forms quantitatively using model chlorine compounds is proposed.
Rights: 著作権は日本鉄鋼協会にある
Type: article
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)

Submitter: 坪内 直人

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