石炭科学会議発表論文集
Online ISSN : 2423-8309
Print ISSN : 2423-8295
ISSN-L : 2423-8295
第52回石炭科学会議
セッションID: No.40
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No.40 石炭の60~80℃での空気による酸化速度の測定(熱分解・コークス(3))
三浦 孝一藤墳 大裕Janewit WannapeeraTrairat Muangthong-on大垣 英明
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会議録・要旨集 フリー

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Low rank coals are susceptible to spontaneous combustion, but they must be heated over a critical temperature of around 70 ℃ before spontaneous combustion starts. This work focused on the adsorption of water vapor as a possible mechanism of the temperature increase up to the critical temperature. When the coals pre-dried and cooled to 38 ℃ were exposed to a saturated air at 38℃, the coal temperatures increased up to over 60℃ in a minute or so. This work showed that the rapid adsorption of water vapor will be a cause of temperature increase leading to the spontaneous combustion of low rank coals.

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