10 高温溶剤中での低品位炭の改質挙動の検討(改質・処理・クリーン化(1))

概要

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We have recently proposed a new upgrading method of low rank coals, which consists of treatment of the coals in 1-methylnaphalene at lower than 350℃ for a certain period and subsequent separation of extracts from the coals through filtration. This method was found to be effective in recovering a large amount of low-moleculer substances which were significantly upgraded in terms of elemental composition. In this study we examined the effects of temperature, time, and pressure on the upgrading behaviors of a brown coal. The treatment for a longer time resulted in larger extraction yields and more decomposition of oxygen functional groups, as was expected. When the holding time at 350℃ exceeded 1h, however, the extraction yield did not increase any more and the extract slightly became heavier. It was also found that pressure did not largely affect the upgrading behavior.
一般社団法人日本エネルギー学会の論文
2008-10-09