報告書番号

M10015

タイトル（和文）

バイオマスの高度共利用方法の開発 －粗酢液を用いた石炭燃焼・ガス化反応性の向上－

タイトル（英文）

Development of advanced co-utilization technology for biomass - Enhancement of coal reactivity for combustion and gasification by crude vinegar -

概要 （図表や脚注は「報告書全文」に掲載しております）

バイオマス由来の未利用資源である粗酢液を石炭と混合することで、石炭の反応性が向上する効果を見いだした。バイオマスの有効利用促進に向けた新たな高度共利用技術の開発が期待される。噴流床石炭ガス化炉や微粉炭燃焼ボイラへの適応を念頭に、高温ガス化条件や燃焼条件における粗酢液の効果を検討した。電気加熱式管状反応炉(DTF)を用いて各種酢液処理炭のガス化実験や燃焼実験を行い、石炭に含有するカルシウムやフラックスとして添加したカルシウムが粗酢液により触媒作用を示すようになることを明らかにした。さらに、燃焼性の向上はめざましく、灰中未燃分が大幅に低減されることが分かった。粗酢液処理は、燃焼や高温ガス化においても有用な技術であると言える。

概要 （英文）

It has found that crude vinegar formed in carbonization processes of biomass is effective in increasing the coal gasification reactivity. This effect should be helpful to advance co-utilization of biomass. In this study, the effects of crude vinegar on high-temperature coal gasification reactivity and coal combustion reactivity were discussed to adapt this technology for entrained-flow gasifiers and pulverized coal boilers. Coals samples treated with crude vinegar were gasified with carbon dioxide or air, and also combusted at high temperature in a drop tube furnace. As a result, the reactivity of coal treated with crude vinegar was improved very much, because inherent calcium in coal and additive calcium to coal were dissolved into crude vinegar, were loaded onto the surface of pulverized coal particles, and then became to have high catalytic activity. Carbon conversions of coal in carbon dioxide or air were improved very much at the same residence time by the addition of crude vinegar to coal. It was found that calcium has also high catalytic activity for coal combustion. The combustion reactivity was improved much more than the gasification reactivity by crude vinegar.

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