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Catalytic gasification of coal is an old technology with patents dating back to at least 1884 [1]. To gasify charcoal, lignite, or subbituminous coals, these materials were mixed with the oxides, hydroxides, or carbonates of alkali metals or alkaline-earth metals, Considerably higher gasification rates or lower gasification temperatures were realized by these additives.
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Wen-Yang Wen (1980) studied this question.
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