No.45 循環流動層を用いた石炭のガス化特性に及ぼすチャー再循環の影響(研究発表)

概要

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Indonesian sub-bituminous coal was gasified with steam in a circulating fluidized bed (CFB). The CFB consisted of a drop tube pyrolyzer, and bubbling fluidized bed gasifier and combustor. In the CFB system, pyrolysis was terminated in the pyrolyzer and then the char was gasified with steam in the gasifier. The un-gasified char was circulated to the combustor to be combusted. In the present study, the combustion of the char in the combustor was intentionally stopped to examine effect of re-circulation of the car on the gasification characteristics. The re-circulated char cracked a portion of the tar formed by pyrolysis in the pyrolyzer. Then the re-circulated char was gasified again in the gasifier. The re-circulation of the char would be effective to promote the gasification in the CFB system.
2011-10-27