7.熱分解チャーの固定床CO_2ガス化過程における塩素の行方

概要

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The fate of the chlorine present in coal and char during pyrolysis and gasification has been studied with a fixed bed quartz reactor. In the temperature-programmed pyrolysis of a bituminous coal, the rate profile of HCl formation shows the small, main and shoulder peaks at 380, 490 and 580℃, respectively, and the peak at 380℃ almost disappears after water washing. The Cl 2p XPS measurements suggest that part of the HCI evolved at≦420℃ during pyrolysis arises from water-soluble Cl functional groups in coal, and that it may react with the carbon in the nascent char to form organic chlorides. In the CO_2 gasification of two chars at 1000℃, no measurable amounts of HCI and Cl_2 are detectable, irrespective of the extent of char conversion, but water-soluble Cl-species can be detected significantly.
一般社団法人日本エネルギー学会の論文
2005-11-17