Studies on the Carbonization of Coals and Related Compounds (II):Determination of Functional Groups in Chars

概要

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Functional groups in chars were determined in order to obtain as complete pictures as possible of the char structure. Hydroxyl group was determined by the acetylation method, the methylation method with diazomethane and the Grignard reagent method respectively, and carbonyl group by the hydroxylamine method and the Grignard reagent method. Satisfactory results were obtained by these methods on cellulose chars, except the Grignard reagent method.<BR>The amounts of non-reactive oxygen in cellulose chars are more than in coals simillar in carbon contents. In the carbon content range 90-96 percent in these chars, the contents of hydroxyl and carbonyl oxygen lower gradually, however, that of non-reactive oxygen falls rapidely. At carbon contents above 98 percent oxygen is almost non-reactive and hydroxyl oxygen is present in small amount.
一般社団法人日本エネルギー学会の論文