19.褐炭の含酸素官能基の分析

抄録

It is known that brown coal has less degree of coalification and larger oxygen content than bituminous coal. Oxygen atoms are believed to distribute as various kinds of functional groups. Many researchers have tried to reveal the distribution of oxygen functionalities, however, analysis of ether bond is not established yet. In this study, Australian Yallourn (YL) coal, Indonesian South Banko (SB) coal, Indonesian Adaro (AD) coal and American Beulah Zap (BZ) coal were enployed. For these coals, we tried to quantify the oxygen containing functional groups, especially ether bond, by applying new method conbining ether bond cleavage reaction with commonly accepted O-acetylation: according to evaluation of OH group after ether bond cleavage reaction of brown coal, the number of ether bond contained in original coal could be estimated.