11.酸素酸化による褐炭の解重合機構

抄録

Morwell brown coal (ML) was oxidized in Na_2CO_3 aqueous solution at 85℃, into which atmospheric oxygen gas was bubbled. Analysis of products revealed that aromatic clusters were selectivity decomposed by the oxidation. When a cluster was decomposed, aromatic carbons attached to inter-cluster bridges were converted into C=O or COOH as a peripheral of neighboring clusters, others into organic acids and volatiles. A clear relationship was found between the loss of aromatic carbons and the gain of peripherals and therefrom the average coordination number of the macromolecular network was estimated. Characteristics of the degradation were qualitatively in good agreement with those for a statistical polymer network.