Abstract
Bituminous coal mixed with ferric oxide was heated at 300, 350, 400 and 450°C and reaction of ferric oxide and the coal was studied from the change of reaction products.For the coal mixed with ferric oxide, heating loss of coal or tar yield decreased, while evolving gas slightly increased, but functional groups of oxygen of heated residue were not influenced by ferric oxide. On the other hand some of ferric oxide was reduced distinctly to ferrous oxide and metallic iron at the plastic temperature of coal.From these results, reduction of ferric oxide was deduced principally by de-hydrogenation of active methylene of coal which was supported by model reaction of ferric oxide with some pure organic substances such as tetraline, 9, 10-dihydrophenanthrene, 9, 10-dihydroanthracene and 1-methylnaphthalene, .
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