41.硝酸処理炭の熱分解反応

抄録

The four kinds of coal samples, Wandoan, Datong, Taiheiyo and Mequinenza, were treated by nitric acid and the inorganic sulfur compounds in coal were eliminated. The amount of hydrogen sulfide liberated from coals with nitric acid treatment during the pyrolysis in hydrogen flow were increased in comparison with raw coals and its liberation curves plotted against temperature were also changed. It was suggested from <13>^C-NMR and FT-IR measurement of raw and treated coal samples that the oxidation of coals by nitric acid treatment was not remarkable, while the amounts of aliphatic carbons in treated coals were slightly decreased.