3.UV/VIS吸収および蛍光分析法によるヴィクトリア褐炭中の芳香族環構造の評価

抄録

An attempt was made for obtaining UV/VIS absorption and fluorescence spectra of a whole Victorian brown coal and then examining the presence and abundance of poly-condensed aromatic ring systems (ARSs) in the coal. More than 99% of Loy Yang brown coal dissolved into aqueous NaOH solution at 473K. The absorption spectrum of the solubilized coal gives a direct indication of presence of ARSs with three to six condensed rings. Difference between the spectra of the solubilized coal and those of a tar sample from pyrolysis of the coal suggests that smaller ARSs are released as tar from the coal to preferentially to larger ARSs during the pyrolysis.