Abstract
The studies of influence on irradiation of coals with ultra-high pressure mercury lamp were carried out in the presence of 2-propanol and Rh complex catalyst. The yields of benzene soluble fractions increased by photo-irradiation compared with non-irradiated. The average molcular weight of benzene soluble fractions decreased using Nakayama coaland increased using Yubari coal by photo-irradiation. These tendencies were also found in molcular distribution from gel permeation chromatograms. These changes of benzene fractionsof irradiated coals more increased using photocatalyst. These results suggest that the coals decomposed partially by photo-irradiation.
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