低圧水銀灯を照射した光反応器内の光強度分布　　光源の波長分布の影響

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  • Light Intensity Profiles in Photoreactors Applied by a Low Pressure Mercury Lamp
  • 光源の波長分布の影響

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Light distribution characteristics of the resonance and the other spectra of mercury vapor emitted from a low pressure mercury lamp were precisely examined with a sharp directional photodetector and a potassium iron (III) oxalate chemical actinometer.<BR>The characteristic of the self-absorptive resonance line was diffuse, and that of the other lines was also intrinsically diffuse though the latter had been assumed to be specular. A lamp, whose diameter and length were 25 mm and 870 mm, respectively, could safely be assumed a line source when it was separated from the reaction vessel by more than about 80 mm.<BR>It was shown by numerical examples that the differences in light distribution characteristics greatly affected the scale-up of a trough-type, a plate-type and an annular photoreactor.

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