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The angular light intensity distribution (ALID) at the surface of several elliptical reflector‐photoreactors was determined experimentally using the optically dense potassium ferrioxalate actinometer. The distributions were well correlated by the model The correlating parameter β was a function of the ratio of the light source and photoreactor tube diameters. The theoretical effect of ALID on reactor performance was determined for a reaction which proceeded via direct absorption by the reactant. The ALID effect on performance was most pronounced under conditions of high optical densities and low radial mixing rates of reactant.
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Zolner et al. (1972) studied this question.
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