EFFECTIVENESS FACTORS FOR PHOTOCATALYTIC REACTIONS OCCURRING IN PLANAR MEMBRANES

Effectiveness factors for porous catalysts have been determined for ph otocatalytic reactions characterized by integer order and by generaliz ed Langmuir-Hinshelwood/Hougen-Watson rate expressions. The geometry o f interest is a planar porous membrane that is illuminated from either the front or the rear by a planar light source. Effectiveness factors for these systems depend not only on Thiele moduli defined herein but also on the product of the effective membrane thickness and the optic al absorption coefficient of the porous membrane.