Abstract
AbstractThe stationary state hypothesis, commonly used for intermediates in complex kinetics in batch reactor studies, is analyzed in a tubular flow photoreactor. For practical values of the rate constants for the chosen kinetic sequence, it appears that the hypothesis is valid over all but a short entrance region of the reactor for both streamline and plug flow models. Even though the stationary state is quickly achieved, for the normal range of diffusivities, the conversion to product may be affected by radial diffusion and velocity profiles.In the course of the analysis the pertinent dimensionless parameters establishing the behavior of the reactor were identified. These arose from the differential equations expressing the conservation of radiant energy and mass in the system.
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