Interfacial transfer studied with a rotating diffusion cell
Abstract
The construction of a diffusion cell is described in which species diffuse through a rotating disc of filter paper. Correct rotating disc hydrodynamics are established on both sides of the filter. Liquid liquid interfaces can be established on either side of the filter and the rate at which species are transferred from one phase to the other can be measured. By extrapolation to infinite rotation speed the rate constant for the transfer reaction at the interface can be measured. Results for 11 systems are reported. The rate constant for the interfacial transfer in the downhill direction is found for each system to be approximately 10–5 m s–1. The activation parameters for two systems are also reported.
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