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Electro-osmotic velocity, electro-osmotic pressure and rate of permeation for acetone/Pyrex sinters are reported in this paper. The range of validity of linear phenomenological relations has been experimentally ascertained. L12 is found to be constant up to potential differences of about 440 V. The second-order coefficient L112 has been estimated from measurements of electro-osmotic pressure and the rate of permeation in the presence of pressure and potential gradients. Streaming potential measurements are also recorded and L21 has been found to be constant up to pressure differences of 100 cm of acetone. Onsager's reciprocal relation has been verified.

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A steady-state mathematical model of a parallel-plate reactor was developed for studying the electrochemical fluorination of organic compounds dissolved in anhydrous hydrogen fluoride. The model incorporates two-phase flow with differential material, energy, and pressure balances. Profiles of temperature, pressure, vapor volume fraction, and current density in the reactor are presented at two inlet temperatures to provide insight into the operation of the reactor. The effects of the inlet temperature, feed flow rate, and cell current on the cell pack voltage and current efficiency of the reactor are presented to determine problematic operating regions for the reactor. Optimum operating currents based on the ratio of the moles of fluorochemical produced to the input energy are also calculated.