The transport of dissolved carbon dioxide through silicone rubber was studied as a function of concentration levels and membrane thicknesses. Investigations were made under steady‐state conditions only. A necessary provision to the determinations of permeability coefficients was the development of measuring the concentration of dissolved carbon dioxide in water. A method called “gas phase analysis” was developed. This procedure involves analysis of gas phase samples above CO2‐H2O solutions sealed in equilibrium vessels. The permeability was found to be very nearly independent of concentration level. The previously developed equation relating the reciprocals of permeability and membrane thickness was used to explain the experimental data. The importance of boundary resistance was emphasized.
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Hwang et al. (1973) studied this question.
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