MASS-TRANSFER THROUGH A WEAK ACID ION-EXCHANGE MEMBRANE

The mass transport properties of a weak acid membrane are computed at zero co-ion concentration in the ''dusty gas'' model using the homogeneous, the heterogeneous frictional and the Stefan-Maxwell diffusion equations. The transport coefficients computed from independent measurements by the multiple linear regression method show that the surprising experimental results of Despic and Hills (Trans. Faraday Soc. 21, 150, 1956) are described with semi-quantitative precision by the heterogeneous Spiegler and the Stefan-Maxwell diffusion equations,