NONISOTHERMAL FACILITATED TRANSPORT .3. DETERMINATION AND PREDICTION OF SIMPLIFIED PHENOMENOLOGICAL DIRECT AND CROSS COEFFICIENTS - HEAT AND OR MASS DRIVEN TRANSPORTS/

The tentative evaluation of the linear phenomenological coefficients r elative to the non-isothermal facilitated transport of orthoboric acid in solution (liquid system) and carbon dioxide (gas) through syntheti c ion exchange membranes, using counterions as carriers, was investiga ted. In the absence of significant volume flow or electromigration, Li near nux equations for heat and mass transport as a function of the tw o driving forces, heat and chemical potential gradients, were proposed . Constant or linearly dependent direct and cross phenomenological coe fficients were evaluated considering the difference of non-isothermal and isothermal transports. Moreover it was shown that for facilitated mechanisms without leakage, all the coefficients can be predicted from a single coefficient, e.g. from the isothermal mass flux, if the heat of association Delta H of the carrier with the transported species is known. Amplification of flux, antagonism of the forces, heat or mass pumps were described and compared with existing data including predict ions based on equilibria. Efficient second generation experimentation is proposed.