Evaluation of the separation efficiency of some processes based on interaction of reactive species with a static, spatially periodic potential

A procedure is proposed to achieve the selective extraction of any given sp ecies from a mixture of closely related molecules exhibiting similar thermo dynamic and kinetic properties. It is based on exposing the mixture to a re active, out-of-equilibrium medium in the presence of a static and spatially periodic potential. Optimal results are obtained upon satisfying stochasti c resonance conditions involving the rate constants, the diffusion coeffici ents of the chemical species, and the characteristic features of the period ic potential. In the case of an electric field, the corresponding relations are shown to be compatible with the current level of experimental achievem ent.