Abstract
Three types of cation exchange membranes loaded with Ag + ion are used to study the selective transport of ethene gas in ethene/methane gas mixtures across the membranes. The Ag + ions act as a carrier for selective transport of ethene. The carrier concentration is varied by two methods: (a) partial substitution of Ag + ions by H + ions. The H + ions do not act as a carrier. (b) Introduction of coions (NO − 3) and the corresponding counter-ions (Ag +) into the membrane phase by treatment of the membranes with concentrated aqueous AgNO 3 solutions. The functional relation between the rate of transport of ethene and the carrier concentration reflects structural differences between the membrane matrices.
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