Abstract
The separation of oxygen from gas mixtures of oxygen and nitrogen with a liquid membrane system supported by microporous polypropyrene membrane (Celgard) with [N, N'-bis (salicylidene) dipropylenetriamine] cobalt (II) as the carrier was examined. when the 1 : 1 mixture of dimethylsulfoxide and dimethylacetamide was used as the diluent solvent, the maximum oxygen content of 79% was obtained with this liquid membrane system. The initial permeation flux was well explained by the transport mechanism with a reversible instantaneous reaction. The degradation of the permeation rate was observed which was caused by the irreversible oxydation reaction of the carrier. It was demonstrated that the renewal of the membrane phase is effective for the recovery of this degradation.
