Abstract
Separation Of SO[sub 2] and NO from a simulated gas mixture using the hollow fiber contained liquid membrane (HFCLM) technique has been explored. Separation Of SO[sub 2] from a gas mixture containing SO[sub 2], CO[sub 2], O[sub 2], and N[sub 2] has been studied with pure water and aqueous 1 N NaHSO[sub 3] solution. Combined separation Of SO[sub 2] and NO from a simulated flue gas mixture of SO[sub 2], NO, CO[sub 2], O[sub 2], and N[sub 2] has been achieved utilizing aqueous Fe[sup 2+]EDTA or Fe[sup 3+]EDTA solutions. In both cases, sweep and vacuum modes of operation have been investigated. The HFCLM technique has been applied successfully for flue gas cleanup at 24 C; it was also found to be quite effective at 70 C. A simplified multicomponent gas permeation model based on solution diffusion through the liquid membrane appears to describe the SO[sub 2] separation as well as CO[sub 2] separation through the water membrane satisfactorily for the sweep mode of permeator operation.
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