Studies on different gas separation modes with hollow fiber contained liquid membrane

Feasibility of gas purification using novel hollow fiber contained liquid membrane (HFCLM) technique under four different operational modes such as, sweep gas, sweep liquid, conventional permeation and vacuum, has been investigated. Separation of binary gas mixtures containing CO{dollar}sb2{dollar} and N{dollar}sb2{dollar} and CO{dollar}sb2{dollar} and CH{dollar}sb4{dollar} have been studied with special emphasis on model biogas mixture. Separation and purification through nonreactive liquid membrane e.g., water and reactive liquid membranes such as, aqueous solution of potassium carbonate and aquoeus solutions of diethanolamine (DEA) were investigated. Permeation models were proposed for all the modes and compared with the experimental results. Pure CO{dollar}sb2{dollar} permeation studies through water were carried out to determine the effective liquid membrane thickness in different HFCLM permeators. Models for the facilitated transport CO{dollar}sb2{dollar} through reactive liquid membranes were also proposed. Observed CO{dollar}sb2{dollar} {dollar}-{dollar}N{dollar}sb2{dollar} separation factors through immobilized liquid membranes containing K{dollar}sb2{dollar}CO{dollar}sb3{dollar} or DEA solution were compared with the theoretical predictions.