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- W1134013 abstract "The nonlinear equations that govern the variation of molar flow rates and mole fractions in membrane modules for separating binary gas mixtures are solved analytically by asymptotic analysis in {alpha}, the selectivity of the fast gas with respect to the slow gas. The results are explicit analytical expressions that show the effect of process parameters and idealized flow patterns (cross-flow, CF, co-current-flow, CO, and counter-current-flow, CC) on system performance. When the selectivity is low, a regular perturbation analysis shows that the CC module is the most efficient, followed by CF and CO modules, except when p{sub r}, the permeate to feed pressure ratio, is zero in which case the performance of all three is the same. When the selectivity is large, the nature of the problem changes whether the mole fraction of the fast gas on the feed side at the entrance to the module, {chi}{sub in}, is less than or greater than p{sub r}. When {chi}{sub in} > p{sub r}, a singular perturbation analysis of the equations shows that performance is independent of the type of idealized flow pattern in the module. However, when {chi}{sub in} {le} p{sub r}, a regular perturbation analysis shows that the CC module ismore » the most efficient, followed by CF and CO modules. The results presented enable one to gain a quantitative understanding of membrane-based separations without resorting to extensive numerical calculations. 13 refs., 5 figs.« less" @default.
- W1134013 created "2016-06-24" @default.
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- W1134013 date "1989-01-01" @default.
- W1134013 modified "2023-09-27" @default.
- W1134013 title "Asymptotic analysis of performance of membrane modules for gas separations" @default.
- W1134013 hasPublicationYear "1989" @default.
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