Using the Maxwell-Stefan formulation for highlighting the influence of interspecies (1−2) friction on binary mixture permeation across microporous and polymeric membranes
2017
Krishna, R.
The Maxwell-Stefan (M-S) “frictional” formulation has been used to develop a unified description of mixture permeation across membranes consisting of thin layers of zeolites, metal-organic frameworks or polymers. Explicit analytic expressions are derived for determining the fluxes for steady-state permeation of binary mixtures of species 1 and 2 across a membrane (m), clearly delineating the relative influences of the 1-m, 2-m and interspecies (1−2) frictional contributions. Simplified expressions are derived for two limiting scenarios: negligible 1–2 friction and dominant 1–2 friction; these scenarios help to determine the upper and lower bounds of permeation fluxes and selectivities. The developed model is used to analyze a wide variety of published experimental data on mixture permeation across zeolite and polymer membranes. In each case, the influence of 1–2 friction is analyzed. In cases such as pervaporation across polymer membranes, the 1–2 frictional contribution is found to be extremely significant.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library