Abstract
AbstractA variation of the capillary column inverse gas chromatography (IGC) experiment is proposed to measure the thermodynamics and diffusion coefficients in ternary polymer–solvent–solvent systems, and a theoretical model has been developed for this proposed experiment. The model has been derived to include both main and mutual cross‐diffusion coefficients. Ternary vapor–liquid equilibria was represented by a coefficient matrix of the isotherm tangents. The governing equations of the model were uncoupled and solved using both an analytical Laplace transform technique and a numerical finite‐difference technique. Solution of the model shows that in the presence of strong cross‐diffusion and thermodynamic coefficients, unusual chromatographic behavior can be observed, suggesting that IGC can be a useful technique for measuring thermodynamic and mass‐transport properties of ternary polymer–solvent–solvent systems. © 2005 American Institute of Chemical Engineers AIChE J, 2005
Published Version
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