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Concentration history of pervaporation

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Abstract

The permeability and selectivity of the separation of aqueous organic solutions by pervaporation have been studied on semicrystalline poly(ethylene terephthalate) membranes and asymmetric amorphous polyvinyltrimethylsilane membranes in the presence of structural rearrangements initiated by the development of relaxation processes. Attention was focused on the concentration history, which lies in the fact that the permeability and the permeate composition depend on the concentration of the previous solution passed through the membrane at a fixed composition of the feed solution. It has been shown that micropores are formed in both membranes under certain pervaporation conditions and mass transfer occurrs through two competing transport channels. As a result, the oscillatory kinetics of pervaporation and the inversion of separation selectivity in a steady state are observed experimentally.

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References

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Authors and Affiliations

  1. Faculty of Chemistry, Moscow State University, Moscow, 119991, Russia

    E. P. Ageev, N. N. Matushkina & N. L. Strusovskaya

Authors
  1. E. P. Ageev
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  2. N. N. Matushkina
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  3. N. L. Strusovskaya
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Correspondence to E. P. Ageev.

Additional information

Original Russian Text © E.P. Ageev, N.N. Matushkina, N.L. Strusovskaya, 2013, published in Membrany i Membrannye Tekhnologii, 2013, Vol. 3, No. 3, pp. 231–236.

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Ageev, E.P., Matushkina, N.N. & Strusovskaya, N.L. Concentration history of pervaporation. Pet. Chem. 53, 567–571 (2013). https://doi.org/10.1134/S0965544113080021

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  • DOI: https://doi.org/10.1134/S0965544113080021

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