Comparison of Single and Double-Network PVA Pervaporation Performance: Effect of Operating Temperature

  • Asmaa Selim
    Affiliation

    Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P. O. B. 91, Hungary
    Chemical Engineering and Pilot Plant Department, National Research Centre, 33 El Buhouth Street, 12622 Cairo, Egypt

  • András József Tóth
    Affiliation

    Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P. O. B. 91, Hungary

  • Enikő Haáz
    Affiliation

    Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P. O. B. 91, Hungary

  • Dániel Fózer
    Affiliation

    Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P. O. B. 91, Hungary

  • Péter Mizsey
    Affiliation

    Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P. O. B. 91, Hungary
    Institute of Chemistry, University of Miskolc, H-3513 Miskolc, Egyetemváros, P. O. B. 21, Hungary

Abstract

Thermal crosslinking sequential method applied for DN-PVAs generation efficiently. The swelling measurements investigated that the hydrophilicity of the membrane decreases because of the collaboration of the second thermal crosslinked PVA matrix. The dehydration performance of ethanol solution showed improved using the thermal crosslinked double network PVA membrane. The pervaporation dehydration of the water-ethanol mixture was investigated at different conditions. The separation selectivity showed a significant improvement, while the permeation flux declines due to the incorporation of the second PVA network under 95 % ethanol and at 40 °C. Increasing the feed temperature enhanced the permeability of the membrane, while decreasing the water content in the feed resulted in an increase in the selectivity. The overall results showed that, at high operating temperature and high ethanol concentration in the feed, the prepared membranes are highly selective towards the water with reasonable fluxes values. The influence of temperature permeation parameter and diffusion coefficient of the feed component is also discussed. The negative heat of sorption ( ∆Hs ) values calculated on the basis of the estimated Arrhenius activation energy values indicates that the sorption process is controlled by Langmuir's mode.

Keywords: thermal crosslinking, ethanol dehydration, hydrophilic pervaporation, double network, interpenetration, poly(vinyl alcohol)
Published online
2020-05-15
How to Cite
Selim, A., Tóth, A. J., Haáz, E., Fózer, D., Mizsey, P. “Comparison of Single and Double-Network PVA Pervaporation Performance: Effect of Operating Temperature”, Periodica Polytechnica Chemical Engineering, 64(3), pp. 377-383, 2020. https://doi.org/10.3311/PPch.15214
Section
Articles