Characteristics of permeation and separation for acetic acid-water mixtures through poly(vinyl alcohol) membranes modified with poly(acrylic acid)


Asman G. , Sanli O.

Separation Science and Technology, cilt.38, sa.9, ss.1963-1980, 2003 (SCI Expanded İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38 Konu: 9
  • Basım Tarihi: 2003
  • Doi Numarası: 10.1081/ss-120020129
  • Dergi Adı: Separation Science and Technology
  • Sayfa Sayıları: ss.1963-1980

Özet

The pervaporation separation of acetic acid-water mixtures was carried out over the full range of compositions at temperatures varying from 30° to 55°C using poly(vinyl alcohol) (PVA) membranes modified with poly(acrylic acid) (PAA). The best condition for the preparation of the membranes was found as PVA/PAA ratio as 75/25 (v/v). Effects of membrane thickness, operation temperature, feed composition on the permeation flux, and separation factor were investigated. PVA/PAA membranes gave separation factors of 34 to 3548 permeation rates of 0.03 to 0.60 kg/m2h, depending on the operation temperature and feed mixture composition. The temperature dependence of permeation rate for binary mixtures was expressed by the Arrhenius type relation and activation energy of 17.62 kcal/mol was calculated for the permeation.