Separation characteristics of acetic acid-water mixtures using poly(vinyl alcohol-g-4-vinyl pyridine) membranes by pervaporation and temperature difference evapomeation techniques

Asman G., Sanli O.

JOURNAL OF APPLIED POLYMER SCIENCE, cilt.100, sa.2, ss.1385-1394, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 100 Sayı: 2
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1002/app.23676
  • Dergi Adı: JOURNAL OF APPLIED POLYMER SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.1385-1394
  • Gazi Üniversitesi Adresli: Evet

Özet

The separation of acetic acid-water mixtures was carried out using pervaporation (PV) and temperature difference evapomeation (TDEV) methods. For the separation process, 4-vinyl pyridine was grafted on poly(vinyl alcohol). Membranes were prepared from the graft-copolymer by casting method and crosslinked by heat treatment. The effects of feed composition on the separation characteristics were studied and the performances of the separation methods were compared. Permeation rates were found to be high in PV whereas separation factors were high in TDEV method. Membranes gave permeation rates of 0.1-3.0 kg/m(2)h and separation factors of 2.0-61.0 depending on the composition of the feed mixture and the method.