Selective Removal of Butanol from Aqueous Solution by Pervaporation with a PIM-1 Membrane and Membrane Aging

0446087 - ÚCHP 2016 RIV GB eng J - Journal Article
Žák, Michal - Klepić, M. - Červenková Šťastná, Lucie - Sedláková, Zuzana - Vychodilová, Hana - Hovorka, Š. - Friess, K. - Randová, A. - Brožová, Libuše - Jansen, J. C. - Khdhayyer, M.R. - Budd, P.M. - Izák, Pavel
Selective Removal of Butanol from Aqueous Solution by Pervaporation with a PIM-1 Membrane and Membrane Aging.
Separation and Purification Technology. Roč. 151, SEP 4 (2015), s. 108-114. ISSN 1383-5866. E-ISSN 1873-3794
R&D Projects: GA ČR(CZ) GAP106/12/0569
Institutional support: RVO:67985858 ; RVO:61389013
Keywords : PIM membrane * aging of polymer membrane * pervaporation
Subject RIV: CI - Industrial Chemistry, Chemical Engineering; CD - Macromolecular Chemistry (UMCH-V)
Impact factor: 3.299, year: 2015

In this work, the selective removal of butanol from aqueous solution by pervaporation with a PIM-1 membrane was studied. The freshly cast and aged (370 days) PIM-1 membrane was used for pervaporation experiments at 50 °C. The aged PIM-1 membrane exhibited a dramatic decrease in permeability compared to the freshly cast membrane, from 14 to 2 mg/m/h, but simultaneously a tremendous increase of selectivity, from 24 to 47, for the separation process at 2 wt.% of butanol. The aging effect may be attributed to slow rearrangement of polymer chains, resulting in densification and reduction of accessible free volume. Pervaporation with the PIM-1 membrane was found to be effective only for low concentration of butanol in an aqueous feed, i.e. an increasing butanol concentration in the feed led to a decrease of the enrichment factor.
Permanent Link: http://hdl.handle.net/11104/0249832