Comparison of Hexane Vapour Permeation in Two Different Polymeric Membranes via an Innovative In-Line FID Detection Method.

0475966 - ÚCHP 2018 HR eng J - Článek v odborném periodiku
Petrusová, Zuzana - Morávková, Lenka - Vejražka, Jiří - Vajglová, Zuzana - Jansen, J.C. - Izák, Pavel
Comparison of Hexane Vapour Permeation in Two Different Polymeric Membranes via an Innovative In-Line FID Detection Method.
Chemical and Biochemical Engineering Quarterly. Roč. 31, č. 2 (2017), s. 145-160. ISSN 0352-9568.
[International Congress of Chemical and Process Engineering CHISA 2016 /22./. Prague, 27.08.2016-31.08.2016]
Grant CEP: GA MŠk(CZ) LD14094
Institucionální podpora: RVO:67985858
Klíčová slova: gas/vapour separation * low-density polyethylene * thin-film-composite membrane
Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství
Impakt faktor: 1.383, rok: 2017

This manuscript presents a novel method for the analysis of vapour permeation through polymeric membranes based on in-line analysis of the permeate with an FID
detector. The hexane vapour permeation was studied for two commercially available membranes, namely low-density polyethylene (LDPE) and thin-film-composite polyamide
(PA) membrane. The hexane permeation was studied at temperatures of 25–45 °C, hexane vapour activity in the range of 0.2–0.8 and trans-membrane pressures of 5–50
kPa. Two fundamentally different membranes were chosen to demonstrate the potential and sensitivity of the permeation apparatus. Upon increasing the temperature from 25 to 45 °C, the flux in LDPE was found to increase almost fourfold over the whole activity range. The nonlinear increase of the flux with activity indicates plasticization of the polymer by hexane. Contrarily, the flux in the PA membrane increases almost linearly with activity, with only a minor upward curvature. Since the PA is far away from any phase
transition, it is less temperature-dependent than LDPE. The activation energy for permeation demonstrates that the temperature dependence in the LDPE membrane is dominated by changes in diffusion, whereas it is dominated by changes in solubility in the PA membrane.

Trvalý link: http://hdl.handle.net/11104/0272958