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

0475966 - ÚCHP 2022 RIV HR eng J - Journal Article
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. E-ISSN 1846-5153.
[International Congress of Chemical and Process Engineering CHISA 2016 /22./. Prague, 27.08.2016-31.08.2016]
R&D Projects: GA MŠMT(CZ) LD14094
Institutional support: RVO:67985858
Keywords : gas/vapour separation * low-density polyethylene * thin-film-composite membrane
OECD category: Chemical process engineering
Impact factor: 1.383, year: 2017
Method of publishing: Open access
http://silverstripe.fkit.hr/cabeq/assets/Uploads/03-2-2017.pdf

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.

Permanent Link: http://hdl.handle.net/11104/0272958