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A Novel Time Lag Method for the Analysis of Mixed Gas Diffusion in Polymeric Membranes by On-Line Mass Spectrometry: Method Development and Validation.
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SYSNO ASEP 0493318 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A Novel Time Lag Method for the Analysis of Mixed Gas Diffusion in Polymeric Membranes by On-Line Mass Spectrometry: Method Development and Validation. Author(s) Fraga, S. (PT)
Monteleone, M. (IT)
Lanč, M. (CZ)
Esposito, E. (IT)
Fuoco, A. (IT)
Giorno, L. (IT)
Pilnáček, K. (CZ)
Friess, K. (CZ)
Carta, M. (GB)
McKeown, N.B. (GB)
Izák, Pavel (UCHP-M) RID, ORCID, SAI
Petrusová, Zuzana (UCHP-M) RID, ORCID, SAI
Crespo, J. (PT)
Braziniha, C. (PT)
Jansen, J.C. (IT)Source Title Journal of Membrane Science. - : Elsevier - ISSN 0376-7388
Roč. 561, SEP 1 (2018), s. 39-58Number of pages 20 s. Language eng - English Country NL - Netherlands Keywords gas separation membrane ; mixed gas diffusion ; time lag method Subject RIV CI - Industrial Chemistry, Chemical Engineering OECD category Chemical process engineering Institutional support UCHP-M - RVO:67985858 UT WOS 000434713700005 EID SCOPUS 85047365249 DOI 10.1016/j.memsci.2018.04.029 Annotation A novel method to determine the individual diffusion coefficients of gases in a mixture during their permeation through polymeric membranes is described. The method was developed in two independent laboratories, using rubbery Pebax® and glassy Hyflon® AD60X membrane samples as standards, and validated using the Tröger s base containing Polymer of Intrinsic Microporosity, PIMEA-TB. Monitoring of the permeate composition in real time by a quadrupole mass spectrometer allowed the analysis of the permeation transient for gas mixtures. Two operation modes, either with a vacuum in the permeate and a direct connection to the mass spectrometer via a heated restriction, or using a sweeping gas and a heated capillary sample inlet, give excellent agreement with the traditional time lag method for single gases. A complete overview of the method development, identification of the critical parameters, instruments calibration, data elaboration and estimation of the experimental accuracy are provided. Validation with PIM-EA-TB, shows that the method can also successfully detect anomalous phenomena, related to pressure and concentration dependency of the transport properties, physical aging or penetrant-induced dilation. Rapid online analysis of the permeate composition makes the method also very suitable for routine mixed gas permeability measurements. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2019
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