Počet záznamů: 1  

CO2/CH4 Separation Performance of Ionic-Liquid-Based Epoxy-Amine Ion Gel Membranes under Mixed Feed Conditions Relevant to Biogas Processing.

  1. 1. 0472810 - UCHP-M 2017 RIV NL eng J - Článek v odborném periodiku
    Friess, K. - Lanč, M. - Pilnáček, Kryštof - Fíla, V. - Vopička, O. - Sedláková, Zuzana - Cowan, M.G. - McDaniel, W.M. - Noble, R.D. - Gin, D.L. - Izák, Pavel
    CO2/CH4 Separation Performance of Ionic-Liquid-Based Epoxy-Amine Ion Gel Membranes under Mixed Feed Conditions Relevant to Biogas Processing.
    Journal of Membrane Science. Roč. 528, APRIL (2017), s. 64-71 ISSN 0376-7388
    Grant CEP: GA ČR GA14-12695S; GA MŠk LH14006; GA TA ČR TE01020080
    Institucionální podpora: RVO:67985858
    Klíčová slova: epoxy-amine-based ion gel membranes * biogas processing * humid mixed-gas permeation
    Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství
    Obor OECD: Chemical process engineering
    Impakt faktor: 6.578, rok: 2017

    The CO2/CH4 separation performance under humidified mixed feed conditions relevant to biogas separation is reported for supported, epoxy-amine-based ion gel membranes containing fixed-site amine facilitated CO2 transport carriers. The chemical composition of the ion gel membranes consists of combination of the bis(epoxide)-IL monomer and trifunctional amine monomer in a mole ratio 3:2 plus either 50 or 75 wt. % free [EMIM][Tf2N], impregnated into a Omnipore™ support film. Prepared samples were examined for fundamental structure/property relationships via permeation and sorption methods. Gas sorption confirmed specific gas interactions, showing elevated CO2 sorption compared to CH4 with increasing equilibrium feed pressure. Single gas permeation demonstrated almost a three-fold increase in CO2 permeability from 195 Barrer for 50 wt. % of free [EMIM][Tf2N] to 525 Barrer for 75 wt. % of ionic liquid while the ideal selectivity α(CO2/CH4) stayed almost the same (20 and 18, respectively). The effects of feed composition, feed pressure, and relative humidity (32% and 54%) on the CO2/CH4 separation performance were elucidated for mixed-gas feeds. Under simulated biogas processing conditions, an increase of CO2/CH4 separation factor from 25 to 35 with increasing humidity and low feed pressure was observed. Such behavior indicates that the fixed-sitecarrier facilitated CO2 transport mechanism enhances also the CO2/CH4 separation performance of studied membranes, as observed for the CO2/N2 mixtures studied previously. This feature also enables them to reach a performance level close to the 2008 Robeson plot upper bound.
    Trvalý link: http://hdl.handle.net/11104/0270032
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