469304 Reverse-Selectivity of the Supported Ionic Liquid Membranes

Tuesday, November 15, 2016: 3:57 PM
Cyril Magnin I (Parc 55 San Francisco)
Amir Khakpay, Chemical Engineering, University of Mississippi, Oxford, MS and Paul Scovazzo, Chemical Engineering, University of Mississippi, University, MS

This experimental study explores the reverse-selective potential of RTIL based membranes by lowering the solubility of the non-condensing gases like N2 and CH4. Particular attention was given to the reverse-selective behavior in the propane/methane and propane/nitrogen separations. For this purpose, a series of experiments were conducted in a batch gas permeance system. The permeance of the above-mentioned gases was obtained using polyvinylidene fluoride (PVDF) as the support and [emim][Tf2N], [emim][BF4], [emim][TfO], [emim][DCA], [emim][SCN], and [bmim][NO3] as immobilized room temperature ionic liquid (RTIL). Furthermore, the permeance of CH4 and N2 were investigated in terms of hydrogen bond accepting ability of the RTIL, as an indication of the gas/ionic liquid solution nonideality. The results showed that an increase in the nonideality of the solution leads to a decrease in the permeance of CH4 and N2. By changing the hydrogen bond ability of the RTILs, we were able to increase reverse selectivity of the propane/methane pair from 2 to 7 and the propane/nitrogen pair from 3 to 14.

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See more of this Session: Rapid Fire Session: TED-Sep Separations Division
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