EPDM as a selective membrane material in pervaporation |
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| Institution: | 1. TNO Industry, P.O. Box 6235, 5600 HE Eindhoven, The Netherlands;2. ATO-DLO, P.O. Box 17, 6700 AA Wageningen, The Netherlands;3. Faculty of Chemical Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;1. Research Group in Environmental Engineering (GI2AM), Department of Chemical Engineering, School of Engineering, University of Valencia, Avda. Universitat s/n, 46100 Burjassot, Spain;2. Research Group in Materials Technology and Sustainability (MATS), Department of Chemical Engineering, School of Engineering, University of Valencia, Avda. Universitat s/n, 46100 Burjassot, Spain;1. Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada;2. SUEZ Water Technologies & Solutions, Minnetonka, MN, USA;1. Institute of Chemical Process Fundamentals of the ASCR, v.v.i., Rozvojova 2/135, CZ-165 02 Prague 6 Suchdol, Czech Republic;2. Institute of Chemical Technology Prague, Technická 5, CZ-166 28 Prague 6 Dejvice, Czech Republic;1. Membrane Separations Group, Chemical Engineering Division, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India;2. Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, 500007, India |
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| Abstract: | Various types of ethylene–propylene-diene terpolymers (EPDM) and crosslinking procedures have been investigated with pervaporation, vapor sorption, liquid sorption and gas permeation experiments. The EPDM parameters that have been changed are ethylene content, molecular weight, choice of third monomer, type of branching and various crosslinking procedures.The permeability coefficients were determined from pervaporation experiments and were about 40,000 Barrer for toluene and 700 Barrer for water. However, from vapor sorption measurements, a value of 22,000 Barrer for toluene was obtained which is somewhat lower. It should be realized that these data can only be compared qualitatively; the permeabilities obtained from sorption isotherms are derived data while in case of the pervaporation experiments it is experimentally measured.There is an indication that toluene behaves independently from water but the presence of toluene does influence the water flux during pervaporation. Gas permeation experiments resulted in permeabilities for CO2, O2 and N2 of 120, 24 and 11 Barrer, respectively. No clear differences were found for both EPDM-variation and different crosslinking procedures. |
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