Modification of polycarbonate membrane by polyethylene glycol for CO2/CH4 separation
Paper ID : 1399-MST2015-FULL
zahra hamrahi *1, Ali Kargari2
1Young Researchers and Elite Club, Omidieh Branch, Islamic Azad University, P.O. Box 164, Omidieh, Iran
2Dept. Chemical Eng.-Amirkabir University of Technology
In this study, the permeation of carbon dioxide and methane through polycarbonate/ polyethylene glycol (PC/PEG300) polymeric blend membranes was investigated. The effect of PEG300 content on the selectivity, diffusivity and solubility coefficients was considered. Gas permeability measurements were carried out by CO2 and CH4 at pressures of 1 to 7 bar and room temperature. The characterization of the membranes by SEM and DSC revealed that the PC/PEG300 blends are miscible without considerable microphase separation. The permeability results showed that the addition of PEG300 into PC increased CO2/CH4 selectivity. By the addition of 5 wt.% of PEG300, the CO2/CH4 selectivity was increased from 26.6 to 40.9 (more than 53%), while the CO2 permeability was decreased from 9.39 to 6.68 Barrer (about 40%) at room temperature and 1 bar which is attributed to the plasticization effect of PEG300 on PC membranes.
Blend membrane, Selectivity, Permeability, Polycarbonate, Polyethylene glycol, CO2/CH4 separation
Status : Paper Accepted (Poster Presentation)