Selective lamellar microstructure of graphene oxide membrane for gas separation
Paper ID : 1416-MST2015-FULL
1Abbasi Fateme, 2Javad Karimi-Sabet *, 3Cyrus Ghotbi, 4Seyyed Abbas Mousavi, 5zeinab abbasi
1Chemical & Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran
2NFCRS, Nuclear Science and Technology Research Institute, Tehran, Iran
3Chemical & Petroelum Engineering Department, Sharif University of Technology,Tehran, Iran
4Chemical & Petroleum Engineering DepartmentÙˆ Sharif University of Technology, Tehran, Iran
5Chemical & Petroelum Engineering Department, Sharif University of Technology, Tehran, Iran.
A thin film graphene oxide(GO) membranes have been promising potential for gas purification due to thin lamellar microstructure, stable a few atom thick layers and very short intersheet distances. In this research, the nanoporous graphene oxide membranes have been prepared by ultrafiltration on the modified polyacrylonitryle sublayer for helium separation from Nitrogen gas mixture. The separation performance of synthesized GO membrane was controlled by varying concentration of stabilized aqueous GO solution during film filtration. The properties of GO nano sheets and GO membranes have been characterized by X-ray diffraction(XRD), atomic force microscopy(AFM), Fourier transform infrared spectroscopy(FTIR), scanning electron microscopy(SEM) and field emission scanning electron microscopy(FESEM). The effect of GO solution concentration on the membrane synthesis morphology and separation performance was investigated under various operating gas separation conditions (feed pressure and temperature). The results show that change in the GO solution concentration does not hold a linear relationship with the permeability and selectivity for gas separation mixture because of appearing micro cracks in the Go membrane structure. In this study, by tuning GO concentration, a selectivity of 8 was achieved through lamellar structure of GO membrane.
Graphene oxide; lamellar microstructure; membrane; gas separation; helium
Status : Paper Accepted (Poster Presentation)