Author/Authors :
M. Mirzaei School of Chemical Engineering - Faculty of Engineering - Tarbiat Modares University, Tehran, Iran , J. Karimi-Sabet School of Chemical Engineering - Faculty of Engineering, University of Tehran, Tehran, Iran , J. Towfighi-Daryan School of Chemical Engineering - Faculty of Engineering - Tarbiat Modares University, Tehran, Iran , S. M. Hedayat Material and Nuclear Fuel Research School - Nuclear Science and Technology Research Institute, Tehran, Iran , S. Nikkhoo School of Chemical Engineering - Faculty of Engineering, University of Tehran, Tehran, Iran
چكيده لاتين :
In this research we have fabricated nano porous graphene membrane (NPGM) for helium separation from methane. High quality single layer graphene (SLG) was grown on copper foil using chemical vapor deposition method. The quality of Graphene was analyzed using Optical Microscopy (OM) and Raman spectroscopy. Graphene membrane was prepared through graphene transfer to poly vinylidene fluoride (PVDF) substrate and consequently graphene perforation using oxygen radicals generated in UV-Ozone process. Ideal gas separation was accomplished at constant volume condition in a home-made gas separation system at a mean pressure gradient equal to 0.24 bar. It was concluded that graphene exposing to UV wavelength in Oxygen atmosphere has noticeable effect on helium and methane permeance and selectivity. After perforation, both Helium and Methane Permeance increased by 46% and 59%, respectively, whereas selectivity decreased from 1.74 to 1.61.
