| || Preparation of gas separation membranes and their evaluation
Author : Chauhan, R. S. ;Pandey , P.
Source : Defence Science Journal ; Vol:54(3) ; 2004 ; pp 335-343
Subject : 57 Biological Sciences
Keywords : Permeability;Asymmetric membrane;Phase inversion technique;Membrane selectivity;Polysylfone
Abstract : "Asymmetric membranes have been prepared from the polysulfone using dry-wet phase-inversion technique. These membranes show a thin dense skin at one surface and porous substructure underneath. Test facility has been developed in-house to evaluate the permeability as well as the selectivity of membranes. In addition an online permeate composition analysis system has also been setup to quantify the concentration of the two major components of atmospheric air, namely oxygen and nitrogen using a gas chromatograph. Membranes have been tested at various feed pressures. The developed membranes are capable of enriching atmospheric air to a level of 30 per cent and more. Keywords: Asymmetric membrane, phase-inversion technique, permeability, membrane selectivity, polysylfone"