High-Efficiency Separation of an Ethylene/Ethane Mixture by a Large-Scale Liquid-Membrane Contactor Containing Flat-Sheet Nonporous Polymeric Gas-Separation Membranes and a Selective Flowing-Liquid Absorbent

D. G. Bessarabov, R. D. Sanderson, E. P. Jacobs, I. N. Beckman
1995 Industrial & Engineering Chemistry Research  
Ethylene and ethane were effectively separated from a mixture comprising these two gases by means of a large-scale liquid-membrane contactor (membrane permabsorber). The contactor comprised composite flatsheet membranes with a nonporous diffusional layer made from polyblock copolymer poly(dimethylsiloxane)/poly(phenylsilsesquioxane) and an aqueous solution of silver nitrate flowing along turbulence-promoter spacers between the membranes. The membrane permabsorber permitted ethylene and ethane
more » ... hylene and ethane to be separated effectively from a binary mixture. The problem with the selection of suitable membranes is discussed. It was shown that the efficiency of the separation process could be varied by changing the liquid-flow rate, the membrane area, the concentration of the selective carrier in the liquid, the temperature of the liquid absorbent, and the gas-separation properties of the membranes.
doi:10.1021/ie00044a028 fatcat:mjyroltodngz3jldha2vd3yfp4