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Gas separation by permeation Part II: Effect of permeate pressure drop and choice of permeate pressure
Author(s) -
Pan C.Y.,
Habgood H. W.
Publication year - 1978
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450560208
Subject(s) - permeation , pressure drop , membrane , natural gas , fiber , cascade , helium , materials science , hollow fiber membrane , chromatography , chemistry , petroleum engineering , mechanics , composite material , engineering , organic chemistry , physics , biochemistry
Calculation methods for determining pure gas permeabilities and gas separation performance of hollow fiber modules with significant permeate pressure drop inside the fiber are presented. A sequential optimization method for determining the near‐optimum permeate pressures in cascade operation is developed. It is shown that the performance of narrow hollow fiber modules can be significantly affected by the permeate pressure build‐up inside the narrow fiber. For a given module and given recovery there exists an optimum permeate outlet pressure which minimizes the membrane and permeate compression costs. Examples given relate to the recovery of helium from natural gas.