Modeling and simulation of gas separations with spiral-wound membranes

Robert F. DeJaco, Kenneth Loprete, Kenneth Pennisi, Sudip Majumdar, J. Ilja Siepmann, Prodromos Daoutidis, Hannah Murnen, Michael Tsapatsis

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3 Scopus citations


Models for gas separations with spiral-wound membranes are developed and found to exhibit good agreement with experiments performed on N2/O2 mixtures. The two-dimensional (2D) model can be accurately approximated by a one-dimensional (1D) surrogate model when the spacer widths are chosen to make the channel pressure drops small. Subsequently, the separation of propane/propylene mixtures from the recycle purge stream of a polypropylene reactor is investigated. Assuming ideal gas is found to lead to significant overestimations in membrane stage cuts (sometimes more than 10%), an extent comparable to that associated with extrapolating constant olefin permeance from a low-pressure condition. While olefin permeance can change significantly with pressure, using a constant-permeance formulation can result in a small (< 2.5%) underprediction in stage cut if the value for the permeance is taken from the feed condition. Finally, membrane properties and costs necessary for a viable separation process are discussed.

Original languageEnglish (US)
Article numbere16274
JournalAIChE Journal
Issue number8
StatePublished - Aug 1 2020

Bibliographical note

Publisher Copyright:
© 2020 American Institute of Chemical Engineers


  • Membrane separations
  • computational fluid dynamics (CFD)
  • design (process simulation)
  • gas purification
  • mathematical modeling


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