Ammonia selective hollow fibers

Vincenzo Tricoli, E. L. Cussler

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Microporous polypropylene hollow fibers can be coated with a 1.9 μm layer of perfluorosulfonic acid polymer ('Nafion'), to give membranes selective for ammonia. The permeability, of the order of 104 barrers, is comparable with that obtained previously for thick flat perfluorosulfonic acid membranes, though the permeance is much higher. The selectivity for ammonia over hydrogen can be as high as 500:1 at room temperature; it is much higher for ammonia over nitrogen. This selectivity drops as the temperature rises. These composite membranes will be commercially valuable if they can be made to withstand the high pressures characteristic of ammonia synthesis.

Original languageEnglish (US)
Pages (from-to)19-26
Number of pages8
JournalJournal of Membrane Science
Volume104
Issue number1-2
DOIs
StatePublished - Aug 15 1995

Keywords

  • Coated hollow fibers
  • Gas separations
  • Ion exchange membranes

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