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Hollow fiber carbon molecular sieve membranes and method of manufacturing using radial-flow pyrolysis

  • US 10,543,462 B2
  • Filed: 12/29/2016
  • Issued: 01/28/2020
  • Est. Priority Date: 12/14/2016
  • Status: Active Grant
First Claim
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1. A method for manufacturing a plurality of hollow fiber CMS membranes, comprising the steps of:

  • heating, in a pyrolysis chamber, a bundle of polymeric membranes comprising a plurality of green, polymeric hollow fiber membranes oriented so that first and second ends of the plurality of green, polymeric hollow fiber membranes are disposed at first and second ends of the bundle, the bundle of polymeric membranes having a length dimension that is greater than its width and thickness dimensions, said heating step being performed at a temperature and time duration sufficient to pyrolyze the plurality of green, polymeric hollow fiber membranes; and

    directing a flow of pyrolysis gas during said heating step through said bundle in a direction perpendicular to the length direction of the bundle, wherein performance of said heating step results in production of pyrolysis off-gases and said flow of pyrolysis gas sweeps the pyrolysis off-gases away from the plurality of green, polymeric hollow fiber membranes.

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