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Asymmetric modified carbon molecular sieve hollow fiber membranes having improved permeance

  • US 9,815,030 B2
  • Filed: 09/30/2014
  • Issued: 11/14/2017
  • Est. Priority Date: 09/30/2013
  • Status: Active Grant
First Claim
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1. A process for preparing an asymmetric modified carbon molecular sieve hollow fiber membrane having improved gas separation performance properties comprisinga. providing an asymmetric polymer hollow fiber,b. contacting the polymer fiber with a solution comprising a modifying agent,c. contacting the polymer fiber of step b. with a moisture-containing atmosphere to form a treated polymer fiber, andd. pyrolyzing the treated polymer fiber to form an asymmetric modified carbon molecular sieve hollow fiber membrane having an improved gas permeance,wherein the concentration of the modifying agent in the solution is selected to obtain an asymmetric modified carbon molecular sieve hollow fiber membrane having an improved gas permeance.

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