Characterization of Thermally Cross-Linkable Hollow Fiber Membranes for Natural Gas Separation

Chien-Chiang Chen, Stephen J. Miller, William J. Koros

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


The performance of thermally cross-linkable hollow fiber membranes for CO2/CH4 separation and the membrane stability against CO2 plasticization was investigated. The fiber membranes were thermally cross-linked at various conditions. Cross-linking temperature was found to have a significant effect, while shorter soak time and the presence of trace oxidizer (O2 or N2O) had a negligible effect. The cross-linked fibers were tested using high CO2 content feeds (50-70% CO2) at a variety of feed pressures (up to 1000 psia), temperatures, and permeate pressures (up to 100 psia) to evaluate membrane performance under various realistic operating conditions. The results demonstrated that cross-linking improves membrane selectivity and effectively eliminates swelling-induced hydrocarbon loss at high pressures. Excellent stability under aggressive feeds (with CO2 partial pressure up to 700 psia) suggests that cross-linked hollow fiber membranes have great potential for use in diverse aggressive applications, even beyond the CO2/CH4 example explored in this work. © 2012 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)1015-1022
Number of pages8
JournalIndustrial & Engineering Chemistry Research
Issue number3
StatePublished - Feb 2 2012
Externally publishedYes


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