Structural, kinetic and performance characterization of hollow fiber carbon membranes

Xuezhong He, May Britt Hägg*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

The hollow fiber carbon membranes (HFCMs) were prepared from different deacetylated cellulose acetate precursors by controlled carbonization procedure with CO 2 purge gas, a heating rate of 4K/min, a final temperature of 550°C and a final soak time 2h. The SEM images and TGA analysis indicated that the carbon membranes form a symmetric structure and a high average weight loss during the carbonization process. The Langmuir affinity parameters of the carbon membranes were estimated by the CO 2 and N 2 adsorption equilibrium data. The membrane structure parameters of micropore volume, average pore size and d-spacing were determined by the CO 2 adsorption experiments combined with XRD characterization. The kinetic rate constants were also obtained from the CO 2 kinetic adsorption experiments. Single gas permeation tests of H 2, CO 2, O 2, N 2 and CH 4 were conducted to investigate the transport mechanism in the carbon membrane separation process. Moreover, the influences of temperature and feed pressure on the gas separation performances were also studied on the basis of the single gas and gas mixture (synthetic flue gas, CO 2-N 2-O 2) measurements.

Original languageEnglish
Pages (from-to)23-31
Number of pages9
JournalJournal of Membrane Science
Volume390-391
DOIs
StatePublished - 15 Feb 2012
Externally publishedYes

Keywords

  • Adsorption
  • Hollow fiber carbon membrane
  • Kinetic
  • Permeability
  • Selectivity

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