Carbon hollow fiber membranes for a molecular sieve with precise-cutoff ultramicropores for superior hydrogen separation

Linfeng Lei, Fengjiao Pan, Arne Lindbråthen, Xiangping Zhang, Magne Hillestad, Yi Nie, Lu Bai, Xuezhong He () and Michael D. Guiver ()
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Linfeng Lei: Norwegian University of Science and Technology
Fengjiao Pan: Chinese Academy of Sciences
Arne Lindbråthen: Norwegian University of Science and Technology
Xiangping Zhang: Chinese Academy of Sciences
Magne Hillestad: Norwegian University of Science and Technology
Yi Nie: Chinese Academy of Sciences
Lu Bai: Chinese Academy of Sciences
Xuezhong He: Norwegian University of Science and Technology
Michael D. Guiver: Tianjin University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Carbon molecular sieve (CMS) membranes with rigid and uniform pore structures are ideal candidates for high temperature- and pressure-demanded separations, such as hydrogen purification from the steam methane reforming process. Here, we report a facile and scalable method for the fabrication of cellulose-based asymmetric carbon hollow fiber membranes (CHFMs) with ultramicropores of 3–4 Å for superior H2 separation. The membrane fabrication process does not require complex pretreatments to avoid pore collapse before the carbonization of cellulose precursors. A H2/CO2 selectivity of 83.9 at 130 °C (H2/N2 selectivity of >800, H2/CH4 selectivity of >5700) demonstrates that the membrane provides a precise cutoff to discriminate between small gas molecules (H2) and larger gas molecules. In addition, the membrane exhibits superior mixed gas separation performances combined with water vapor- and high pressure-resistant stability. The present approach for the fabrication of high-performance CMS membranes derived from cellulose precursors opens a new avenue for H2-related separations.

Date: 2021
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DOI: 10.1038/s41467-020-20628-9

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