Carbon molecular sieve membranes for hydrogen purification from a steam methane reforming process

Linfeng Lei, Arne Lindbråthen, Magne Hillestad, Xuezhong He*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Asymmetric carbon molecular sieve (CMS) membranes prepared from cellulose hollow fiber precursors were investigated for H2/CO2 separation in this work. The prepared carbon membrane shows excellent separation performance with H2 permeance of 111 GPU and an H2/CO2 selectivity of 36.9 at 10 bar and 110 °C dry mixed gas. This membrane demonstrates high stability under a humidified gas condition at 90 °C and the pressure of up to 14 bar. A two-stage carbon membrane system was evaluated to be techno-economically feasible to produce high-purity H2 (>99.5 vol%) by HYSYS simulation, and the minimum specific H2 purification cost of 0.012 $/Nm3 H2 produced was achieved under the optimal operating condition. Sensitivity analysis on the H2 loss and H2 purity indicates that such membrane is still less cost-effective to achieve ultrapure hydrogen (e.g., >99.8 vol%) unless the higher operating temperatures for carbon membrane systems are applied.

Original languageEnglish
Article number119241
JournalJournal of Membrane Science
Volume627
DOIs
StatePublished - 1 Jun 2021

Keywords

  • Carbon molecular sieve membranes
  • Gas separation
  • Hydrogen purification
  • Process simulation
  • Steam methane reforming

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