On the zeolitic imidazolate framework-8 (ZIF-8) membrane for hydrogen separation from simulated biomass-derived syngas

Hang Yin, Taehee Lee, Jungkyu Choi, Alex C.K. Yip

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Hydrogen separation from biomass-derived syngas is a critical step in the utilization of gasification technology. Compared with the traditional methods, membrane technology provides an effective and low-cost solution for adjusting the gas composition and collecting H2 in syngas environments. In this study, a zeolitic imidazolate framework-8 (ZIF-8)-based membrane, which is a potential candidate for H2 separation from biomass-derived syngas, was successfully fabricated through the seeded (secondary) growth method and the subsequent post-treatments. The prepared ZIF-8 membrane exhibited a modest H2 separation performance for H2/CO2 and H2/CO, with separation factors of 4.95 and 6.08, respectively, and a H2 permeance of 7.81 × 10−8 mol m−2 s−1 Pa−1 at 200 °C in the simulated biomass-derived syngas environments (H2/CO2/CO) with the presence of steam. In particular, the H2/CO2 and H2/CO separation factors were increased by 36% and 97%, respectively, with respect to those obtained through bare supports. Despite the promising H2 perm-selectivity, the H2/CO2 and H2/CO separation factors of ZIF-8 membranes at 200 °C under water-containing syngas environments were maintained up to 10 h but the longer exposure led to the gradual degradation and eventual reduction toward those of bare supports after 15 h seemingly due to the water-involved membrane degradation. This study provides the availability and limitation of ZIF-8 membranes for H2 separations in stimulated biomass-derived syngas environments.

Original languageEnglish
Pages (from-to)70-77
Number of pages8
JournalMicroporous and Mesoporous Materials
Volume233
DOIs
Publication statusPublished - 2016 Oct 1

Bibliographical note

Funding Information:
We are grateful for the NZ-Korea Joint Research Project funded by the Royal Society of New Zealand (KOR-UOC1101) . This work was also financially supported by the Korea CCS R&D Center (KCRC) ( 2014M1A8A1049309 ) and by Basic Science Research Program ( 2015R1A1A1A05027663 ) through National Research Foundation (NRF) of Korea. These two grants were funded by the Korea government (Ministry of Science, ICT & Future Planning). We also acknowledge the support from Dr. Tingxu Yang (University of Canterbury) regarding the membrane fabrication method. Thanks are also given to Dr. Aaron Marshall (University of Canterbury) for sharing his equipment with us.

Publisher Copyright:
© 2015 Elsevier Inc.

Keywords

  • Biomass-derived syngas
  • H separation
  • Hydrothermal stability
  • ZIF-8 membrane

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials

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