Synthesis and characterization of ZIF-69 membranes and separation for CO2/CO mixture

Yunyang Liu, Enping Hu, Easir A. Khan, Zhiping Lai

Research output: Contribution to journalArticlepeer-review

236 Scopus citations


Continuous and c-oriented ZIF-69 membranes were successfully synthesized on porous alpha-alumina substrates by an in situ solvothermal method. The membranes were characterized by XRD, SEM and single-gas permeation tests. The BET measurements on crystals taken from the same mother liquor that was used for membrane synthesis yield a Langmuir surface area of 1138 m(2)/g. The stability of the membrane towards heat and different solvents were studied. Single-gas permeation experiments through ZIF-69 membranes were carried out by a vacuum method at room temperature using H-2, CH4, CO, CO2 and SF6, respectively. The permeances were in the order of H-2 > CO2 > CH4 > CO > SF6. The separation of CO2/CO gas mixture was investigated by gas chromatograph (GC) and the permselectivity of CO2/CO was 3.5 +/- 0.1 with CO2 permeance of 3.6 +/- 0.3 x 10(-8) mol m(-2) s(-1) Pa-1 at room temperature. (C) 2010 Elsevier B.V. All rights reserved.
Original languageEnglish (US)
Pages (from-to)36-40
Number of pages5
JournalJournal of Membrane Science
Issue number1-2
StatePublished - May 1 2010
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We acknowledge the financial support from the startup fund (M58120001) provided by the College of Engineering of NTU, and the AcRF Tier 1 grant RG26/07. We thank Prof. Arvind and Mr. Wenda Chen for stability tests in sc-CO2.


Dive into the research topics of 'Synthesis and characterization of ZIF-69 membranes and separation for CO2/CO mixture'. Together they form a unique fingerprint.

Cite this