Polycrystalline metal-organic framework (MOF) membranes for molecular separations: Engineering prospects and challenges

• Published in: Journal of membrane science Vol. 640; p. 119802
• Main Authors: Abdul Hamid, Mohamad Rezi, Qian, Yutian, Wei, Ruicong, Li, Zhen, Pan, Yichang, Lai, Zhiping, Jeong, Hae-Kwon
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2021
• Subjects: carbon; coordination polymers; cost effectiveness; Engineering challenges; Gas separations; hydrogen; Metal-organic frameworks; Polycrystalline membranes; research and development; Zeolitic-imidazolate frameworks; Gas separations; Zeolitic-imidazolate frameworks; Polycrystalline membranes; Metal-organic frameworks; Engineering challenges
• ISSN: 0376-7388; 1873-3123
• DOI: 10.1016/j.memsci.2021.119802

Metal-organic frameworks (MOFs), owing to their ordered porous structure, ease of synthesis, and versatility of surface functionalization have attracted significant research interests for membrane-based separations. Zeolitic-imidazolate frameworks (ZIFs), a subclass of MOFs, have drawn the most research attention by virtue of their ease of forming high-quality membranes and potential in hydrocarbon mixture separations. Other MOF-based membranes such as IRMOFs, HKUST-1, MILs, UiOs, etc., were also well-studied for hydrogen purification and carbon capture. In this review, we summarize a chronological development of MOF membranes for gas separations, focusing on ZIF-8 membranes for C3H6/C3H8 separation. Other MOF membranes for H2/CO2, CO2/CH4, and CO2/N2 separations are also reviewed. Following this, we provide a thorough assessment and evaluation of the engineering challenges, including cost-effectiveness, module design, and membrane stability and reproducibility for industrial scale-up. Finally, we provide our point of view on future research and development in the area. [Display omitted] •Chronological development of MOF membranes for gas separations was reviewed.•MOF membrane separations are based on kinetic and thermodynamic effects.•Hybrid MOF approaches enable tuning of MOF transport properties.•Post-synthetic modifications are effective to improve membrane performances.•Transitioning MOF membranes from laboratory to industry is not trivial.