Synthesis and High Pressure Gas Separation Properties of Thin Metal-Organic Framework Membranes Jerry Y.S. Lin, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ 85287 MOF-5 Membranes: Defect-free, high quality, thin MOF-5 membranes are be prepared by the secondary growth method. The membrane shows desired crystal structure and good mechanical integrity. The absence of the intercrytalline defects is confirmed by the molecular probing method.
MOF-5
MOF-5 membrane
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*
*
MOF-5 powder -Al2O3 support
5
10
15
20
25
30
35
40
2 degree -6
80
10
CO2 (v%) = 88.01%
60
feed flow rate = 50mL/min -7
10
40 CO2 N2
20
-8
10
0 150
200
250
300
Feed pressure (kPa)
350
400
450
Separation factor
2
Permeance (mol/Pa.s.m )
The MOF-5 membranes are perm-selective for carbon dioxide over nitrogen due to preferential adsorption of carbon dioxide over nitrogen. The selectivity increases with feed pressure – a previously unobserve phenomenon, but highly desirable for separation applications
* -Al2O3
