466580 Gas Permeation Behaviors of Highly Permeable Thermally Rearranged (TR) Hollow Fiber Membranes in Flue Gas System

Thursday, November 17, 2016: 8:48 AM
Plaza B (Hilton San Francisco Union Square)
Jongmyeong Lee1, Hye Jin Jo1, Ju Sung Kim2, Jong Geun Seong1, Kyung Taek Woo2 and Young Moo Lee2, (1)Department of Energy Engineering, College of Engineering, Hanyang University, Seoul, Korea, The Republic of, (2)Department of Energy Engineering, Hanyang University, Seoul, Korea, The Republic of

In gas separation processes using membranes, for example CO2/N2 or O2/N2separation, membrane performance itself as represented by permeability (or permeance) and selectivity is important in deposal capacity and quality of resultant gas (purity). Particularly, process optimization achieved by controlling operation variations such as feed flow rate, stage-cut, pressure ratio, operation temperature, etc. plays a critical role influencing separation factor and overall operation cost in mixed gas separation system. In addition, the understanding of gas transport mechanism in presence of water vapor is essential in a process where water cannot be removed before it is in contact with membranes.

In this study, we fabricated highly permeable thermally rearranged polybenzoxazole (TR-PBO) hollow fiber membranes and their modules to examine gas permeation performance in mixed gas system similar to real flue gas exhausted from post-combustion process. The optimal operation condition for CO2 capture application was identified from simulation data. Additionally, we proposed a conceptual transport mechanism in TR-PBO hollow fiber membranes under humidified condition. Separation factor showed an increase with higher water vapor content without severe permeation flux drop. Moreover, the TR-PBO membrane modules under permeate vacuum condition showed improved gas separation performance with no permeation flux drop.

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See more of this Session: Membranes for Gas Separations III
See more of this Group/Topical: Separations Division