Influence of non-solvent chemistry on polybenzimidazole hollow fiber membrane preparation

Journal Article · Sat Feb 02 00:00:00 EST 2019 · Journal of Membrane Science

DOI:https://doi.org/10.1016/j.memsci.2019.02.001· OSTI ID:1494478

Dahe, Ganpat J. ^[1]; Singh, Rajinder Pal ^[1]; Dudeck, Kevin Wade ^[1]; Yang, Dali ^[1]; Berchtold, Kathryn A. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Polybenzimidazole membrane materials have attractive H₂/CO₂ separation characteristics and high thermo-chemical stability for elevated temperature synthesis (syn) gas separations. The development of PBI membranes with a thin defect-free selective layer and porous support morphology is vital to achieving industrially attractive separation performance. This work is focused on developing a fundamental understanding of the liquid-liquid demixing-based phase inversion process for asymmetric PBI hollow fiber membrane (HFM) formation. The development of industrially attractive HFMs is a challenging process due to the complex interplay between phase equilibria, phase inversion kinetics, and interfacial mass transfer that exist during the liquid-liquid demixing process. Numerous parameters including the dope, bore, and outer coagulant chemistries and compositions significantly influence the HFM morphologies produced. Here, a systematic study is conducted to investigate the phase inversion process parameters including the roles of the non-solvent solubility and diffusivity parameters with respect to the solvent and PBI on the phase inversion process. Furthermore, the influence of dope, bore and coagulant chemistries and compositions on PBI HFM morphology are investigated. As a result, the fabricated PBI HFMs are evaluated for their ideal H₂ and CO₂ permeance and H₂/CO₂ selectivity at 250 °C to benchmark their separation performance.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Fossil Energy (FE), Clean Coal and Carbon (FE-20)
• Grant/Contract Number: 89233218CNA000001
• OSTI ID: 1494478
• Alternate ID(s): OSTI ID: 2325493
• Report Number(s): LA-UR-18-27898
• Journal Information: Journal of Membrane Science, Journal Name: Journal of Membrane Science Journal Issue: C Vol. 577; ISSN 0376-7388
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

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