Polybenzimidazole-derived carbon molecular sieve hollow fiber membranes with tailored oxygen selective transport

Seong, JongGeun; Lewis, Jeremy Charles; Thakkar, Harshul Vipul; Matteson, John Anthony; Berchtold, Kathryn A.; Martinez, Ulises; Benavidez, Angelica D.; Singh, Rajinder Pal

doi:10.1016/j.carbon.2022.02.033

Title: Polybenzimidazole-derived carbon molecular sieve hollow fiber membranes with tailored oxygen selective transport

Journal Article · Thu Feb 17 00:00:00 EST 2022 · Carbon

DOI:https://doi.org/10.1016/j.carbon.2022.02.033· OSTI ID:1846923

^[1]; Lewis, Jeremy Charles ^[1];

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of New Mexico, Albuquerque, NM (United States). Center for Microengineered Materials

Polymer membrane carbonization is a promising strategy to obtain carbon molecular sieve (CMS) membrane materials with tailorable cavity size distributions for high gas selectivities beyond that attained from traditional polymer membrane materials. Despite their already demonstrated exceptional separation performance characteristics for several gas separation applications (e.g. CO₂/CH₄ and H₂/CO₂), further development of CMS membranes having high O₂/N₂ perm-selectivity for energy-efficient high-purity O₂ production has proven challenging. Herein, we explore CMS hollow fiber membranes (HFMs) derived from highly rigid and tightly-packed polybenzimidazole (PBI) materials. Nearly defect-free PBI-derived CMS HFMs were fabricated and evaluated for O₂/N₂ separation performance for the first time. The micro-structural and O₂ selective gas separation characteristics of PBI-CMS HFMs pyrolyzed at different pyrolysis conditions were intensively studied. With rigorous carbonization protocol optimization, we obtained highly O₂ permselective PBI-CMS HFMs having O₂/N₂ selectivities approaching 14, enabling high purity O₂ production. The PBI-CMS HFM O₂/N₂ separation performance dependence on operating conditions (e.g. temperature and feed pressure) are reported.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Fossil Energy and Carbon Management (FECM)

Grant/Contract Number:: 89233218CNA000001; FE-1049-18-FY19

OSTI ID:: 1846923

Alternate ID(s):: OSTI ID: 1960657

Report Number(s):: LA-UR-22-21415

Journal Information:: Carbon, Vol. 192; ISSN 0008-6223

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
Carbon molecular sieve membrane
hollow fiber membrane
polybenzimidazole
oxygen enrichment
gas separation

Title: Polybenzimidazole-derived carbon molecular sieve hollow fiber membranes with tailored oxygen selective transport

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