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

被引：23

作者：

Seong, Jong Geun ^{[1
]}

Lewis, Jeremy C. ^{[1
]}

Matteson, John A. ^{[1
]}

Craddock, Erica ^{[1
]}

Martinez, Ulises ^{[1
]}

Thakkar, Harshul ^{[1
]}

Benavidez, Angelica D. ^{[2
,3
]}

Berchtold, Kathryn A. ^{[1
]}

Singh, Rajinder P. ^{[1
]}

机构：

[1] Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA

[2] Univ New Mexico, Dept Chem & Biol Engn, Albuquerque, NM 87131 USA

[3] Univ New Mexico, Ctr Microengineered Mat, Albuquerque, NM 87131 USA

来源：

CARBON | 2022年 / 192卷

关键词：

Carbon molecular sieve (CMS) membrane; Hollow fiber membrane (HFM); Polybenzimidazole (PBI); Oxygen enrichment; Gas separation; GAS SEPARATION PERFORMANCE; ENRICHED AIR; POLYIMIDE; PARAMETERS; POLYMER; OPTIMIZATION; TEMPERATURE; EVOLUTION; SORPTION;

D O I：

10.1016/j.carbon.2022.02.033

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 H-2/CO2), further development of CMS membranes having high O-2/N-2 perm-selectivity for energy-efficient high-purity O-2 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 O-2/N-2 separation performance for the first time. The micro-structural and O-2 selective gas separation characteristics of PBI-CMS HFMs pyrolyzed at different pyrolysis conditions were intensively studied. With rigorous carbonization protocol optimization, we obtained highly O-2 permselective PBI-CMS HFMs having O-2/N-2 selectivities approaching 14, enabling high purity O-2 production. The PBI-CMS HFM O-2/N-2 separation performance dependence on operating conditions (e.g. temperature and feed pressure) are reported. (C) 2022 Elsevier Ltd. All rights reserved.

引用

页码：71 / 83

页数：13

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