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Title: Next generation membranes —using tailored carbon

Abstract

Carbon molecular sieve (CMS) membranes are a special class of nanoporous membranes with angstrom-level molecular discrimination properties, which make them appealing for separating a wide spectrum of gas-pairs. The mechanism of pyrolysis by which a polymer coil is transformed into these rigid sieves is complex; however, we present a framework that can explain this transformation. Representative polymer precursors and pyrolysis conditions are discussed that yield attractive CMS membrane separation performance for extremely challenging gas pairs. Control of penetrant motions in the diffusion activated state, reflected in the entropy of activation of subtly different penetrants, enables the attractive diffusion selectivity of such membranes. This control, virtually absent even in rigid state-of-the-art polymeric membranes, makes CMS materials extraordinarily attractive. Furthermore, unlike other rigid sieving materials, CMS membranes have the added advantage of being processable into highly productive, flexible hollow fibers with good mechanical properties and long-term stability under constant gas feeds. Here, we also identify some key areas of CMS which would greatly benefit from expertise from other fields like computation or materials characterization that can potentially complement transport-based studies.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Georgia Institute of Technology, Atlanta, GA (United States)
Publication Date:
Research Org.:
Georgia Institute of Technology, Atlanta, GA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1594551
Alternate Identifier(s):
OSTI ID: 1576050
Grant/Contract Number:  
FG02-04ER15510
Resource Type:
Accepted Manuscript
Journal Name:
Carbon
Additional Journal Information:
Journal Volume: 127; Journal Issue: C; Journal ID: ISSN 0008-6223
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Sanyal, Oishi, Zhang, Chen, Wenz, Graham B., Fu, Shilu, Bhuwania, Nitesh, Xu, Liren, Rungta, Meha, and Koros, William J. Next generation membranes —using tailored carbon. United States: N. p., 2017. Web. doi:10.1016/j.carbon.2017.11.031.
Sanyal, Oishi, Zhang, Chen, Wenz, Graham B., Fu, Shilu, Bhuwania, Nitesh, Xu, Liren, Rungta, Meha, & Koros, William J. Next generation membranes —using tailored carbon. United States. https://doi.org/10.1016/j.carbon.2017.11.031
Sanyal, Oishi, Zhang, Chen, Wenz, Graham B., Fu, Shilu, Bhuwania, Nitesh, Xu, Liren, Rungta, Meha, and Koros, William J. Wed . "Next generation membranes —using tailored carbon". United States. https://doi.org/10.1016/j.carbon.2017.11.031. https://www.osti.gov/servlets/purl/1594551.
@article{osti_1594551,
title = {Next generation membranes —using tailored carbon},
author = {Sanyal, Oishi and Zhang, Chen and Wenz, Graham B. and Fu, Shilu and Bhuwania, Nitesh and Xu, Liren and Rungta, Meha and Koros, William J.},
abstractNote = {Carbon molecular sieve (CMS) membranes are a special class of nanoporous membranes with angstrom-level molecular discrimination properties, which make them appealing for separating a wide spectrum of gas-pairs. The mechanism of pyrolysis by which a polymer coil is transformed into these rigid sieves is complex; however, we present a framework that can explain this transformation. Representative polymer precursors and pyrolysis conditions are discussed that yield attractive CMS membrane separation performance for extremely challenging gas pairs. Control of penetrant motions in the diffusion activated state, reflected in the entropy of activation of subtly different penetrants, enables the attractive diffusion selectivity of such membranes. This control, virtually absent even in rigid state-of-the-art polymeric membranes, makes CMS materials extraordinarily attractive. Furthermore, unlike other rigid sieving materials, CMS membranes have the added advantage of being processable into highly productive, flexible hollow fibers with good mechanical properties and long-term stability under constant gas feeds. Here, we also identify some key areas of CMS which would greatly benefit from expertise from other fields like computation or materials characterization that can potentially complement transport-based studies.},
doi = {10.1016/j.carbon.2017.11.031},
journal = {Carbon},
number = C,
volume = 127,
place = {United States},
year = {2017},
month = {11}
}

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Cited by: 59 works
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