Correlation Between Pyrolysis Atmosphere and Carbon Molecular Sieve Membrane Performance Properties

Type
Book Chapter

Authors
Kiyono, Mayumi
Koros, William J.
Williams, Paul J.

KAUST Grant Number
KUS-I1-011-21

Date
2011

Abstract
Carbon molecular sieve (CMS) membranes have attractive separation performance properties, greatly exceeding an "upper bound" trade-off curve of polymeric membrane performance. CMS membranes are prepared by pyrolyzing polymers, well above their glass transition temperatures. Multiple factors, such as polymer precursor and pyrolysis protocol, are known to affect the separation performance. In this study, a correlation observed between pyrolysis atmosphere and CMS separation performance properties is discussed. Specifically, oxygen exposure during the pyrolysis process is the focus. The theory and details of the oxygen exposure and development of a new CMS preparation method using oxygen as a "dopant" will be described with a strong correlation observed with separation performance for CMS membranes prepared with various polymer precursors. In addition, study of possible mass transfer limitations on the oxygen "doping" process will be described to clarify the basis for the equilibrium-based interpretation of doping data. The method is also explored by changing the pyrolysis temperature. © 2011 Elsevier B.V.

Citation
Kiyono M, Koros WJ, Williams PJ (2011) Correlation Between Pyrolysis Atmosphere and Carbon Molecular Sieve Membrane Performance Properties. Membrane Science and Technology: 137–173. Available: http://dx.doi.org/10.1016/b978-0-444-53728-7.00007-0.

Acknowledgements
The authors gratefully acknowledge support for this work by Shell Global Solutions (US) Inc., and by award no. KUS-I1-011-21 made by King Abdullah University of Science and Technology (KAUST).

Publisher
Elsevier BV

Journal
Inorganic Polymeric and Composite Membranes - Structure, Function and Other Correlations

DOI
10.1016/b978-0-444-53728-7.00007-0

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