Title:
Analyzing Sorption Exclusion Effects for the CO2/CH4 Gas Pair Using Matrimid® CMS Dense Films
Analyzing Sorption Exclusion Effects for the CO2/CH4 Gas Pair Using Matrimid® CMS Dense Films
Author(s)
Vessel, Taylor C.
Advisor(s)
Koros , William J.
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Abstract
This thesis uses the so-called dual-mode sorption model to analyze Matrimid® polyimide-derived carbon molecular (CMS) thin films. This model provides a useful framework to analyze and understand sorption in complex CMS morphology. The model is also helpful to connect morphology to the pyrolysis process used to create it. The dual mode model includes coexisting continuous and dispersed Langmuir terms. The model parameters related to these environments are reported and discussed in this work.
CMS based membranes have been applied towards many different gas-pair separations. CMS thin films have appealing separation performance for key gas pairs; the carbon dioxide/methane pair, which is practically important, is the focus of this study. Previous measurements on CMS film sorption for this pair have been done. Surprisingly, applying the dual-mode sorption model to such thin films created from Matrimid® over a range of pyrolysis temperatures has not been done previously and is considered here. This thesis characterizes sorption properties of such CMS thin films for the CO2./CH4 pair and adds insights relevant to their separation. Suggestions for the next steps to extend this study are also provided.
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Date Issued
2023-07-31
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Text
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Thesis