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A study of a novel membrane-based liquid-gas contactor /Wang, Shunyu, January 2005 (has links)
Thesis (M.Eng.)--Memorial University of Newfoundland, 2005. / Bibliography: leaves 92-93.
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Oxygen permeation properties of perovskite-related intergrowth oxides exhibiting mixed ionic-electronic conduction /Armstrong, Tad John, January 2000 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 158-164). Available also in a digital version from Dissertation Abstracts.
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Fundamentals of gas sorption and transport in thermally rearranged polyimidesSmith, Zachary Pace 27 August 2015 (has links)
Thermally rearranged polymers are formed from the solid-state thermal reaction of polyimides and polyamides that contain reactive groups ortho position to their diamine. These polymers have shown outstanding transport properties for gas separation applications. The thrust of this work is to critically examine the chemical and morphological structure of these polymers and to identify the fundamental contributions of gas sorption to permeability. To accomplish this goal, a series of TR polymers and TR polymer precursors have been synthesized and investigated for transport properties. As a function of conversion, diffusivity increases more dramatically than sorption, which explains the outstanding permeabilities observed for these samples. Modifications to the polymer backbone structure, which can be achieved by adding rigid functional groups such as hexafluoroisopropylidene-functional linking groups, can further be used to improve permeabilities. The precursor used to form TR polymers has dramatic effects on the final polymer transport properties. Despite having nearly identical polymer structure, TR polymers formed from polyamide precursors have lower combinations of permeability and selectivity than TR polymers formed from polyimide precursors. In addition to structure-property studies with TR polymers, this thesis also present comparisons of permeability, diffusivity, and sorption of sparingly soluble gases (i.e., hydrogen and helium) for hydrocarbon-based polymer, highly fluorinated polymers, perfluoropolymers, and a silicon-based polymer. An explanation for the unique transport properties of perfluoropolymers is presented from the standpoint of the solution-diffusion model, whereby perfluoropolymers have uniquely different solubility selectivities than hydrocarbon-based polymers. Additionally, a large database of sorption, diffusion, and permeability coefficients is used to determine the contributions of free volume on solubility selectivity in polymers. / text
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Low hydrocarbon solubility polymers: plasticization-resistant membranes for carbon dioxide removal from natural gasPrabhakar, Rajeev Satish 28 August 2008 (has links)
Not available / text
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Solubility selective membrane materials for carbon dioxide removal from mixtures with light gasesLin, Haiqing 28 August 2008 (has links)
Not available / text
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Membrane gas transfer of methane and carbon dioxide in submerged coal depositsCramer, Theodore A. January 2007 (has links)
Thesis (M.S.)--University of Wyoming, 2007. / Title from PDF title page (viewed on Feb. 24, 2009). Includes bibliographical references (p. 91-93).
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Coalescence-induced coalescence in polymeric membrane formation /Martula, David Stefan, January 2000 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 242-260). Available also in a digital version from Dissertation Abstracts.
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Formation and characterization of asymmetric polyimide hollow fiber membranes for gas separations /Clausi, Dominic Thomas, January 1998 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 186-197). Available also in a digital version from Dissertation Abstracts.
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Effect of bromine substitution, physical aging and crosslinking on the gas transport properties of polyarylates /McCaig, Michael Scott, January 1998 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 221-227). Available also in a digital version from Dissertation Abstracts.
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Carbon dioxide removal from natural gas by membranes in the presence of heavy hydrocarbons and by aqueous diglycolamine®/morpholineAl-Juaied, Mohammed Awad, Rochelle, Gary T. Koros, William J., January 2004 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2004. / Supervisors: Gary T. Rochelle and William J. Koros. Vita. Includes bibliographical references.
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