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Lee JS, Lively RP, Huang D, Hillesheim PC, Dai S, Koros WJ. A new approach of ionic liquid containing polymer sorbents for post-combustion CO2 scrubbing. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Abstract
We present here the creation of a defect-free polyvinylidene chloride barrier layer on the lumen-side of a hollow fiber sorbent. Hollow fiber sorbents have previously been shown to be promising materials for enabling low-cost CO(2) capture, provided a defect-free lumen-side barrier layer can be created. Film experiments examined the effect of drying rate, latex age, substrate porosity (porous vs nonporous), and substrate hydrophobicity/hydrophilicity. Film studies show that in ideal conditions (i.e., slow drying, fresh latex, and smooth nonporous substrate), a defect-free film can be formed, whereas the other permutations of the variables investigated led to defective films. These results were extended to hollow fiber sorbents, and despite using fresh latex and relatively slow drying conditions, a defective lumen-side layer resulted. XRD and DSC indicate that polyvinylidene chloride latex develops crystallinity over time, thereby inhibiting proper film formation as confirmed by SEM and gas permeation. This and other key additional challenges associated with the porous hollow fiber substrate vs the nonporous flat substrate were overcome. By employing a toluene-vapor saturated drying gas (a swelling solvent for polyvinylidene chloride) a defect-free lumen-side barrier layer was created, as investigated by gas and water vapor permeation.
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Affiliation(s)
- Ryan P Lively
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive NW, Atlanta, Georgia 30332-0100, United States.
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Lively RP, Dose ME, Thompson JA, McCool BA, Chance RR, Koros WJ. Ethanol and water adsorption in methanol-derived ZIF-71. Chem Commun (Camb) 2011; 47:8667-9. [DOI: 10.1039/c1cc12728d] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Affiliation(s)
- Ryan P. Lively
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100
| | - Ronald R. Chance
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100
| | - William J. Koros
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100
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105
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Affiliation(s)
- Ryan P. Lively
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100, ExxonMobil Upstream Research Company, Houston, TX, and ExxonMobil Research and Engineering, Annandale, NJ
| | - Ronald R. Chance
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100, ExxonMobil Upstream Research Company, Houston, TX, and ExxonMobil Research and Engineering, Annandale, NJ
| | - B. T. Kelley
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100, ExxonMobil Upstream Research Company, Houston, TX, and ExxonMobil Research and Engineering, Annandale, NJ
| | - Harry W. Deckman
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100, ExxonMobil Upstream Research Company, Houston, TX, and ExxonMobil Research and Engineering, Annandale, NJ
| | - Jeffery H. Drese
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100, ExxonMobil Upstream Research Company, Houston, TX, and ExxonMobil Research and Engineering, Annandale, NJ
| | - Christopher W. Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100, ExxonMobil Upstream Research Company, Houston, TX, and ExxonMobil Research and Engineering, Annandale, NJ
| | - William J. Koros
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 778 Atlantic Drive, Atlanta, Georgia 30332-0100, ExxonMobil Upstream Research Company, Houston, TX, and ExxonMobil Research and Engineering, Annandale, NJ
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Abstract
Sandwich and T-shaped configurations of substituted benzene dimers were studied by second-order perturbation theory to determine how substituents tune pi-pi interactions. Remarkably, multiple substituents have an additive effect on the binding energy of sandwich dimers, except in some cases when substituents are aligned on top of each other. The energetics of substituted T-shaped configurations are more complex, but nevertheless a simple model that accounts for electrostatic and dispersion interactions (and direct contacts between substituents on one ring and hydrogen atoms on the other), provides a good match to the quantum mechanical results. These results provide insight into the manner by which substituents csan be utilized in supramolecular design.
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Affiliation(s)
- Ashley L Ringer
- Center for Computational Molecular Science and Technology, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, 30332-0400, USA
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