Structure-property reduced order model for viscosity prediction in single-component CO2-binding organic liquidsElectronic supplementary information (ESI) available. See DOI: 10.1039/c6gc02203k
CO 2 capture from power generation with aqueous solvents remains energy intensive due to the high water content of the current technology, or the high viscosity of non-aqueous alternatives. Quantitative reduced models, connecting molecular structure to bulk properties, are key for developing structu...
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Format | Journal Article |
Language | English |
Published |
07.11.2016
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Abstract | CO
2
capture from power generation with aqueous solvents remains energy intensive due to the high water content of the current technology, or the high viscosity of non-aqueous alternatives. Quantitative reduced models, connecting molecular structure to bulk properties, are key for developing structure-property relationships that enable molecular design. In this work, we describe such a model that quantitatively predicts viscosities of CO
2
binding organic liquids (CO
2
BOLs) based solely on molecular structure and the amount of bound CO
2
. The functional form of the model correlates the viscosity with the CO
2
loading and an electrostatic term describing the charge distribution between the CO
2
-bearing functional group and the proton-receiving amine. Molecular simulations identify the proton shuttle between these groups within the same molecule to be the critical indicator of low viscosity. The model, developed to allow for quick screening of solvent libraries, paves the way towards the rational design of low viscosity water-lean solvent systems for post-combustion CO
2
capture. Following these theoretical recommendations, synthetic efforts of promising candidates and viscosity measurement provide experimental validation and verification.
A reduced model connecting molecular structure to viscosity for single-component carbon capture solvents is presented. |
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AbstractList | CO
2
capture from power generation with aqueous solvents remains energy intensive due to the high water content of the current technology, or the high viscosity of non-aqueous alternatives. Quantitative reduced models, connecting molecular structure to bulk properties, are key for developing structure-property relationships that enable molecular design. In this work, we describe such a model that quantitatively predicts viscosities of CO
2
binding organic liquids (CO
2
BOLs) based solely on molecular structure and the amount of bound CO
2
. The functional form of the model correlates the viscosity with the CO
2
loading and an electrostatic term describing the charge distribution between the CO
2
-bearing functional group and the proton-receiving amine. Molecular simulations identify the proton shuttle between these groups within the same molecule to be the critical indicator of low viscosity. The model, developed to allow for quick screening of solvent libraries, paves the way towards the rational design of low viscosity water-lean solvent systems for post-combustion CO
2
capture. Following these theoretical recommendations, synthetic efforts of promising candidates and viscosity measurement provide experimental validation and verification.
A reduced model connecting molecular structure to viscosity for single-component carbon capture solvents is presented. |
Author | Heldebrant, David J Malhotra, Deepika Koech, Phillip K Rousseau, Roger Glezakou, Vassiliki-Alexandra Freeman, Charles J Cantu, David C Zheng, Feng (Richard) |
AuthorAffiliation | Physical Sciences Division Energy Processes and Materials Division Pacific Northwest National Laboratory |
AuthorAffiliation_xml | – name: Energy Processes and Materials Division – name: Pacific Northwest National Laboratory – name: Physical Sciences Division |
Author_xml | – sequence: 1 givenname: David C surname: Cantu fullname: Cantu, David C – sequence: 2 givenname: Deepika surname: Malhotra fullname: Malhotra, Deepika – sequence: 3 givenname: Phillip K surname: Koech fullname: Koech, Phillip K – sequence: 4 givenname: David J surname: Heldebrant fullname: Heldebrant, David J – sequence: 5 givenname: Feng (Richard) surname: Zheng fullname: Zheng, Feng (Richard) – sequence: 6 givenname: Charles J surname: Freeman fullname: Freeman, Charles J – sequence: 7 givenname: Roger surname: Rousseau fullname: Rousseau, Roger – sequence: 8 givenname: Vassiliki-Alexandra surname: Glezakou fullname: Glezakou, Vassiliki-Alexandra |
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Snippet | CO
2
capture from power generation with aqueous solvents remains energy intensive due to the high water content of the current technology, or the high... |
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Title | Structure-property reduced order model for viscosity prediction in single-component CO2-binding organic liquidsElectronic supplementary information (ESI) available. See DOI: 10.1039/c6gc02203k |
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