Investigations of thermophysical properties of ionic liquids used for carbon capture
File(s)
Author(s)
Huang, Shaochen
Type
Thesis
Abstract
In recent years, Carbon Capture and Storage (CCS) has been proposed as a potential method to allow the continued use of fossil-fuelled power stations whilst preventing emissions of CO2 from reaching the atmosphere. Currently, CO2 capture is dominated by amine-based (e.g., monoethanolamine) technologies, which are very energy intensive and less attractive from an environmental point of view due to emissions of the used volatile solvent components. Ionic liquids have been proposed as a promising alternative to the conventional volatile solvents, because of their low volatility, wide liquid range, high thermal stabilities and tunable properties. This remarkable interest has led to a rapid growth of literature on this specific subject.
The work in this thesis can be divided into two main areas: the first part is about the thermophysical properties of ionic liquids, including density, viscosity and thermal stability, for both conventional room-temperature ionic liquids and novel synthesized amine-functionalized ionic liquids. The second part of research is focus on the CO2 uptake ability of synthesized ionic liquids, including the comparison of the amine-functionalized ionic liquids to conventional ionic liquids, and more detailed study on the best performing ionic liquid, 1-ethylamine -3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2NH2C1im][NTf2]), including the temperature effect, pressure effect and performance after absorption/desorption cycles. In addition, donor number value is gathered for five ionic liquids to provide more information on predicting CO2 absorption performance.
The work in this thesis can be divided into two main areas: the first part is about the thermophysical properties of ionic liquids, including density, viscosity and thermal stability, for both conventional room-temperature ionic liquids and novel synthesized amine-functionalized ionic liquids. The second part of research is focus on the CO2 uptake ability of synthesized ionic liquids, including the comparison of the amine-functionalized ionic liquids to conventional ionic liquids, and more detailed study on the best performing ionic liquid, 1-ethylamine -3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2NH2C1im][NTf2]), including the temperature effect, pressure effect and performance after absorption/desorption cycles. In addition, donor number value is gathered for five ionic liquids to provide more information on predicting CO2 absorption performance.
Version
Open Access
Date Issued
2018-04
Date Awarded
2019-09
Copyright Statement
Creative Commons Attribution NonCommercial NoDerivatives Licence
Advisor
Hallett, Jason
Trusler, Martin
Publisher Department
Chemical Engineering
Publisher Institution
Imperial College London
Qualification Level
Doctoral
Qualification Name
Doctor of Philosophy (PhD)