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Erschienen in:
2020 | OriginalPaper | Buchkapitel
81. CO2 Capture from Natural Gas with Ionic Liquid
verfasst von : Nesrine Amiri, Zoubida Lounis, Hassiba Benyounes
Erschienen in: ICREEC 2019
Verlag: Springer Singapore
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Abstract
Carbon dioxide capture is a global concern because of its effect on climate change, especially as regards to global warming. Absorption using physical and chemical solvents is the commonly used method to capture CO2. Ionic liquids (ILs) as advanced solvents have been regarded as appropriate candidates for CO2 capture because of their advantages such as non-volatility potentially that makes ILs “green” solvents, negligible vapor pressure and high CO2 solubility.
This work aimed to study the feasibility of CO2 separation from a gas containing methane using the low viscosity ionic liquid 1-hexyl-3-methylimidazolium tetracyanoborate [hmim][TCB] as an alternative to conventional ones by simulation using Aspen plus V.8.0. Thermophysical properties were calculated using empirical correlations, and the experimental data for CO2/CH4 in presence of [hmim][TCB] were fitted with the NRTL activity coefficient model to determine the binary interaction parameters. The results show that lower solvent flow rate and lower energy consumption are required for the absorption with [hmim][TCB] than with organic solvents, especially for gas streams with moderate acid gas content.