High-Pressure Vapor-Liquid Equilibria of 1-Alkyl-1-Methylpyrrolidinium Bis(trifluoromethylsulfonyl)imide Ionic Liquids and CO 2
[1];
[2];
[3];
[3]
- Univ. of Kansas, Lawrence, KS (United States). Dept. of Chemical and Petroleum Engineering
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Univ. of Kansas, Lawrence, KS (United States). Dept. of Chemical and Petroleum Engineering, and Center for Environmentally Beneficial Catalysis
The high-pressure vapor-liquid equilibrium for the binary systems of carbon dioxide (CO2) and a series of 1-alkyl-1-methyl pyrrolidinium bis(trifluoromethylsulfonyl)amide ionic liquids ([CnC1pyr][NTf2] (n = 3,4,6)) are reported at 298.15, 318.15 and 338.15 K and at pressures up to 20 MPa. Experiments were conducted using gravimetric (IGA and XEMIS microbalances) and a volumetric method (high-pressure view cell). The solubility of CO2 in pyrrolidinium ionic liquids increases with decreasing temperature and increasing pressure. The CO2 solubility also slightly increases with increase in alkyl chain length on the pyrrolidinium cation. Molar volume and volume expansion of CO2 + IL mixtures are also reported. The Fickian diffusion of CO2 in pyrrolidinium based ionic liquids (~10-10 m2·s-1) was calculated at pressures of up to 2 MPa and found to be at the same order of magnitude but slightly lower than the diffusivity of CO2 in imidazolium based ionic liquid with the [NTf2] anion.
- Research Organization:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE Office of Nuclear Energy (NE)
- Grant/Contract Number:
- DE-AC07-05ID14517
- OSTI ID:
- 1567698
- Report Number(s):
- INL/JOU-18-52345-Rev001; TRN: US2001047
- Journal Information:
- Journal of Chemical and Engineering Data, Vol. -, Issue -; ISSN 0021-9568
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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