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High-temperature solubility and thermodynamic correlation of CO2, H2, and CH4 in 1-Ethyl-2-pyrrolidone: Implications for catalytic CO2 hydrogenation to ethanol
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DOI：10.1016/j.fluid.2026.114706.png)
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Abstract
En 中文
The solubilities of CO2, H-2, and CH4 in 1-ethyl-2-pyrrolidone (NEP) were measured using the isochoric saturation method at 413.15-453.15 K under pressures of 0.45-3.89 MPa (CO2), 4.42-7.64 MPa (H-2), and 0.59-3.49 MPa (CH4). The reliability of the apparatus was verified by measuring CO2 solubility in N-methyl-2-pyrrolidone (NMP) at 323.15-353.15 K. The solubility order in NEP was found to be CO2 > CH4> H-2. Temperaturedependent Henry's constants were obtained, and the experimental data were correlated using the Krichevsky-Kasarnovsky equation and the generic Redlich-Kwong (RK) cubic equation of state, with the RK model providing better accuracy. These results offer essential thermodynamic data for describing gas-liquid equilibrium in NEP and support solvent selection and process design in high-temperature CO2 conversion systems.
Keywords:
Carbon dioxide
Hydrogen
Methane
Solubility
1-Ethyl-2-pyrrolidone
Modeling
Journal
IF:
2.7
Papers:
339
Citations:
1.5W
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