Interfacial Tension and Related Properties of Ionic Liquids in CH4 and CO2 at Elevated Pressures: Experimental Data and Molecular Dynamics Simulation
| Autor: | Thorsten Köddermann, Dirk Reith, Martin R. Schenk, P. Jaeger, Sandra Knauer |
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| Rok vydání: | 2017 |
| Předmět: |
Chemistry
General Chemical Engineering Multiphase flow Liquid phase Thermodynamics 02 engineering and technology General Chemistry 010402 general chemistry 01 natural sciences 0104 chemical sciences Whole systems Surface tension Molecular dynamics chemistry.chemical_compound 020401 chemical engineering Phase (matter) Ionic liquid Physical chemistry 0204 chemical engineering Dissolution |
| Zdroj: | Journal of Chemical & Engineering Data. 62:2234-2243 |
| ISSN: | 1520-5134 0021-9568 |
| DOI: | 10.1021/acs.jced.6b00751 |
| Popis: | Experimental data on the interfacial tension of ionic liquids in CO2 and CH4 atmospheres at elevated pressures (up to 20 MPa and 353 K) are presented and discussed. In addition, molecular modeling is utilized to describe the thermophysical properties under process-relevant conditions. Molecular modeling has the potential to predict findings in order to avoid costly experiments in the future and to explain the principal behavior of the whole system in terms of simulated concentration profiles. The interfacial tension is recognized to be an important quantity in a number of processes, e.g., for describing multiphase flow. By dissolving within the liquid phase, gases reduce the interfacial tension, which in turn is closely related to the phase behavior. It is shown that the experimentally determined interfacial tension, which decreases from values of 50 mN·m–1 under atmospheric conditions down to 10 mN·m–1 in CO2 but still above 30 mN·m–1 in CH4 at 10 MPa, is appropriately reflected by molecular dynamics (MD... |
| Databáze: | OpenAIRE |
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