Equilibria and correlation of systems involving 1-hexyl-3-methylpyridinium trifluoromethanesulfonate
| Autor: | Ana Soto, Antonio Marcilla, Raquel Corchero, Maria del Mar Olaya, Paloma Carbonell-Hermida |
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| Přispěvatelé: | Universidade de Santiago de Compostela. Departamento de Enxeñaría Química, Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS), Universidad de Alicante. Departamento de Ingeniería Química, Universidad de Alicante. Instituto Universitario de Ingeniería de los Procesos Químicos, Procesado y Pirólisis de Polímeros |
| Rok vydání: | 2019 |
| Předmět: |
Work (thermodynamics)
Materials science Chemical substance General Chemical Engineering Thermodynamics 02 engineering and technology 010402 general chemistry 01 natural sciences Physics::Fluid Dynamics chemistry.chemical_compound 1-hexyl-3-methylpyridinium trifluoromethanesulfonate Non-random two-liquid model Equilibria Alkyl Phase diagram Octane chemistry.chemical_classification General Chemistry 021001 nanoscience & nanotechnology Correlation Ionic liquids 0104 chemical sciences Ingeniería Química chemistry Ionic liquid 0210 nano-technology Ternary operation |
| Zdroj: | Minerva: Repositorio Institucional de la Universidad de Santiago de Compostela Universidad de Santiago de Compostela (USC) Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela instname RUA. Repositorio Institucional de la Universidad de Alicante Universidad de Alicante (UA) |
| Popis: | Ionic liquids are being proposed for the improvement of many refinery-related applications where water and oil coexist. However, the lack of relevant thermodynamic data on equilibrium processes involving water, oil and an ionic liquid is a stumbling block. Phase diagrams of these systems are complex, with many different regions, especially when the ionic liquid is solid at room conditions. This greatly complicates modelling, which is usually neglected or carried out only partially. In this work, for the first time, the simultaneous correlation not only of liquid–liquid and liquid–liquid–liquid but also solid–liquid equilibrium data for ternary systems involving ionic liquids has been carried out. To that end, the ionic liquid 1-hexyl-3-methylpyridinium trifluoromethanesulfonate, with an alkyl chain length that favours nano-segregation, was selected. Phase diagrams with water and different representative oils (octane, toluene and cyclohexane) have been determined at various temperatures and atmospheric pressure. The great capacity of the NRTL model, a powerful tool used in all chemical process simulators, was shown by simultaneously correlating data from all the equilibrium regions. However, adequate equilibrium equations and pivotal strategies were required. Low deviations and a good representation of phase diagrams was achieved. A topological analysis based on the Gibbs common tangent criterion and a stability test allowed validation of the proposed correlation parameters The authors acknowledge the Ministry of Science, Innovation and Universities (Spain) for financial support throughout project PGC2018-097342-B-I00 (including European Regional Development Fund advanced funding) SI |
| Databáze: | OpenAIRE |
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