Phase equilibria of long chain n-alkanes in supercritical ethane: Review,measurements and prediction |
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| Affiliation: | 1. Aalborg University Esbjerg, Faculty of Science and Technology, Department of Chemistry and Bioscience, Niels Bohrs Vej 8, 6700 Esbjerg, Denmark;2. Solvay Specialty Polymers, R&D Center, Viale Lombardia 20, 20021 Bollate, Milan, Italy;1. INTA – Instituto Nacional de Técnica Aeroespacial, Madrid, Spain;2. ENAGÁS, S.A., Zaragoza, Spain;3. INRiM – Istituto Nazionale di Ricerca Metrologica, Torino, Italy;4. E+E – E+E Elektronik, Engerwitzdorf, Austria;5. NPL – National Physical Laboratory, Teddington, United Kingdom;6. UKAS – United Kingdom Accreditation Service, Feltham, United Kingdom;7. PTB – Physikalisch-Technische Bundesanstalt, Braunschweig, Germany;8. MIKES – Mittatekniikan Keskus, Espoo, Finland;9. VSL – Van Swinden Laboratory, Delft, Netherlands;10. SMU – Slovenský Metrologický Ustav, Bratislava, Slovakia;1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;2. School of Mechanical and Automotive Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China;1. Department of Industrial Engineering, Universidad de Talca, Merced 437, 3341717 Curicó, Chile;2. IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain |
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| Abstract: | The available sets of data for the phase equilibrium of long chain n-alkanes with 10 or more carbon atoms in supercritical ethane were studied to determine if the phase equilibrium pressure can be predicted from the number of carbon atoms and system temperature. It has previously been shown that for the phase equilibria of heavy n-alkanes in supercritical propane there exists, at constant temperature and mass fraction, a linear relationship between the number of carbon atoms and the bubble/dew point pressure. Published data in the temperature range 310–360 K was obtained from a literature survey and, where required, additional data was measured using a high-pressure equilibrium cell. It was found that linear relationships exist and that these relationships can be used to predict the phase equilibrium pressure within 4% of experimental values. |
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