High-pressure apparatus for monitoring solid–liquid phase transitions
| Autor: | Gregory W. Coffey, Olga A. Marina, Alejandro Heredia-Langner, Mary Jane Coffey, Edwin C. Thomsen, J. Timothy Bays, Kristen B. Campbell, Margaret C. Jones, John C. Linehan |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Phase transition Materials science Atmospheric pressure Cyclohexane Thermodynamics Fraction (chemistry) Fuel injection 01 natural sciences 010305 fluids & plasmas law.invention Diesel fuel chemistry.chemical_compound chemistry law Phase (matter) 0103 physical sciences Crystallization Instrumentation |
| Zdroj: | Review of Scientific Instruments. 91:094102 |
| ISSN: | 1089-7623 0034-6748 |
| Popis: | This work presents a new technique for evaluating the solid-liquid phase transformations in complex diesel fuel blends and diesel surrogates under high-pressure conditions intended to simulate those occurring in vehicle fuel injectors. A high-pressure apparatus based on a visual identification of freezing and thawing has been designed and built to monitor phase behavior and determine the crystallization temperature of complex fuels to predict wax precipitation. The proposed methodology was validated using pure substances-n-hexadecane (C16H34), cyclohexane (C6H12), and a mixture of 0.5848 mol fraction n-hexadecane in cyclohexane. The crystallization temperatures of these compounds were measured from atmospheric pressure to 400 MPa for temperatures varying from 290 K to 363 K and compared to those reported in the literature. The standard error of the estimated temperatures for the experimental data obtained in this work, based on a given pressure, was compared to data from the literature. This methodology will be extended to investigate the properties of more complex fuel mixtures. |
| Databáze: | OpenAIRE |
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