Phase compositions and saturated densities for the binary systems of carbon dioxide with ethanol and dichloromethane |
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| Institution: | 1. Environmental Remediation Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, Japan;2. International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, Japan;3. Surface Physics and Structure Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, Japan;4. Global Research Center for Environment and Energy based on Nanomaterials Science, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, Japan;5. Graduate School of Pure and Applied Sciences, University of Tsukuba, 3-13 Sakura, Tsukuba, Ibaraki, Japan;6. TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, PR China;1. Aix Marseille Univ, CNRS, Centrale Marseille, M2P2, Marseille, France;2. Polymers & Composites, Council for Scientific & Industrial Research (CSIR), PO Box 395, Pretoria, South Africa |
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| Abstract: | The compositions and densities of the liquid and vapor phases of two binary systems at equilibrium were measured on a new experimental apparatus over a range of temperatures and pressures. The studied systems are: CO2–ethanol at 313.2 and 328.2 K; CO2–dichloromethane at 308.2, 318.2 and 328.2 K and for pressures ranging from ambient up to ca. 9 MPa. Some of our measurements are critically compared with corresponding literature values. These measurements are ideally suited for testing equation-of-state models. The recently developed quasi-chemical hydrogen-bonding (QCHB) model was used for correlating the experimental data. A satisfactory agreement was obtained between experimental and calculated phase compositions and saturated densities. |
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