A multi-fluid nonrandom lattice fluid model: General derivation and application to pure fluids |
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Authors: | Moon Sam Shin Ki-Pung Yoo Chul Soo Lee Hwayong Kim |
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Affiliation: | (1) School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, 151-744 Seoul, Korea;(2) Department of Chemical and Biomolecular Engineering, Sogang University, 121-742 Seoul, Korea;(3) Department of Chemical and Biological Engineering, Korea University, 136-701 Seoul, Korea |
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Abstract: | A multi-fluid nonrandom lattice fluid model with no temperature dependence of close packed volumes of a mer, segment numbers
and energy parameters of pure systems is presented. The multi-fluid nonrandom lattice fluid (MF-NLF) model with the local
composition concept was capable of describing properties for complex systems. However, the MF-NLF model has strong temperature
dependence of energy parameters and segment numbers of pure systems; thus empirical correlations as functions of temperature
were represented for reliable and convenient use in engineering practices. The MF-NLF model without temperature dependence
of pure parameters could not predict thermodynamic properties accurately. It was found that the present model with three parameters
describes quantitatively the vapor pressure and the saturated density for the pure fluid. |
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Keywords: | Multi-fluid Nonrandom Lattice Local Composition Equation of State |
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