Method for providing robustness to the solution of the cubic equation of state
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United States of America Patent
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Mar 25, 2008
Grant Date -
Jan 13, 2005
app pub date -
Jul 8, 2003
filing date -
Jul 8, 2003
priority date (Note) -
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Abstract
The cubic equations of state (CEOS) relate pressure, temperature and molar volume of a mixture. The deviation of the physical properties of a mixture from ideality is expressed by the compressibility factor. The compressibility factor is calculated from the CEOS. There is described a solution to the CEOS which provides a continuous solution for compressibility factors over the entire range of operating conditions. This solution avoids the non-unique roots, trivial roots and singularities that are present in the prior art solutions of the CEOS.
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