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Aspen Physical Property System - Physical Property Models

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Solvents<br />

The contribution from solvents can be written as follows:<br />

168 2 Thermodynamic <strong>Property</strong> <strong>Models</strong><br />

(103)<br />

(104)<br />

(105)<br />

(106)<br />

(107)<br />

(108)<br />

where is the liquid fugacity coefficient of pure solvent<br />

component i, pi sat is the vapor pressure of pure component at the system<br />

temperature T, �i v is the vapor fugacity coefficient of pure component at T<br />

and pi sat (normally calculated from an equation-of-state model), and<br />

is the Poynting pressure correction from pi sat to p,<br />

and Vi l is the liquid molar volume at T and p.<br />

Henry components<br />

The contribution from Henry components can be written as follows:<br />

(109)<br />

(110)<br />

(111)<br />

(112)<br />

(113)

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