The Glycol package (GLYCOL) uses the SRK-Modified-Panagiotopoulos-Reid (SRKM) method to calculate phase equilibria for glycol dehydration applications. A special set of parameters have been regressed for systems containing glycols, water and other components. The Glycol which may currently be considered is triethylene glycol (TEG).
In addition to the light paraffins found in natural gas, the package can handle H2, N2, O2, CO2, H2S, cycloparaffins and aromatic compounds.
Other thermodynamic properties which are calculated by the method include vapor and liquid enthalpies and entropies and vapor densities. The liquid density is computed with the API method.
See "Glycol Package (GLYCOL)" under "Special Packages" in Chapter 2, Volume 1, of the PRO/II Reference Manual for more information
Application Guidelines
The package is applicable to all TEG dehydration processes, including processes in which the gas contains aromatics (which dissolve in the glycol) or a high CO2 content.