Binary Interaction Parameters Window
A number of methods allow the entry of binary interaction parameters. These include Equations of State for many properties, liquid-activity-coefficient and polymer K-value methods. This window is used to select the equation form and enter the binary parameters.
Usage
From the Thermodynamic Data - Modification Window, push the Enter Data button by the property method for which property-specific data are to be accessed. From the Thermodynamic Property Modification Window, push the Enter Data button corresponding to Data Item "Binary Interactions".
Check the box to designate that you wish to enter values for the binary interaction parameters.
Some methods, such as NRTL and UNIQUAC, offer a number of different equation forms. Select the desired form from the choices in the Equation Format list box.
You may push the View Equation button to display the equation for your reference.
Select one of the following options from the Selection of Binary Data drop-down list to display the pertinent binary interaction data:
User Selected Pairs: It displays the binary interaction data only for the pair of components you select.
All Binary Pairs: It displays the binary interaction data for all the possible pairs of all the components.
Component: If you select a component (name of the component such as Methane, Ethane, and Propane) from the Selection of Binary Data drop-down list, the binary interaction data for all the possible pairs of that component with the other components is displayed.
In all cases, you must first designate the component pair for which you wish to enter the binary interaction parameters by selecting them from the list boxes which appear in the first two rows of the table. For polymer methods, interactions may be between components and/or polymer segments.
The number of rows which appear in the table, as well as which rows are required entries, depend on the property method.
For the many property methods, you may also select the Equation UOM from the drop-down list in the last row of the table. In all cases, the default for the Equation UOM is Kelvin.
Additional Options for Determining Parameters
If you do not have data for liquid activity interaction parameters, they may be determined from Azeotropic Data, Mutual Solubilities or from Infinity Solution Activity. Press the appropriate button in order to enter the data.
Methanol/Hydro Carbon Correlation
For SRK and PR Methods, select the box available to use this correlation:
Kij = 0.1 + 0.001*MW/14.0
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