This keyword data block is
used to define the binary interaction coefficients of gas components for
Peng-Robinson gases.
Line 0: GAS_BINARY_PARAMETERS
Line 1a: H2O(g) CO2(g) 0.19
Line 1b: H2O(g) H2S(g) 0.19
Line 1c: H2O(g) H2Sg(g) 0.19Line 1d: H2O(g) CH4(g) 0.49Line 1e: H2O(g) Mtg(g) 0.49Line 1f: H2O(g) Methane(g) 0.49Line 1g: H2O(g) N2(g) 0.49Line 1h: H2O(g) Ntg(g) 0.49Line 1i: H2O(g) Ethane(g) 0.49Line 1j: H2O(g) Propane(g) 0.55 GAS_BINARY_PARAMETERS is the keyword for the data block.
Line 1: Gas component 1, gas component 2, coefficient
Gas component 1, gas component 2–Names of the gas component pair
for which the interaction coefficient is defined. These names are gases that
are defined in PHASES definitions.
coefficient –Binary
interaction coefficient for the gas-component pair.
The order of the gas-component pair is irrelevant; the same
binary interaction coefficient applies regardless of the order in which the
pair is defined. Previously, only interaction coefficients that were defined
internally were used in Peng-Robinson gas calculations. The example data block
above gives the internal, hard-coded values. The hard-coded interaction
coefficients will still be used if they are not modified by a
GAS_BINARY_PARAMETERS data block in the database file or the input file.