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** Component fugacity coefficients, calculation **

The fugacity coefficient is a function of temperature, total pressure, and composition of the vapor phase it can be calculated from volumetric data for the vapor mixture. For a mixture containing m components, such data are often expressed in the form of an equation of state explicit in the pressure [Pg.26]

CALCULATE FUGACITY COEFFICIENTS FOR NQN-ASSOCI ATING COMPONENTS [Pg.267]

CALCULATE FUGACITY COEFFICIENTS FOR ASSOCIATING COMPONENTS WITH CHEMICAL THEORY. FIRST CALCULATE THE EOUILIBRIUM CONSTANTS. [Pg.267]

Figures 3 and 4 show fugacity coefficients for two binary systems calculated with Equation (10b). Although the pressure is not large, deviations from ideality and from the Lewis rule are not negligible. |

Details for calculating fugacity coefficients are given in Appendix A. [Pg.38]

PHIS calculates vapor-phase fugacity coefficients, PHI, for each component in a mixture of N components (N 5. 20) at specified temperature, pressure, and vapor composition. [Pg.299]

PHIS CALCULATES VAPOR PHASE FUGACITY COEFFICIENTS PHI, FOR ALL N [Pg.300]

The fugacity in the gas phase can be obtained from the fugacity coefficient ( ), calculated with a suitable equation of state, [Pg.373]

The Lewis fugacity rule is used for calculating the fugacity coefficients of the true species, and (2) the second virial co- [Pg.134]

The fugacity coefficient of component i at saturation is obtained after the calculation of the vapor fugacity at saturation, by the relation [Pg.153]

Chapter 3 discusses calculation of fugacity coefficient < ). Chapter 4 discusses calculation of adjusted activity coefficient Y fugacity of the pure liquid f9 [Equation (24)], and Henry s constant H. [Pg.24]

It is important to be consistent in the use of fugacity coefficients. When reducing experimental data to obtain activity coefficients, a particular method for calculating fugacity coefficients must be adopted. That same method must be employed when activity-coefficient correlations are used to generate vapor-liquid equilibria. [Pg.27]

However, when carboxylic acids are present in a mixture, fugacity coefficients must be calculated using the chemical theory. Chemical theory leads to a fugacity coefficient dependent on true equilibrium concentrations, as shown by Equation (3-13). [Pg.133]

The A-values are calculated by Equation 1.25, with the vapor phase fugacity coefficients calculated from the equation of state and the liquid phase fugaeity coefficients for an ideal solution calculated as [Pg.35]

Figure 3-7. Fugacity coefficients for a saturated mixture of propionic acid (1) and raethylisobutylketone (2). Calculations based on chemical method show large variations from ideal behavior. |

SETNAK - CREATES THE PARAMETER ARRAYS FOR FUGACITY COEFFICIENT CALCULATIONS [Pg.609]

IF BINARY SYSTEM CONTAINS NO ORGANIC ACIDS. THE SECOND VIRTAL coefficients ARE USED IN A VOLUME EXPLICIT EQUATION OF STATE TO CALCULATE THE FUGACITY COEFFICIENTS. FOR ORGANIC ACIDS FUGACITY COEFFICIENTS ARE PREDICTED FROM THE CHEMICAL THEORY FOR NQN-IOEALITY WITH EQUILIBRIUM CONSTANTS OBTAINED from METASTABLE. BOUND. ANO CHEMICAL CONTRIBUTIONS TO THE SECOND VIRIAL COEFFICIENTS. [Pg.266]

SET UP THE ARRAYS CONTAINING THE PARAMETERS FOR THE NAKAMURA FUGACITY COEFFICIENT CALCULATIONS [Pg.612]

To use Equation (13), it is first necessary to calculate the true fugacity coefficient (ft. This calculation is achieved by utilizing the Lewis fugacity rule [Pg.33]

Figure 13 presents results for a binary where one of the components is a supercritical, noncondensable component. Vapor-phase fugacity coefficients were calculated with the virial [Pg.59]

Subroutine MULLER. MULLER iteratively solves the equilibrium relations and computes the equilibrium vapor composition when organic acids are present. These compositions are used by subroutine PHIS2 to calculate fugacity coefficients by the chemical theory. [Pg.220]

As discussed in Chapter 3, the virial equation is suitable for describing vapor-phase nonidealities of nonassociating (or weakly associating) fluids at moderate densities. Equation (1) gives the second virial coefficient which is used directly in Equation (3-lOb) to calculate the fugacity coefficients. [Pg.133]

As discussed in Chapter 3, at moderate pressures, vapor-phase nonideality is usually small in comparison to liquid-phase nonideality. However, when associating carboxylic acids are present, vapor-phase nonideality may dominate. These acids dimerize appreciably in the vapor phase even at low pressures fugacity coefficients are well removed from unity. To illustrate. Figures 8 and 9 show observed and calculated vapor-liquid equilibria for two systems containing an associating component. [Pg.51]

With these expressions for the activity coefficients, the equilibrium constants and Henry s constant calculated with the fit equations (S.4) and (S.7)> and the fugacity coefficients calculated using Nakamura s method as outlined in Appendix 9.3, the nine unknown concentrations may be determined for set input amounts of HjO and SO2 with the Newton-Raphson method using equations (S.l). (S.2), (S.3), (S.5), (S.6), (S.8), (S.9), (S.IO) and (S.ll) as the system model. An example of such a calculation is shown in Figure 9.10. [Pg.647]

With the critical data, acentric factors, and the binary parameters, the pure component and mixture parameters have to be calculated for a temperature of 723.15 K. As initial composition, the mole fractions determined assuming ideal gas behavior are used and the parameters required for the calculation of the fugacity coefficients calculated. [Pg.541]

See also in sourсe #XX -- [ Pg.369 , Pg.370 , Pg.371 , Pg.372 ]

** Component fugacity coefficients, calculation **

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