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BETA: Henry’s Constant and Vapor-Liquid Distribution Constant for Gases

in H2O and D2O at High Temperatures

Developed by Russian National Committee (RNC) of

International Association for the Properties of Water and Steam (IAPWS).

This calculation page is based on the

"Guideline on the Henry’s Constant and Vapor-Liquid Distribution Constant for Gases in H2O and D2O at High Temperatures" [1]

provided by IAPWS.

Detailed information about used equations, constants, range of validity etc is presented in PDF version of IAPWS Release which can be downloaded from IAPWS web site www.iapws.org

Authors (and responsible persons):

Moscow Power Engineering Institute (MPEI). Last update: 2012/09/29

Note that displayed last digits depends on numeric implementation of underlying formulations.

Input parameters

Formulation reference values

Dimensionless input parameters

Main equations

The Henry’s constant is represented by the equation

Eq. (3) in [1]

The vapor-liquid distribution constant is represented by the equation

Eq. (5) in [1]

Henry’s Constant

The vapor pressure of the solvent

Coefficients from Table 1 [1] (can be downloaded here in text format):

Eq. (4) in [1]

Coefficients from Table 2 [1] (can be downloaded here in text format):

Extracting data to vectors:

Additional variables and ranges for different solvents to process result as single array:

Calculating Henry's constants for H2O solvent:

Calculating Henry's constants for D2O solvent:

Calculated values of Henry's constants (k_{H} in GPa) and values for ln(k_{H}/GPa):

Check for correct temperature range and fill output matrix

Calculated values of Henry's constants (k_{H} in GPa) and values for ln(k_{H}/GPa) with temperature range check:

Vapor-Liquid Distribution Constant

The dimensionless liquid density along the vapor-liquid saturation boundary

Coefficients from Table 3 [1] (can be downloaded here in text format):

Eq. (6) in [1]

Coefficients from Table 4 [1] (can be downloaded here in text format):

Calculating Vapor-Liquid Distribution Constant for H2O solvent:

Calculating Vapor-Liquid Distribution Constant for D2O solvent:

Calculated values of Vapor-Liquid Distribution Constant and natural logarithm of this quantative:

Calculated values of Vapor-Liquid Distribution Constant with temperature range check:

References

1. Guideline on the Henry’s Constant and Vapor-Liquid Distribution Constant for Gases in H2O and D2O at High Temperatures. Kyoto, Japan, September 2004, available at http://www.iapws.org