Dimensionless Henry constant

Recall that Kiti is commonly referred to in environmental literature as the Henry s law constant. The dimensionless Henry constant is denoted Kixv/ and is related to by (Eq. 6-6) ... 

The principle of the method may be illustrated by considering the response to the injection of a perfect pulse of sorbate at the column inlet at time zero. The mean retention time t is given by the first moment of the response peak and is related to the dimensionless Henry constant by ... 

If the potential field within the micropores is known as a function of position [[/(r)] the dimensionless Henry constant can be calculated by integration over the accessible pore volume ... 

This expression reduces to Henry s law at low loadings with the dimensionless Henry constant given by ... 

Fig. 21 Variation of diffusional time constant (Dq/R ), dimensionless Henry constant (iC), and the product KDq with temperature. (From data of Chen et al. [127].) The value of Dq/R calculated from reaction rate measurements at 698 K is also shown. Corrected dif-fusivities are calculated from the reported integral diffusivities according to the analysis of Garg and Ruthven [126]. From Ruthven [98]...

Overall heat transfer coefficient Solid film mass transfer coefficient External fluid film mass transfer coefficient Dimensionless Henry constant... 

Where K is the dimensionless Henry constant, Ko is the Van t Hoff pre-exponential factor and AU is the adsorption energy (kJ.mor ). 

Park. S. J., Lim, H. Y., and Park, S.-J. Measurement of dimensionless Henry s law constants of some aromatic compounds using a headspace sampler with a gas chromatograph. Korean Chem. Eng. Res., 42(l) 65-69, 2004. 

First, consider two closed systems, illustrated in Figure 8.5, and let us consider oxygen, with a mass-related dimensionless Henry s law constant of 20. Equilibrium will occur simultaneously with steady state in these two systems. 

Frequently, H is referred to as the dimensionless Henry s constant. To convert from one unit into the other ... 

Dimensionless Henry s constants for organic compounds and water as solvent at 25 °C (partly from Howe el al., 1986)... 

Not only have various names been used for the same concept, Morris (1988) found a variety of values for the equilibrium concentration of ozone in water reported in the literature. Based on the data from more than nine authors, he suggested that a linear correlation between the solubility ratio of ozone,, 5 (which is the inverse of the dimensionless Henry s Law constant Hc), and the temperature can be used as a first estimate for the solubility of ozone in water ... 

If the particular extracting technique applied to a solution depends on the volatility of the solute between air and water, a parameter to predict this behavior is needed to avoid trial and error in the laboratory. The volatilization or escaping tendency (fugacity) of solute chemical X can be estimated by determining the gaseous, G, to liquid, L, distribution ratio, KD, also called the nondimensional, or dimensionless, Henry s law constant, If. 

The Henry s law constant, H, calculated from the ratio of vapor pressure and solubility [equation (2.4)] can be converted to the dimensionless Henry s law constant, H, [equation (2.3)] by the expression... 

Chemical properties that reflect the tendency of a chemical to partition between phases have been constructed specifically for environmental fate applications. These specialized properties are known as partition coefficients. The parameter that is a measure of a chemical s tendency to partition between water and air is known as the dimensionless Henry s constant (KH), determined by the ratio of the... 

Dasgupta and Dong, 1986). The value for the dimensionless Henry s law constant (H nh3 = RT Hnhs) at a temperature of 25°C is 1.37 X 10 . Alternative expressions for Henry s law constant of NH3 in water are listed in the literature compilation by Sander (1999). Recently, a formula for Henry s law constant, corrected for seawater was derived by Gibb et al. (1999a) ... 

The dimensionless Henry s constant given in Gibb et al. (1999a) (see Section 5.2) is erroneous (Johnson et al., 1997 2008). The correct form is ... 

Use Eq. [1-22], with an additional conversion factor for liters to cubic meters, to convert the dimensionless Henry s law constant to a constant with units of atm m3/mol ... 

If the dimensionless Henry s law constant for a chemical, H, is much greater than 0.01—as is the case for a large number of solvents, fuels, and gases— resistance to gas exchange in the stagnant air layer immediately above the water can be neglected. The thin him model then describes the flux of a chemical into or out of the water by... 

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