Pentane Henry constant

FIGURE 3.1. Virial plot of log(p/q) versus tj for pentane in 5A zeolite showing extrapolation to determine the Henry constant. (From ref. 10, reprinted by permission from J. Colloid Interface, oc. 84,526. Copyright 1981 Academic Press.)... 

Tables 2 and 3 show that the impregnation of the zeolite NaY 2.4 with palladium does not lead to a significant difference in the adsorption capacity of alkanes except for the 2-methyl butane and n-pentane, the lightest compounds considered in this study. On the other hand significant differences appear between NaY and Pd-NaY for the aromatic compounds Pd-NaY is characterized by lower Henry constants. The maximum deviation between the two solids is observed for m-xylene.

Reported Henry s law constants and octanol-air partition coefficients of n-pentane at various temperatures and temperature dependence equations... 

Logarithm of Henry s law constant versus reciprocal temperature for n-pentane. 

Figure 13-11 SRK calculation of Henry s law constant for carbon dioxide in n-pentane. The solid line is plotted against pressure (bottom axis) at constant temperature the dashed line is plotted against temperature (top axis) at constant pressure.

Henry s law was introduced as a way of calculating the fugacity of a component in solution when the component is above its critical temperature at the temperature of the solution. Nonetheless, Henry s law maybe used even when the component is below its critical point. There is a certain symmetry between the Lewis-Randall rule, which applies in the limit x, 1, and Henry s law, which applies in the limit x, o. The relationship is demonstrated in Figure 13-12. which shows the fugacity of carbon dioxide in n-pentane, plotted as a function of the mol fraction of carbon dioxide at constant temperature. In this case carbon dioxide is below its critical temperature (304.2 K) and forms a liquid solution at all compositions between o and 1. The Lewis-Randall rule gives the fugacity of component by the linear relationship... 

Problem 13.3 The fugacity coefficient of CO2 in liquid n-pentane at 344.15 K, 2.93 bar approaches the value 0 = 39.2. Use this information to calculate Henry s law constant for this system. 

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