ABSTRACT
This chapter addresses two limiting forms of equilibrium behavior rather than cover the entire operational range of an isotherm. The precise measurements of low concentration gaseous equilibria on a well-defined sorbent reported in the text by Ruthven. These data show good internal consistency. Henry constants are frequently needed in analyzing or improving low concentration purification processes. Henry's constants obtained by fitting a wide range of gaseous isotherm data on activated carbon to reliable isotherm equations, as reported in the text by Valenzuela and Myers. The chapter considers an aqueous solution carrying traces of n-hexane, benzene, and toluene, which is to be treated by passage through a bed of activated carbon. For the zeolite sorbent, standard saturation capacities reported by the manufacturer were used. The excellent correlation obtained for both activated carbon and silica gel is due solely to the fact that single values were chosen for the limiting liquid capacities.
