FREUNDLICHS ISOTHERM EXTENDED BY STATISTICAL-MECHANICS

In this paper we obtain an asymptotic development compatible with Freu ndlich's isotherm, theta = KCm. That expression was derived underlying the theory of heterogeneous surface. We assume the distribution funct ion of adsorption sites to be in the exponential form and the sites to follow the Langmuir energy homogeneous isotherm. The derived expressi on represents an analytical solution to the fundamental integral equat ion for the overall adsorption isotherm in its correct integration lim it, From this expression we clearly identify the parameters K and m, t he Freundlich parameters. We applied this expression to fit the experi mental data for the adsorption of CO2 into BPL-activated carbon. (C) 1 997 Academic Press