A semi-empirical adsorption equation for single component gas-solid equilibria

✍ Scribed by Shivaji Sircar; Ramesh Gupta

• Publisher: American Institute of Chemical Engineers
• Year: 1981
• Tongue: English
• Weight: 629 KB
• Volume: 27
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690270514

✦ Synopsis

Abstract

A semi‐empirical adsorption equation is derived and tested against published equilibrium sorption data on various types of systems. The equation is designed to satisfy the constraints imposed by the physics and the thermodynamics of the adsorption systems. It can describe the Type I and the Type III isotherms as well as their combinations. The model does not restrict the nature of the isosteric heat of adsorption to simplified forms such as a constant or a linear function of the surface coverage. This restriction is primarily responsible for limited applications of the published theories. Empirical equations relating the isosteric heat of adsorption and the surface excess variable are proposed.