Correlation of Multicomponent Gas Adsorption by the Dual-Site Langmuir Model. Application to Nitrogen/Oxygen Adsorption on 5A-Zeolite

Abstract

The dual-site Langmuir model (bimodal two-site discrete distribution with the Langmuir isotherm) provides a powerful framework to correlate multicomponent gas adsorption since it has a flexible mathematical form for pure-gas adsorption, and it provides a flexible way to describe mixed-gas competition. The model meets the requirements imposed by thermodynamic consistency. The power of this model as a correlative tool is analyzed and demonstrated by applying it to a set of single- and multicomponent data for the adsorption of nitrogen and oxygen on 5A-zeolite.