Int J Thermophys (2010) 31:2425–2439
A New Simplified Local Density Model for Adsorption
of Pure Gases and Binary Mixtures
M. Hasanzadeh · M. R. Dehghani · F. Feyzi · B. Behzadi
Abstract
Adsorption modeling is an important tool for process simulation and
design. Many theoretical models have been developed to describe adsorption data
for pure and multicomponent gases. The simplified local density (SLD) approach is
a thermodynamic model that can be used with any equation of state and offers some
predictive capability with adjustable parameters for modeling of slit-shaped pores. In
previous studies, the SLD model has been utilized with the Lennard–Jones potential
function for modeling of fluid–solid interactions. In this article, we have focused on
application of the Sutherland potential function in an SLD–Peng–Robinson model.
The advantages and disadvantages of using the new potential function for adsorption
of methane, ethane, carbon dioxide, nitrogen, and three binary mixtures on two types
of activated carbon are illustrated. The results have been compared with previous models.
It is shown that the new SLD model can correlate adsorption data for different
pressures and temperatures with minimum error.
Keywords Activated carbon · Adsorbed natural gas · Adsorption · Simplified local density · Sutherland potential function
