Linear Isotherm Systems—Solution to the General Model

Linear Isotherm Systems—Solution to the General Model 

For a packed bed of porous uniform adsorbents, the basic equations for mass balance and transfer rates are the same as those given in the previous chapter. 

When surface diffusion is a dominant process in intraparticle diffusion. 

In most cases of surface diffusion kinetics, adsorption rate at the active sites is considered to be rapid enough to assume the attainment of local adsorption equilibrium. Furthermore, when the adsorption isotherm is linear, Eqs. (7-3) and (7-5) are combined to give the following. 

This means that pore diffusion kinetics and surface diffusion kinetics cannot be distinguished in the mathematical treatment so detailed discussion must be added for an understanding of which of the two mechanisms is controlling the actual phenomena. 

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