Based on a modified form of the Gibbs equation, two conditions of thermodynamical correctness have been defined. According to these conditions the change in the free energy of the surface-calculable from all isotherm equations-must have finite limiting values at \(\theta \rightarrow 0\) and \(\theta
Virial-type thermal equation of gas—solid adsorption
✍ Scribed by Leszek Czepirski; Jacek JagieŁŁo
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 434 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0009-2509
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✦ Synopsis
A thermal adsorption equation in a virial form is proposed in order to describe the pressure and temperature dependence of adsorption data. This equation permits the elaboration of a method for calculating the isosteric heat of adsorption and for studying its behaviour over a wide range oftemperatures and pressures.
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## 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 good mathematical applicability, the forms of the two mentioned equations-from a thermodynamic standpoint-are incorrect. As a consequence, the correct specific surface areas of the where U is the coverage and the function c(U) has an adsorbents cannot be calculated. The To ´th equation can be tr