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
Some Consequences of the Application of Incorrect Gas/Solid Adsorption Isotherm Equations
✍ Scribed by József Tóth
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 209 KB
- Volume
- 185
- Category
- Article
- ISSN
- 0021-9797
No coin nor oath required. For personal study only.
✦ Synopsis
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 transimplicit form defined as formed to a correct relationship and from this modified form correct values of the specific surface areas and isosteric heats of adsorption can be calculated. This correct form does not violate the c(U) Å (U/p)(dp/dU), [2] old principle of the dynamic equilibrium of physical adsorption.
📜 SIMILAR VOLUMES
new equation for gas adsorption on microporous solids is proposed on the basis of the exponential adsorption isotherm. which is generated by the virial expansion of the spreading pressure. Expressions associated with this equation are derived also for the adsorption potential distribution. the diffe
It is shown that one can predict the adsorption of a binary gas mixture from the adsorption of individual component gases by means of John's isotherm. It is found that the slope and intercept of John's adsorption isotherm for binary mixture is equal to mean of the slopes and intercepts of individual