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By Jozsef Toth

ISBN-10: 0824707478

ISBN-13: 9780824707477

Deals an outline of the hot theoretical and sensible effects accomplished in gas-solid (G/S), liquid-solid (L/S), and gas-liquid (G/L) adsorption study.

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Extra resources for Adsorption: Theory, Modeling, and Analysis (Surfactant Science Series, Volume 107)

Example text

The mobility without interactions (VT equation) can only be replaced with a localized adsorption on much larger heterogeneous surface and differential adsorptive potential (To´th equation) than those corresponding to the VT relationship. It can be explained with the following supposition: The large adsorbent–adsorptive (vertical) interaction energies may replace the energies of mobility. G.

According to Eq. (129), we obtain KmF ¼ ðIF ÞÀ1 ð150Þ Finally, the pressure when the total monolayer capacity is completed, Pm yields Eq. (130) or (127), Pm ¼ IF ½ðwF À 1Þ expðBF ފÀ1 E. ð151Þ The Uniform and Consistent Interpretation of the Modified Volmer Equation Volmer [12] was the first scientist to take the mobility of the adsorbed molecules into account. His considerations were based on the dynamic equilibrium between the gas and adsorbed phase and obtained the following relationship:   1 Y Y exp P¼ ð152Þ KV 1 À Y 1ÀY where the exponential term reflects the mobility of molecules in the adsorbed layer.

First, the function cðYÞ is calculated, which, in this case, has the form cmL ðYÞ ¼ wL wL À Y ð117Þ To´th 22 Because cmL ðYÞ ¼ cmL ðPÞ ð118Þ to every value of P calculated by Eq. (115) can be attributed a value of cmL ðYÞ. Thus, we obtain the function cmL ðPÞ numerically. It is evident that if the isotherm investigated can be expressed both in terms of Y ¼ f ðPÞ and P ¼ jðYÞ, then the two methods lead to the same relationship, cðPÞ. A. For Fig. 6 (middle, left), this interpretation of the measured isotherms is thermodynamically exact, because if reflects the fact that the integration in Eq.

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Adsorption: Theory, Modeling, and Analysis (Surfactant Science Series, Volume 107) by Jozsef Toth


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