Get Adsorption Theory Modeling and Analysis Toth PDF

By Jozsef Toth

ISBN-10: 0824707478

ISBN-13: 9780824707477

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

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Example text

IFT is defined by Eq. (223), Pm is calculable from Eq. (226), and KFT is determined by Eq. (225). The calculation of the total monolayer capacity, nsm , is discussed in detail in Section VI. C. The Modified Volmer Equation Applied to Heterogeneous Surfaces (VT Equation) The thermodynamically consistent (modified) mV equation and its function cmV ðYÞ have been defined by Eqs. (160) and (157), respectively. Introducing the parameter t proposed by To´th, we obtain  2 wV ; t>0 ð238Þ cVT ðYÞ ¼ wV À Y t Substitution of Eq.

14 Limiting values of the parameters BB and wB determining the types of BH and mBH isotherms. The mathematically uniform and thermodynamically consistent interpretation of the mBH equation are shown in Figs. 15–17. The function YðPÞ, YðPr;m Þ, cðYÞ, Asr ðYÞ, and Asr ðPr;m Þ in these figures are similar to the corresponding relationships in Figs. 10–12. The essential and immediately observable difference can be seen in the function cðPÞ (see Figs. 10 and 15, top right). H. G. Physical Interpretation of Constants K x Present in the Modified Isotherm Equations Applied to Homogeneous Surfaces Equations (120), (129), (161), and (175) mathematically define the constants KL , KmF , KmV , and KmB present in the corresponding isotherm equations.

133). The absolute minimum points, corresponding to Eq. (134) are Ymin ¼ 0:3333wB ð178Þ The minima of BB , corresponding to Eq. (135) are BB;min ¼ 6:75 wB ð179Þ The values of BB which meet the condition cB ðYÞ ¼ 1 are BB ¼ 2wB À Y ðwB À YÞ2 ð180Þ Equation (180) corresponds to Eq. (137). According to Eqs. (177)–(180), the limits and values of BF mentioned are the following. The mBH equation describes isotherms of Type I when 0 < BB < 2wB . Isotherms of Type V can occur when 2=wB < B < 6:75=wB , and two-dimensional condensation takes place when BB !

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Adsorption Theory Modeling and Analysis Toth by Jozsef Toth


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