By Jozsef Toth
Bargains an outline of the new theoretical and useful 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 Toth
However, the function cðPÞ, especially in lower domain of pressure (see bottom in Fig. 18), are very different and characteristic for the corresponding isotherm equation. So, after calculation of the function cðPÞ, the correct isotherm equation can be selected and applied for the isotherm measured on a homogeneous surface. Interpretation of Adsorption Isotherms 41 FIG. 18 Comparison of isotherms of Type I and the corresponding functions cðPÞ calculated by the mL, mV, mFG and mBH equations. The values of parameters are as follows: mL: KmL ¼ 0:04 kPaÀ1 , wL ¼ 1:03, Pm ¼ 833:3 kPa; mV: KmV ¼ 0:50 kPaÀ1 , wV ¼ 1:30, Pm ¼ 187:0 kPa; mFG: KmF ¼ 0:08 kPaÀ1 , wF ¼ 1:05, Pm ¼ 112:3 kPa; mBH: KmB ¼ 0:15 kPaÀ1 , wB ¼ 1:40, Pm ¼ 136:1 kPa.
18 are plotted the functions cðPÞ corresponding to isotherms Type I, which can be seen in the top (right) of Fig. 18. These isotherms of Type I are very similar; therefore, with a simple ﬁtting procedure the thermodynamically correct isotherm equation cannot be selected. However, the function cðPÞ, especially in lower domain of pressure (see bottom in Fig. 18), are very different and characteristic for the corresponding isotherm equation. So, after calculation of the function cðPÞ, the correct isotherm equation can be selected and applied for the isotherm measured on a homogeneous surface.
9. The regions of coverages where cðYÞ > 1 and cðYÞ < 1 and the point where the proportional line drawn from the origin is a tangent can be seen. , the isotherm begins with a Henry section). The above analysis is also represented in Fig. 8. The ﬁrst ﬁgure ðwF ¼ 1Þ relates to the original FG equation, which can describe Types I and V and condensation isotherms. However, for Type V isotherms, the value of BF tends to inﬁnity when Y tends to 1. In this fact is also reﬂected the thermodynamical inconsistency of the original FG equation.