Binary Adsorption at a Constant Pressure

Assuming that Lewis rule applies regardless of the pressure and that the value for j and 2 specified only by the value one expects for the pure adsorbate (1 or 2) at the specified pressure then Eq. (172) could be symbolized as. 

It is clear that within the space of the pores that it is not possible for both adsorbates 1 and 2 to follow the x equation or the standard curve. If adsorbate 1 has a much higher EJ than adsorbate 2 then the adsorption of 1 will predominate and adsorbate 2 will fill out the remaining space according to Lewis rule. Therefore, the value of Xc for adsorbate 1 will remain unchanged, whereas X for adsorbate 2 will change due to the pre-adsorption of 1. For whatever total pressure is used, then Up will equal n i at that pressure. Picking a particular pressure for a standard (in many cases 1 atm at which the experiment is performed) and since n is linear with x, this yields two equations 

An example of some data where both the pure adsorption isotherms were obtained over a broad pressure range and the binary phase diagrams at 

1 atm pressure were also measured are given by Danner and Wenzel [40]. The measurements were made for the various combinations of CO, N2 and 

A summary of the obtained parameters is given in Table 25. The analyses of the adsorption isotherms for the pure adsorbate is given in Chapter 6. The simple, flat-surface x theory is not appropriate for analysis in micropores and the expansion on the theory is present in Chapter 6. The order of the lEgls are 

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