Which model fits properly s-shaped isotherm for adsorption of Gas on Solid surfaces?

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Malek Hassanpour

Dear researcher

In the BET isotherm with P/ Psaturate = 0.35-.05, the isotherm is not linear and become s-shaped.

Regards

Pieter Bertier

Can you show us that S-shaped isotherm? Is it an N2 isotherm, and can you give some information on your sample?

Please have a look at this book section:11.6.5, Figure 11.11.

You also can find similar cases in chapter 12, etc.

Best regard