What pressure region should I take for NLDFT pore size distribution calculations?

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M. Yates

The BJH method assmes a liquid meniscus. In such narrow pores these calculations should not be used. BJH is normally used for pores above 4 nm. For microporous materials there are 3 methods Horvath Kowezoe, Saite Fowley of the DFT approach. The first 2 assume ores are cylindrical (zeolites) or plate like (Activated carbons). The DFT approach relies on choosing a suitable model material similar to your sample.p

Vera Butova

Dear Dr. M. Yates,

Thank you for the answer. One more detail - what pressure range is suitable for DFT model?

The DFT approach was first used to have a better understanding of the micropore filling mechanism (relative pressure 0 to 0.3) but now has been extended to also include the mesopore range. Thus, it works over the whole isotherm.

Thank you for your help!