Dubinen-Kaganer equation

Kaganer [80,81] modified E)ubinin s method in order to calculate the surface area within micropores where, essentially, he assumed that (vq) was the volume adsorbed at monolayer coverage. He assumed a 

Gaussian distribution of adsorption over the surface sites i.e. he assumed VIVm. = exp(-/fc 3). 

Ramsay and Avery [82] investigated nitrogen adsorption in microporous silica compacts for 10-2 x 10-4 and found that 7 kJ moI-1 for loose powder and increased with compaction and decrease in pore size. They found close agreement between amount adsorbed at monolayer coverage and intercept volume using the D-K equation, which indicated surface coverage as opposed to volume filling. 

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