Abstract
Adsorption and desorption isotherms of nitrogen are widely used for the determination of the pore structures of adsorbents, catalysts, and other porous solids. Recently, the present authors published a paper in which they offered two new methods of pore structure analysis. These methods, like the previous ones, employ the capillary condensation region of the isotherms for the analysis—the region in which the adsorption and desorption isotherms differ from each other. The considerations advanced in the present paper attempt to answer the questions ( a) why in most instances the desorption isotherm, but in certain instances the adsorption isotherm, gives better results for pore structure analysis; ( b) what are the advantages of the two new methods over those presently employed; and ( c) why the cylindrical pore shape idealizations used by most investigators frequently give reasonable results.
Published Version
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