Abstract
Porous inorganic oxides are energetically heterogeneous due to various types of surface hydroxyls, impurities as well as surface and structural irregularities. There exist many methods to extract information about energetic heterogeneity of inorganic oxides from the low-pressure adsorption isotherms, gas chromatographic data as well as thermode-sorption data. This heterogeneity is commonly characterized in terms of the adsorption energy distribution function. The current review presents a brief survey of the methods recommended especially to evaluate the adsorption energy distributions for porous inorganic oxides. A special emphasis is placed on the numerical procedures, which provide stable results. Some illustrations are given for porous silicas, which are the most popular inorganic oxides used as adsorbents, chromatographic packings and catalyst supports.
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