Thermodynamically Consistent Analysis of Silica Surface Heterogeneity Using Alkane and Alkene Adsorption Isotherms
Adsorption isotherms for butane and butene, measured on silica samples at different temperatures, are used as a data base for describing these gas-solid adsorption systems. Data are analyzed using non-parametric regression and the stable numerical method for solving the adsorption integral equation. The adsorption energy scale of the calculated distributions is assessed on the basis of its consistency with the isosteric heats of adsorption. The effect of lateral interactions between adsorbed molecules on the results obtained is discussed. The adsorption properties of the initial and heat treated silica samples are discussed in terms of their butane and butene adsorption energy distributions.
KeywordsHydroxyl Silicate Covariance Alkene Liquefaction
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