Interrelations between Adsorption Energies and Local Isotherms, Local Monolayer Capacities, and Energy Distribution Functions, as Determined for Heterogeneous Surfaces by Inverse Gas Chromatography
✍ Scribed by Nicholas A. Katsanos; Efstathia Iliopoulou; Vassilis Plagianakos; Helen Mangou
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 150 KB
- Volume
- 239
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
Physicochemical parameters for adsorption of gases at the submonolayer regions of heterogeneous solid surfaces are measured experimentally as a function of time, and then interrelated as local isotherms θ against adsorption energy ε, fractional changes of adsorption sites f (ε)/c * max against ε, θ against f (ε)/c * max , and distribution functions θ f (ε)/c * max over adsorption energy values ε, without using at all the well-known integral equation ( p, T) = ∞ 0 θ( p, T, ε) f (ε) dε and assumptions concerning the pair f (ε) and θ( p, T, ε). The method uses only chromatographic experimental data obtained by the inverse gas chromatography technique known as reversed-flow gas chromatography. It has been applied to the adsorption of cis-2-butene and trans-2-butene onto particles of Penteli marble at temperatures of 302, 314, 323, and 333 K. The results obtained are comparable with those calculated on the basis of the well-known integral equation.