Inverse gas chromatography of chromia. Part II. Finite surface coverage
Чланак у часопису
МетаподациПриказ свих података о документу
The interactions of n-hexane, benzene, chloroform, and tetrahydrofuran with dried (amorphous) chromia (I) and chromia heated at 1073 K (crystalline) (II), both obtained from a colloidal dispersion, and a commercially available chromia (III) were Studied by inverse gas chromatography (IGC) under Finite surface coverage conditions. The isotherms, in the temperature range 383-423 K, were used to estimate the surface area, the adsorption energy distribution, the isosteric heat of adsorption, and the spreading pressure on the surfaces of the solids. The uniformly reduced adsorption ability of the heated chromia was attributed to the dehydroxylation of the surface at the higher temperatures. Both solids showed an increased affinity toward chloroform molecules, as a result of strong acid-base interaction.
Кључне речи:inverse gas chromatography / chromia / adsorption / organics / isotherms / isosteric heat
Извор:Journal of the Serbian Chemical Society, 2002, 67, 3, 165-178
ISSN: 0352-5139 (print)