Resumo

CORONA, L. et al. Calores de adsorción de n-hexano, n-heptano, n-octano y n-nonano en microporos (erionita, clinoptilolita y SiO₂) a bajos grados de cobertura. Superf. vacío [online]. 2009, vol.22, n.3, pp.38-43. ISSN 1665-3521.

Heats isosteric of light hydrocarbons (alkanes) adsorption on microporous substrates (clinoptilolite, erionite zeolites and SiO₂) was studied by the inverse gas chromatography method at zero coverage. The substrates were characterized by XR diffraction, surface area measurement, and chemical analysis. Alkanes adsorption (n-hexane, n-heptane, n-octane and nnonane) was investigated in the temperature range 423-623 K, using a conductivity thermal detector, and helium as a carrier gas. The heat of adsorption for alkanes were calculated from the retention data through Clausius-Clapeyron equation. From these results the activated effect showed by ERIN zeolite is relevant.

Palavras-chave : Adsorption; Zeolite; Activated effect; Isosteric Heat of Adsorption.