Adsorption Properties of Aluminum Oxide Modified with Co and CoO Particles

摘要

Adsorption properties of gamma-Al2O3 modified with Co (5 and 10 wt %) and Co (5 wt %) species are investigated by dynamic adsorption. N-hexane, n-heptane, n-octane, benzene, toluene, ethylbenzene, chloroform, and diethyl ether were used as test adsorbates. Adsorption isotherms were measured, and isosteric adsorption heats were calculated for the indicated sorbates. It was shown that the adsorption isotherms of all the adsorbates and at all the temperatures of measurements on gamma-Al2O3 modified with Co (5 wt %) and CoO (5 wt %) nanoparticles located above that recorded for the initial gamma-Al2O3 sample. It was established that the surface of modified gamma-Al2O3 possessed mainly electron-accepting properties. The 5% Co/gamma-Al2O3 and 5% CoO/gamma-Al2O3 nanocomposites exhibited the greatest adsorption capacity relative to aromatic hydrocarbons.