Adsorption on Silica and Active Carbon

Adsorption on nanoporous materials is an excellent method for the separation and recovery of gases. Adsorption is not simply an important industrial unitary operation, but also a formidable methodology for the characterization of the surface materials. Another important application of carbon dioxide adsorption as a characterization tool is the measurement of the micropore volume and the pore size distribution of nanoporous materials The adsorption isotherms of CO2 at 273 K in samples degassed at 573 K during 3 h in high vacuum were obtained in an upgraded Quantachrome Autosorb-1 automatic sorption analyzer. High pressure adsorption data were attained for methane, ethane, ethylene, propane, carbon dioxide, and nitrogen on activated carbons. The investigation of silica materials has been a field of vast interest for a long time, given that they are inert and very stable. Silica is one of the most abundant chemical substances on earth found both in crystalline or amorphous form.