ABSTRACT
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.
