On the adsorption of CO2 by molecular sieve carbons—Volumetric and gravimetric studies Original Research Article

Two microporous carbons, derived from the same phenolic resin at 700 and 1000 °C, were investigated by volumetric and gravimetric adsorption of CO2 and N2 at different temperatures. The combination with immersion calorimetry into liquids of different molecular sizes reveals the presence of constrictions near 0.4–0.45 nm leading into relatively large micropores. The size of the constrictions and the micropore volume are smaller for the solid prepared at 1000 °C.