CO2/CH4 Separation by Adsorption using Nanoporous Metal organic Framework Copper-Benzene-1,3,5-tricarboxylate Tablet

Abstract

Equilibrium data for carbon dioxide and methane adsorption on nanoporous metal organic framework Cu-BTC powder and tablets were measured in a magnetic suspension balance in the temperature range of 308-373K and a pressure range of 0-7bar and fitted with Langmuir model. The tablets adsorption loading is 0.63molkg-1 for methane and 3.1molkg-1 for carbon dioxide at 1bar and 308K, while these values are 0.77 and 3.9molkg-1 for powder in the same conditions. Isosteric heats of adsorption were 22.8 and 15.0kJmol-1 for carbon dioxide and methane, respectively, on both adsorbents, which indicates a strong adsorption of carbon dioxide. Also, single and binary breakthrough curves were measured in the same temperature range and atmospheric pressure by using Cu-BTC tablets as adsorbent. A complete model was used in the simulation of breakthrough curves and good agreement was observed with experimental data.