CH4 and CO2 adsorption capacity at 25, 50 and 75°C was evaluated in two metal-organic frameworks: Al-BDC and ZIF-8, the later with zeolite topology. Adsorption experiments were carried out under static conditions using a gravimetric suspension balance until 40 bar of pressure. Adsorption isotherms of type I were obtained for both materials showing high adsorption capacity values. ZIF-8 exhibited the higher uptake value for both CH4 and CO2 (4.9 and 8.5 mmol g-1, respectively). The Toth equilibrium model was used to fit experimental isotherms in order to obtain qm (maximum adsorption capacity) and t (related to energetical heterogeneity of the surface). Isosteric heats of adsorption were also calculated by Clausius-Clapeyron equation.Thanks to UNESCO/Keizo Obuchi Research Fellowships Programme (UNESCO/Japan Young Researcher’s Fellowship Program), Cycle 2012, Programa de Becas para la realización de la tesis doctoral en la Universidad de Málaga convocatoria curso 2011-2012 (AUIP-UMA), European project 295156, FP7-PEOPLE-2011-IRSES and MINECO, Spain, Project CTQ2015-68951-C3-3-R and FEDER funds. Dr. Giselle Autié Castro thanks to CNPq-TWAS Postdoctoral Fellowship 2014 and its financial support
