A study of the storage capacity for energetic gases on activated carbon monoliths and their relation with the textural characteristics

A.A. GARCÍA BLANCO1, J.C. ALEXANDRE DE OLIVEIRA, R. LÓPEZ, J.C. MORENO-PIRAJÁN, L. GIRALDO, G. ZGRABLICH, K. SAPAG

USA

Workshop; Characterization of Porous Materials: from Angstroms to Millimeters; 2009

RUTGER UNIVERSITY

In this work, it is studied the characterization of microporous monoliths of activated carbon from coconut shell and their capacity to storage energetic gases. Adsorption isotherms of nitrogen, methane, carbon dioxide and hydrogen were measured at subatmospheric pressure at different temperatures. Additional studies of methane at room temperature and high pressure (up to 4 Mpa) are presented. A grand Canonical Monte Carlo simulation of adsorption on slit pores was calculated for these gases. Isosteric heats of adsorption and pore size distribution were estimated from simulated isotherms. The measured and simulated data were compared to optimize the models. Different characterization methodologies for microporous materials, including some parameters such as micropore volume, pore size distribution and isosteric heats, were studied and their properties were related with their storage capacity.