Methane adsorption on various metal-organic frameworks and determination of the average adsorption heats at supercritical temperatures and pressures

Resumo

Adsorption of methane on three samples of metal-organic framework structures (MOF), which contain copper, aluminum or zinc atoms, was measured at temperatures ranging from 303 to 333 K and pressures up to 40 MPa using a precise volumetric-gravimetric unit. The determined values of adsorption volumes and characteristic energies served to evaluate the average heats of adsorption, which were compared to the average isosteric heats of adsorption.