Experimental study of isotherms and kinetics for adsorption of water on Aluminium Fumarate

This article presents the adsorption characteristics of Aluminium Fumarate (Al-Fum) Metal Organic Framework (MOF) and water systems for the temperatures ranging from 25 °C to 60 °C and pressures up to saturation conditions. The amount of water uptakes is measured by a gravimetric analyser under static and dynamic conditions. The surface characteristics of Al-Fum are performed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and N2 adsorption analysis. The experimentally measured water uptake data are fitted with Langmurian type isotherm and kinetic equations. The isosteric heat of adsorption is calculated from the concepts of pressure - temperature - uptake co-ordinate system. The pore size distribution shows a wide distribution of micropores. A decent 'S' - shaped isotherm curve is observed from the experimental results. Based on the isotherms and kinetics data, Al-Fum MOF shows a potential adsorbent for heat transmission applications such as heat pump and desalination.