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

摘要

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 N_2 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.