The kinetics of water adsorption on porous alumina

✍ Scribed by Lis Marcussen

• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 968 KB
• Volume: 25
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(70)85070-9

✦ Synopsis

This paper deals with a theoretical and experimental investigation of adsorption kinetics. The theoretical calculations of the mass transfer rates are based on a model, which considers a nonlinear adsorption isotherm and simultaneous resistance to mass transfer in the pore system of the solid and in a film surrounding the particle. Numerical solutions to the model are calculated for Freundlich and Langmuir isotherms. This model is in close agreement with results from the experiments, which were performed by sending an airstream with constant velocity, humidity and temperature through a single layer of alumina spheres. The adsorption rates were measured by weighing at definite times. Experiments were carried out with different values of gas velocity, humidity and particle radius.

A comparison between theory and experiments allows a determination of both the effective diffusion coefficient Deft in the pore system and the gas film resistance as a function of gas velocity. This results in Deff = 3.6 x 10e6 m*/sec j, = 0.85 X RemO+. P Inert gos stream with q dsorbote concentration cy starts flowing Dost the sphere bt t=o coefficient h 1487 cEsVOL23.NqS