Adsorption and diffusion kinetics of alkanes (C3 & C5) on different CaA adsorbents

Autor: M. Fodil Cherif, Fouad Benaliouche, S. Belkhiri, Y. Boucheffa
Rok vydání: 2007
Předmět:
DOI: 10.1016/s0167-2991(07)80058-9
Popis: Adsorption and diffusion kinetics of propane and pentane on CaA molecular sieves having different degrees of calcium exchange (0, 33, 44, 57 and 75% of Ca 2+ ) have been studied using thermobalance under constant pressure of 27kPa and 373 and 523K. The results obtained show clearly the effect of calcium exchange on parameters such as the adsorbed quantities, the initial rates of adsorption and diffusion coefficients. Despite the smaller size of propane molecule, the pentane is more adsorbed and its initial rate of adsorption is more important. This is related to the stronger interaction molecule/wall of zeolite a cavity. Using the model resulting from second Fick's law, a good concordance appears between theoretical and experimental curves of diffusion.
Databáze: OpenAIRE
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