Influence of slow diffusing species on mixture diffusion of hexane isomers in silicalite: Characterization by a new cyclic method - Université Claude Bernard Lyon 1 Accéder directement au contenu
Article Dans Une Revue AIChE Journal Année : 2011

Influence of slow diffusing species on mixture diffusion of hexane isomers in silicalite: Characterization by a new cyclic method

Résumé

The feasibility of mono- and di-branched paraffins separation on silicalite was evaluated by performing cyclic breakthrough experiments in liquid phase with mixtures of 2-methylpentane (2MP), 3-methylpentane (3MP), 2,3-dimethylbutane (23DMB), and 2,2-dimethylbutane (22DMB). For mixtures of the faster diffusing species (2MP, 3MP, and 23DMB), cyclic steady state is obtained from the first cycle. On the other hand, when the slow diffusing species 22DMB is involved, a slow accumulation occurs from cycle to cycle, yielding a change of the breakthrough curves for all the species. Using a diffusion model especially adapted to adsorbent saturation loading, the kinetic and thermodynamic parameters of 22DMB were estimated. Influence of the cycling conditions on the separation performance were finally studied by simulation

Dates et versions

hal-00656385 , version 1 (04-01-2012)

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Citer

K. Lettat, E. Jolimaitre, M. Tayakout, D. Tondeur. Influence of slow diffusing species on mixture diffusion of hexane isomers in silicalite: Characterization by a new cyclic method. AIChE Journal, 2011, ⟨10.1002/aic.12679⟩. ⟨hal-00656385⟩
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