Influence of slow diffusing species on mixture diffusion of hexane isomers in silicalite: Characterization by a new cyclic method
Identifieur interne : 000896 ( Main/Exploration ); précédent : 000895; suivant : 000897Influence of slow diffusing species on mixture diffusion of hexane isomers in silicalite: Characterization by a new cyclic method
Auteurs : Kader Lettat [France] ; Elsa Jolimaitre [France] ; Mélaz Tayakout [France] ; Daniel Tondeur [France]Source :
- AIChE Journal [ 0001-1541 ] ; 2012-05.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Chargement, Simulation.
- mix :
English descriptors
- KwdEn :
- Adsorbent, Adsorbent saturation loading, Adsorption, Adsorption step, Aiche, Aiche journal, Alkane, Alkane mixtures, American institute, Automatic valve, Axial dispersion, Binary exchange diffusion, Breakthrough, Breakthrough curve, Breakthrough curves, Chem, Classical breakthrough curves, Crystal radius, Cycle number, Cyclic, Cyclic breakthrough curves, Cyclic conditions, Cyclic experiment, Cyclic experiments, Delta loading, Delta loading ratio, Delta loadings, Desorbent, Desorption, Desorption step, Desorption step duration, Desorption steps, Desorption time, Desorption times, Different times, Diffusion, Diffusion model, Diffusivity, Energies nouvelles, Exchange isotherm, Experimental conditions, Experimental results, High desorption times, Imsl library, Isomer, Jolimaitre, Kinetic parameters, Kinetics, Krishna, Langmuir, Langmuir model, Langmuir parameters, Langmuir ratio, Last cycle, Liquid phase, Loading, Mass transfer, Mixture concentration, Modeling, Monobranched, Monobranched isomers, Other hand, Other species, Parameter, Parameter estimation, Parameters estimation, Pellet, Phase concentration, Phys chem, Previous article7, Same adsorption time, Saturation, Saturation concentration, Saturation loading, Selectivity, Silicalite, Simple breakthrough curves, Simulation, Single breakthrough curve, Slow accumulation, Steady state, Thermodynamic, Thermodynamic parameters, Time scale, Volume constraints, Whole cyclic experiment, Zeolite, Zeolite crystals, Zeolite pores.
- Teeft :
- Adsorbent, Adsorbent saturation loading, Adsorption, Adsorption step, Aiche, Aiche journal, Alkane, Alkane mixtures, American institute, Automatic valve, Axial dispersion, Binary exchange diffusion, Breakthrough, Breakthrough curve, Breakthrough curves, Chem, Classical breakthrough curves, Crystal radius, Cycle number, Cyclic, Cyclic breakthrough curves, Cyclic conditions, Cyclic experiment, Cyclic experiments, Delta loading, Delta loading ratio, Delta loadings, Desorbent, Desorption, Desorption step, Desorption step duration, Desorption steps, Desorption time, Desorption times, Different times, Diffusion model, Diffusivity, Energies nouvelles, Exchange isotherm, Experimental conditions, Experimental results, High desorption times, Imsl library, Isomer, Jolimaitre, Kinetic parameters, Krishna, Langmuir, Langmuir model, Langmuir parameters, Langmuir ratio, Last cycle, Liquid phase, Mass transfer, Mixture concentration, Monobranched, Monobranched isomers, Other hand, Other species, Parameter, Parameter estimation, Parameters estimation, Pellet, Phase concentration, Phys chem, Previous article7, Same adsorption time, Saturation concentration, Saturation loading, Selectivity, Silicalite, Simple breakthrough curves, Simulation, Single breakthrough curve, Slow accumulation, Thermodynamic, Thermodynamic parameters, Time scale, Volume constraints, Whole cyclic experiment, Zeolite, Zeolite crystals, Zeolite pores.
Abstract
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. © 2011 American Institute of Chemical Engineers AIChE J, 2012
Url:
- https://api.istex.fr/document/AD08E7214B42A852A7D940E5C0D6A225C7ED9F1A/fulltext/pdf
- https://hal.archives-ouvertes.fr/hal-00656385
DOI: 10.1002/aic.12679
Affiliations:
- France
- Auvergne-Rhône-Alpes, Grand Est, Lorraine (région), Rhône-Alpes
- Nancy
- Centre national de la recherche scientifique, Laboratoire réactions et génie des procédés, Université de Lorraine
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<front><div type="abstract" xml:lang="en">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. © 2011 American Institute of Chemical Engineers AIChE J, 2012</div>
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