SCI和EI收录∣中国化工学会会刊

›› 2010, Vol. 18 ›› Issue (4): 544-553.

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Kinetic Modeling of Isothermal or Non-isothermal Adsorption in a Pellet:Application to Adsorption Heat Pumps

Ludovic Montastruc1,2, Pascal Floquet1, Volker Mayer3, Iordan Nikov2, Serge Domenech1   

  1. 1. Universitéde Toulouse, Laboratoire de Génie Chimique, U. M. R.5503 CNRS/INP/UPS, 31432 Toulouse, France;
    2. ProBioGEM Laboratory, Polytech'lille, 59665, Villeneuve d'Ascq, France;
    3. Laboratoire Paul Painlevé, U. M. R.CNRS 8524, U. F. R. de Mathématiques, 59655 Villeneuve d'Ascq Cedex, France
  • Received:2009-04-23 Revised:2010-03-15 Online:2010-08-28 Published:2010-08-28

Kinetic Modeling of Isothermal or Non-isothermal Adsorption in a Pellet:Application to Adsorption Heat Pumps

Ludovic Montastruc1,2, Pascal Floquet1, Volker Mayer3, Iordan Nikov2, Serge Domenech1   

  1. 1. Universitéde Toulouse, Laboratoire de Génie Chimique, U. M. R.5503 CNRS/INP/UPS, 31432 Toulouse, France;
    2. ProBioGEM Laboratory, Polytech'lille, 59665, Villeneuve d'Ascq, France;
    3. Laboratoire Paul Painlevé, U. M. R.CNRS 8524, U. F. R. de Mathématiques, 59655 Villeneuve d'Ascq Cedex, France
  • 通讯作者: Ludovic Montastruc, E-mail:ludovic.montastruc@ensiacet.fr

Abstract: Understanding the interaction between a fluid and a solid phase is of fundamental importance to the design of an adsorption process.Because the heat effects associated with adsorption are comparatively large,the as-sumption of isothermal behavior is a valid approximation only when uptake rates are relatively slow.In this article,we propose to determine when it is needed to choose the isothermal or non-isothermal assumption according to two physical parameters α (ratio convection/capacity) and β(quantity of energy/capacity) .The proposed problem is solved by a mathematical method in the Laplace domain.When α→∞ (infinitely high heat transfer coefficient) or β→0 (infinitely large heat capacity),the limiting case is isothermal.When the diffusion is rapid (α<10) the kinetics of sorption is controlled entirely by heat transfer.If the adsorption process is to be used as a heat pump,it shall be represented by an isotherm model withαandβas high as possible.

Key words: adsorption, non-isothermal, energy, pellet

摘要: Understanding the interaction between a fluid and a solid phase is of fundamental importance to the design of an adsorption process.Because the heat effects associated with adsorption are comparatively large,the as-sumption of isothermal behavior is a valid approximation only when uptake rates are relatively slow.In this article,we propose to determine when it is needed to choose the isothermal or non-isothermal assumption according to two physical parameters α (ratio convection/capacity) and β(quantity of energy/capacity) .The proposed problem is solved by a mathematical method in the Laplace domain.When α→∞ (infinitely high heat transfer coefficient) or β→0 (infinitely large heat capacity),the limiting case is isothermal.When the diffusion is rapid (α<10) the kinetics of sorption is controlled entirely by heat transfer.If the adsorption process is to be used as a heat pump,it shall be represented by an isotherm model withαandβas high as possible.

关键词: adsorption, non-isothermal, energy, pellet