Kinetics of the non-isothermal desorption of ethanol absorbed onto CMS-3A

  • Nikola S. Jovančić Univerzitet u Beogradu, Fakultet za fizičku hemiju
  • Borivoj K. Adnađević University of Belgrade, Faculty of Physical Chemistry
  • Jelena D. Jovanović University of Belgrade, Faculty of Physical Chemistry
DOI: https://doi.org/10.5937/vojtehg65-12187
Keywords: dependant, absorbers, molecular sieves, Analytical models, model, zeolites, CMS-3A, kinetics, Ethanol, desorption,

Abstract


The kinetics of the desorption of ethanol previously absorbed onto carbon molecular sieves (CMS-3A) was studied using the non-isothermal thermogravimetric technique. The dependence of activation energy (Ea,α) for a particular degree of desorption (α) was established. It was confirmed that the non-isothermal desorption of ethanol was a kinetically complex process. A novel mathematical model for the kinetics of non-isothermal desorption for the absorbed ethanol is established. This model is based on the proposed dependence of the specific desorption rate on time/temperature. The correlation dependences of the model parameters β and η on heating rates were established. A general kinetic equation for the non-isothermal desorption of ethanol was developed. It was found that the specific desorption rate at every single heating rate increases, whereas Ea, decreases during the desorption process.

 

Author Biography

Nikola S. Jovančić, Univerzitet u Beogradu, Fakultet za fizičku hemiju

nastavnik fizike i hemije,

master fizikohemičar

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Published
2017/04/03
Issue
Vol. 65 No. 2 (2017): April – June
Section
Original Scientific Papers

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