METHANOL AND METHYL ACETATE VAPOUR ESORPTION FROM THE SURFACE OF CuO / NaX CATALYST

Authors

  • A. Urbutis Kaunas University of Technology
  • S. Kitrys Kaunas University of Technology

Abstract

Kinetic parameters for the process of methanol and methyl acetate vapour desorption from the surface of adsorbent–catalyst CuO / NaX were determined. Two processes – desorption and catalytic reaction – are known to take place simultaneously on the surface of adsorbent–catalyst during the catalytic oxidation of volatile organic compounds.

Adsorption capacities for the load are 151 mg/g of methanol and 186 mg/g of methyl acetate. Adsorption equilibrium is reached within 60–70 minutes.

During one hour of desorption process in the temperature range 30–200 °C, not all methanol and methyl acetate leave the surface of the adsorbent–catalyst. The process is influenced by a slow diffusion of adsorbates from the internal surface. The diameter of the majority of pores is the adsorbent–catalyst CuO / NaX range within 2.0 and 2.3 nm, and specific surface area SBET = 540.8 m2/g. The highest apparent desorption rate coefficient is 0.147 min–1 for methanol and 0.168 min–1 for methyl acetate in isothermal conditions (200 °C). The apparent level of desorption on the average is equal to 0.93 for methanol and 0.82 for methyl acetate.

 

Author Biographies

A. Urbutis, Kaunas University of Technology

S. Kitrys, Kaunas University of Technology

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Published

2010-06-14

Issue

Section

TECHNOLOGY OF INORGANIC MATERIALS