TG study on the reaction of γ-Al2O3 by CCl4. Part I. Kinetic model for the chlorination process

I. S. Pap, I. Bertóti, Gy Mink

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Thermogravimetric (TG) measurements were carried out to study the chlorination of γ-alumina by gaseous CCl4 in the temperature range 650-1123 K at 102-104 Pa CCl4 partial pressure. Experimental results indicate that the reaction involves two main steps: the substitution of oxygen atoms on the surface by chlorine leading to a mass gain and the volatilization of the main gaseous product, aluminium chloride, with a mass loss of the sample. These processes take place simultaneously during the course of the reaction. A kinetic model is proposed to describe these two steps providing a simple method for linearization of the initial part of the isothermal TG curves. Temperature and partial pressure dependence of the reaction rate and of the steady-state surface coverage are discussed on the basis of the proposed kinetic model. Activation energies and reaction orders are calculated for these two steps.

Original languageEnglish
Pages (from-to)69-81
Number of pages13
JournalThermochimica Acta
Volume79
Issue numberC
DOIs
Publication statusPublished - Sep 1 1984

Fingerprint

chlorination
Chlorination
Partial pressure
Aluminum chloride
Kinetics
partial pressure
Aluminum Oxide
Chlorine
kinetics
Surface states
Vaporization
Linearization
Reaction rates
aluminum chlorides
vaporizing
Substitution reactions
Alumina
Activation energy
Chemical activation
linearization

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Physical and Theoretical Chemistry

Cite this

TG study on the reaction of γ-Al2O3 by CCl4. Part I. Kinetic model for the chlorination process. / Pap, I. S.; Bertóti, I.; Mink, Gy.

In: Thermochimica Acta, Vol. 79, No. C, 01.09.1984, p. 69-81.

Research output: Contribution to journalArticle

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