TG and DSC studies of the surface reaction of γ-Al2O2 with Cl2

F. Réti, I. Bertóti, G. Mink, I. S. Pap

Research output: Contribution to journalArticle

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Abstract

The reaction of Cl2with γ-alumina has been studied in the temperature range 300-1100 K by thermogravimetric (TG) and calorimetric (DSC) methods. Also. GC and MS techniques were used for the analysis of the gas phase, and a volumetric method for studying the adsorption of Cl2 on Al2O3. Measurable adsorption was found only below 500 K. Above 420 K, however, an exchange of surface oxygens by chlorine also takes place, resulting in a mass gain and an exothermic heat effect. The extent of this exchange reaction vigorously increases with temperature, suggesting that oxygens able to take part in the O(surf) + Cl2 = 2Cl(surf) + 1 2O2 reaction are energetically heterogeneous. Above 870 K the fast exothermic exchange reaction is accompanied by a slower, endothermic processs, considered as surface rearrangement together with the formation and volatilization of AlCl3.

Original languageEnglish
Pages (from-to)171-174
Number of pages4
JournalThermochimica Acta
Volume107
Issue numberC
DOIs
Publication statusPublished - Oct 15 1986

Fingerprint

Surface reactions
surface reactions
Oxygen
Adsorption
Aluminum Oxide
Chlorine
Vaporization
Thermal effects
Alumina
Gases
Temperature
adsorption
vaporizing
oxygen
chlorine
temperature effects
aluminum oxides
vapor phases
temperature
aluminum chloride

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Physical and Theoretical Chemistry

Cite this

TG and DSC studies of the surface reaction of γ-Al2O2 with Cl2. / Réti, F.; Bertóti, I.; Mink, G.; Pap, I. S.

In: Thermochimica Acta, Vol. 107, No. C, 15.10.1986, p. 171-174.

Research output: Contribution to journalArticle

Réti, F. ; Bertóti, I. ; Mink, G. ; Pap, I. S. / TG and DSC studies of the surface reaction of γ-Al2O2 with Cl2. In: Thermochimica Acta. 1986 ; Vol. 107, No. C. pp. 171-174.
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