Effect of potassium additives on the reactivity of titania

G. Mink, I. Bertóti, I. S. Pap, M. Mohai, T. Székely, Tran Minh Duc, E. Karmazsin

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Titania with varying potassium content was chlorinated by phosgene or gaseous tetrachloromethane. The kinetics of the reactions were studied by thermogravimetry, and the surface structure and the electronic state of the samples investigated by electron spectroscopy for chemical analysis (ESCA). Apparent activation energies and reaction orders were determined in temperature ranges where the reaction was controlled by chemical processes. By comparing the reactivities of the samples the following conclusions could be drawn: increasing potassium content resulted in an increase of the reaction rate for the reaction of titania with phosgene, while in the case of tetrachloromethane, potassium additive strongly retarded the reaction. On the basis of ESCA and kinetic results a change in the reaction mechanism generated by surface potassium was assumed.

Original languageEnglish
Pages (from-to)251-267
Number of pages17
JournalReactivity of Solids
Volume4
Issue number3
DOIs
Publication statusPublished - 1987

Fingerprint

Potassium
potassium
reactivity
Phosgene
titanium
Titanium
Electron spectroscopy
Carbon Tetrachloride
phosgene
carbon tetrachloride
chemical analysis
electron spectroscopy
Electronic states
reaction kinetics
Chemical analysis
Reaction kinetics
Surface structure
Reaction rates
Titania
Thermogravimetric analysis

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Effect of potassium additives on the reactivity of titania. / Mink, G.; Bertóti, I.; Pap, I. S.; Mohai, M.; Székely, T.; Duc, Tran Minh; Karmazsin, E.

In: Reactivity of Solids, Vol. 4, No. 3, 1987, p. 251-267.

Research output: Contribution to journalArticle

Mink, G. ; Bertóti, I. ; Pap, I. S. ; Mohai, M. ; Székely, T. ; Duc, Tran Minh ; Karmazsin, E. / Effect of potassium additives on the reactivity of titania. In: Reactivity of Solids. 1987 ; Vol. 4, No. 3. pp. 251-267.
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AU - Duc, Tran Minh

AU - Karmazsin, E.

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