Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 37: Issue 3
Intrinsic kinetics of the oxidation of Na2TiF6 and Na3TiF6
Authors:
K Borowiec Institute of Solid State Technology UL Warsaw University of Technology Noakowskiego 3 00-664 Warsaw

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,
A. Przepiera

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, and
K. Kolbrecka Institute of Solid State Technology UL Warsaw University of Technology Noakowskiego 3 00-664 Warsaw

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Pages:
637–644
Online Publication Date:
24 Jul 2005
Publication Date:
01 Mar 1991
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf01913115
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The intrinsic kinetics, unaffected by diffusional and mass transfer effects, of the air oxidation of Na2TiF6 and Na3TiF6 were determined by using a nonisothermal technique. The oxidation of these sodium fluorotitanates proceeds through two-step reactions involving the formation of oxyfluorotitanate, i.e. Na3TiOF5, as the intermediate. The oxidation rate shows a first-order dependence on the amount of the unreacted solids for each of the two-step reactions for both fluorotitanates. The activation energy for the further oxidation of Na3TiOF5 to a mixture of NaF + TiO2 was determined to be 52.4 kJ/mol and 55.3 kJ/raol for Na2TiF6 and Na3TiF6 as reactants, respectively.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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