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Kinetic study of the dehydration of lithium sulphate monohydrate

✍ Scribed by Françoise Valdivieso; Vincent Bouineau; Michèle Pijolat; Michel Soustelle

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
377 KB
Volume
101-103
Category
Article
ISSN
0167-2738

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✦ Synopsis

The dehydration of lithium sulphate monohydrate has been studied by isothermal thermogravimetry at 8O"C, under various partial pressures in water vapour. The kinetic curves are sigmoid, they are interpreted with a model involving nucleation and growth steps: the nucleation is supposed to occur at the surface of the grains and is followed by a rapid two-dimensional growth, the new phase developing towards the centre of the grains. The studied powder being composed of ellipsoidal particles, this geometry is taken into account in the model.

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