Kinetics of Kaolinite Dehydroxylation
- 1 March 1974
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 57 (3) , 132-135
- https://doi.org/10.1111/j.1151-2916.1974.tb10835.x
Abstract
When kaolinite is heated under pressures of self‐generated H2O vapor from 0.4 to 3.2 atm, the dehydroxylation is best described by a nucleation‐and‐growth equation withmvarying from 1.10 to 2.16 as the pressure is increased. The temperature coefficient of the rate constant, expressed as an apparent activation energy, varies from 62.4 to 260 kcal/mol. The H2O vapor evolved in a self‐generated‐atmosphere sample holder was automatically swept into a gas chromatograph at fixed intervals. The measurement is specific for H2O.Keywords
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