Kinetic evaluation of the dehydration of Yb(III) Lu(III) and Y(III) 4-chlorobenzylidenepyruvate by thermogravimetry (TG)

Kinetic evaluation of the dehydration of Yb(III) Lu(III) and Y(III) 4-chlorobenzylidenepyruvate by thermogravimetry (TG)

Kinetic evaluation of the dehydration of Yb(III) Lu(III) and Y(III) 4-chlorobenzylidenepyruvate by thermogravimetry (TG)

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Nedja Suely Fernandes; Antônio Souza de Araujo; Massao Ionashiro

doi:10.26850/1678-4618eqj.v31.2.2006.p39-43

Vol. 31 No. 2 (2006), Original articles

Vol. 31 No. 2 (2006)

Original articles

https://doi.org/10.26850/1678-4618eqj.v31.2.2006.p39-43

Published 2006-06-26

Nedja Suely Fernandes⁺⁻
Antônio Souza de Araujo⁺⁻
Massao Ionashiro⁺⁻

Nedja Suely Fernandes

Universidade Federal do Rio Grande do Norte, Departamento de Química, Natal, Brasil.

Antônio Souza de Araujo

Universidade Federal do Rio Grande do Norte, Departamento de Química, Natal, Brasil.

Massao Ionashiro

Universidade Estadual Paulista, Instituto de Química, Araraquara, Brasil.

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kinetic
thermogravimetry
lanthanides
thermal decomposition

Fernandes, N. S., de Araujo, A. S., & Ionashiro, M. (2006). Kinetic evaluation of the dehydration of Yb(III) Lu(III) and Y(III) 4-chlorobenzylidenepyruvate by thermogravimetry (TG). Eclética Química, 31(2), 39–43. https://doi.org/10.26850/1678-4618eqj.v31.2.2006.p39-43

The dehydration kinetic of Yb, Lu and Y 4-chlorobenzylidenepyruvate was studied by
using thermogravimetry and the kinetics parameters obtained by Flynn and Wall method suggest that
the dehydration step follows a first order mechanism. The activation energies calculated were 103.6,
96.6 and 97.2 kJ/mol and the lifetime considering the temperature of 31 and 101 o C for the dehy-
dration of these compounds were 23, 26, 31 minutes and 0.6, 1.3 and 1.4 seconds, respectively. The
results have similar values and suggest that the water is attached in the same way.

https://doi.org/10.26850/1678-4618eqj.v31.2.2006.p39-43

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