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

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Published: Jun 26, 2006
DOI: https://doi.org/10.26850/1678-4618eqj.v31.2.2006.p39-43
Keywords:
kinetic, thermogravimetry, lanthanides, thermal decomposition

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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.

Abstract

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.

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How to Cite
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
Issue
Vol. 31 No. 2 (2006): Eclética Química
Section
Original articles
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