Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 67: Issue 2
Kinetic Study of Chelates of 2,2,6,6-tetramethyl-3,5-heptanedione with Some Lanthanide Elements
Authors:
A. Souza Universidade Federal da Paraíba Departamento de Química, CCEN 58059-900 João Pessoa, Paraíba Brazil 58059-900 João Pessoa, Paraíba Brazil

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M. Tavares Universidade Federal da Paraíba Departamento de Química, CCEN 58059-900 João Pessoa, Paraíba Brazil 58059-900 João Pessoa, Paraíba Brazil

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D. Melo Universidade Federal do Rio Grande do Norte Departamento de Química, CCET Natal, Rio Grande do Norte Brazil Natal, Rio Grande do Norte Brazil

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M. Conceição Universidade Federal da Paraíba Departamento de Química, CCEN 58059-900 João Pessoa, Paraíba Brazil 58059-900 João Pessoa, Paraíba Brazil

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J. Espinola Universidade Federal da Paraíba Departamento de Química, CCEN 58059-900 João Pessoa, Paraíba Brazil 58059-900 João Pessoa, Paraíba Brazil

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C. Airoldi Universidade Estadual de Campinas Instituto de Química Caixa Postal 6154 13083-970 Campinas, São Paulo Brazil Caixa Postal 6154 13083-970 Campinas, São Paulo Brazil

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Pages:
351–357
Online Publication Date:
01 Nov 2004
Publication Date:
01 Feb 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1013919014587
Keywords:
kinetic analysis; lanthanide; 2,2,6,6-tetramethyl-3,5-heptanodione; thermal decomposition; thermogravimetry
Restricted access

Abstract  

The thermal decomposition reactions of crystalline chelates of general formula Ln(thd)3 (Ln=La,Pr, Nd, Sm and Gd; thd=2,2,6,6-tetramethyl-3,5-heptanedione) have been studied by isothermal thermogravimetry. Several models were proposed initially to calculate the kinetic parameters by isothermal method, thus the time reduced method was used to define the best kinetic models. The Avrami–Erofeev (Am=2, 3 and 4) and R1 and R2 models presented good agreement with experimental data, as well as, linear correlation coefficient (r) and standard deviation (s).

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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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