Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 87: Issue 3
Kinetics study of norbixin’s first stage thermal decomposition, using dynamic method
Authors:
Gerlania Silva Univ. Federal da Paraíba, UFPB Departamento de Engenharia de Alimentos, CT João Pessoa Brazil CEP 58059-900 Paraíba João Pessoa Brazil CEP 58059-900 Paraíba

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A. Souza Univ. Federal da Paraíba Departamento de Química, CCEN João Pessoa Brazil CEP 58059-900 Paraíba João Pessoa Brazil CEP 58059-900 Paraíba

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J. Botelho Univ. Federal da Paraíba Departamento de Química, CCEN João Pessoa Brazil CEP 58059-900 Paraíba João Pessoa Brazil CEP 58059-900 Paraíba

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M. Silva Univ. Federal da Paraíba Departamento de Química, CCEN João Pessoa Brazil CEP 58059-900 Paraíba João Pessoa Brazil CEP 58059-900 Paraíba

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T. Silva IMS-CAT-UFBA Núcleo Complexo Produtivo de Saúde Vitória de Conquista Brazil CEP 45055-090 BA Av. Olívia Flores, 3000, Candeias Vitória de Conquista Brazil CEP 45055-090 BA Av. Olívia Flores, 3000, Candeias

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Pages:
871–874
Online Publication Date:
09 Mar 2007
Publication Date:
01 Mar 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-006-8198-6
Keywords:
kinetic; norbixin; thermal degradation
Restricted access

Abstract  

Cis-norbixin isomer obtained by hydrolysis of cis-bixin and isolated by solvent extraction from annatto seeds. The thermal decomposition data of the cis-norbixin samples were analyzed by thermogravimetric analysis at different heating rates in the 25–900C temperature range. DSC curves showed that thermal decomposition reactions for cis-norbixin occurred in the solid phase. The kinetic parameters, such as activation energy and pre-exponential factor were determined using integral and approximate methods: Coats–Redfern, Madhusudanan, Horowitz–Metzger and Van Krevelen. F1 mechanism describes well the first stage of the thermal decomposition.

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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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