Kinetic analysis of thermal degradation of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis from timber industry

Abstract: Thermal analysis is a powerful tool to predict the composition and thermal stability of different materials. In this work, thermogravimetric analysis of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis was carried out at four different heating rates (5°C·min-1, 10°C·min-1, 20°C·...

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Autores principales:	Cavinato,Camily Daiane, Poletto,Matheus
Lenguaje:	English
Publicado:	Universidad del Bío-Bío 2021
Materias:	Activation energy Criado method Flynn-Wall-Ozawa thermogravimetry thermal stability.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2021000100446
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spelling	oai:scielo:S0718-221X20210001004462021-07-07Kinetic analysis of thermal degradation of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis from timber industryCavinato,Camily DaianePoletto,Matheus Activation energy Criado method Flynn-Wall-Ozawa thermogravimetry thermal stability. Abstract: Thermal analysis is a powerful tool to predict the composition and thermal stability of different materials. In this work, thermogravimetric analysis of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis was carried out at four different heating rates (5°C·min-1, 10°C·min-1, 20°C·min-1 and 40°C·min-1) in a non-isothermal condition. The degradation kinetics was evaluated based on Flynn-Wall-Ozawa and Criado methods. The half-life time of wood degradation reaction was also studied. The wood thermal degradation process in an oxidizing atmosphere can be divided in dehydration, devolatilization, and combustion. The kinetic results revels apparent activation energy values of 130-240 kJ·mol-1 for Tectona grandis, 150-191 kJ·mol-1 for Marmaroxylon racemosum and 188-205 kJ·mol-1 for Cedrela odorata, when conversion values ranged from 0,1-0,5. The most probable degradation mechanism for wood species studied is a diffusion model based on a three-dimensional diffusion. Cedrela odorata presented the lowest reaction half-life time while Marmaroxylon racemosum showed the highest. On the basis of these results, it can be concluded that Flynn-Wall-Ozawa and Criado methods associated with half-life time of reaction may contribute to better understand the wood degradation before use it in polymer composites.info:eu-repo/semantics/openAccessUniversidad del Bío-BíoMaderas. Ciencia y tecnología v.23 20212021-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2021000100446en10.4067/s0718-221x2021000100446
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Activation energy Criado method Flynn-Wall-Ozawa thermogravimetry thermal stability.
spellingShingle	Activation energy Criado method Flynn-Wall-Ozawa thermogravimetry thermal stability. Cavinato,Camily Daiane Poletto,Matheus Kinetic analysis of thermal degradation of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis from timber industry
description	Abstract: Thermal analysis is a powerful tool to predict the composition and thermal stability of different materials. In this work, thermogravimetric analysis of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis was carried out at four different heating rates (5°C·min-1, 10°C·min-1, 20°C·min-1 and 40°C·min-1) in a non-isothermal condition. The degradation kinetics was evaluated based on Flynn-Wall-Ozawa and Criado methods. The half-life time of wood degradation reaction was also studied. The wood thermal degradation process in an oxidizing atmosphere can be divided in dehydration, devolatilization, and combustion. The kinetic results revels apparent activation energy values of 130-240 kJ·mol-1 for Tectona grandis, 150-191 kJ·mol-1 for Marmaroxylon racemosum and 188-205 kJ·mol-1 for Cedrela odorata, when conversion values ranged from 0,1-0,5. The most probable degradation mechanism for wood species studied is a diffusion model based on a three-dimensional diffusion. Cedrela odorata presented the lowest reaction half-life time while Marmaroxylon racemosum showed the highest. On the basis of these results, it can be concluded that Flynn-Wall-Ozawa and Criado methods associated with half-life time of reaction may contribute to better understand the wood degradation before use it in polymer composites.
author	Cavinato,Camily Daiane Poletto,Matheus
author_facet	Cavinato,Camily Daiane Poletto,Matheus
author_sort	Cavinato,Camily Daiane
title	Kinetic analysis of thermal degradation of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis from timber industry
title_short	Kinetic analysis of thermal degradation of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis from timber industry
title_full	Kinetic analysis of thermal degradation of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis from timber industry
title_fullStr	Kinetic analysis of thermal degradation of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis from timber industry
title_full_unstemmed	Kinetic analysis of thermal degradation of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis from timber industry
title_sort	kinetic analysis of thermal degradation of cedrela odorata, marmaroxylon racemosum and tectona grandis from timber industry
publisher	Universidad del Bío-Bío
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2021000100446
work_keys_str_mv	AT cavinatocamilydaiane kineticanalysisofthermaldegradationofcedrelaodoratamarmaroxylonracemosumandtectonagrandisfromtimberindustry AT polettomatheus kineticanalysisofthermaldegradationofcedrelaodoratamarmaroxylonracemosumandtectonagrandisfromtimberindustry
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Kinetic analysis of thermal degradation of Cedrela odorata, Marmaroxylon racemosum and Tectona grandis from timber industry

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