TY - JOUR
T1 - Behavior of wood during the thermal transition between torrefaction and pyrolysis
T2 - chemical and physical modifications.
AU - Colin, Baptiste
AU - Quirino, Rafael L.
AU - Ntsika-Mbou, Christ Y.
AU - Lin, Yu Ying
AU - Lin, Bo Jhih
AU - Leconte, François
AU - Petrissans, Anelie
AU - Chen, Wei Hsin
AU - Petrissans, Mathieu
N1 - Publisher Copyright:
© 2021 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2023
Y1 - 2023
N2 - Despite the wealth of physical and chemical information available about wood torrefaction and pyrolysis, very few studies to date have focused on the transition between these two processes. It has been experimentally determined, however, that torrefaction and pyrolysis lead to very different products, indicating a change in their degradation chemistry. There exists, therefore, a need to investigate this transition between torrefaction and pyrolysis from a chemical perspective, very useful for the development of kinetic models. This study focuses on investigating thermogravimetric analysis, shrinkage, flexural strength, total weight loss, of two common industrial European wood species treated at temperatures ranging from 250°C to 400°C. A comparison reveals an obvious change in the degradation of cellulose as a function of treatment temperature that can be correlated with the yield of the main thermal treatment products, such as acetic acid, furfural, CO, H2, etc. At temperatures higher than 350°C, all wood components are extensively degraded. In conclusion, this study indicates a deep modification during the transition between torrefaction and pyrolysis. The results obtained in this study help establish specific temperature ranges, based on wood component degradation, that can be used in the refinement of kinetic models for wood thermal treatment. It is envisioned that, due to the sudden change in behavior at temperatures covering a range between torrefaction and soft pyrolysis, an adequate model with distinct stages is required. Ultimately, this study aims at defining, based on TGA, DTG, mechanical testing, color/appearance, and dimensional change results, the appropriate temperature ranges to be used in the refinement of unique kinetic models that contemplate the degradation of wood components.
AB - Despite the wealth of physical and chemical information available about wood torrefaction and pyrolysis, very few studies to date have focused on the transition between these two processes. It has been experimentally determined, however, that torrefaction and pyrolysis lead to very different products, indicating a change in their degradation chemistry. There exists, therefore, a need to investigate this transition between torrefaction and pyrolysis from a chemical perspective, very useful for the development of kinetic models. This study focuses on investigating thermogravimetric analysis, shrinkage, flexural strength, total weight loss, of two common industrial European wood species treated at temperatures ranging from 250°C to 400°C. A comparison reveals an obvious change in the degradation of cellulose as a function of treatment temperature that can be correlated with the yield of the main thermal treatment products, such as acetic acid, furfural, CO, H2, etc. At temperatures higher than 350°C, all wood components are extensively degraded. In conclusion, this study indicates a deep modification during the transition between torrefaction and pyrolysis. The results obtained in this study help establish specific temperature ranges, based on wood component degradation, that can be used in the refinement of kinetic models for wood thermal treatment. It is envisioned that, due to the sudden change in behavior at temperatures covering a range between torrefaction and soft pyrolysis, an adequate model with distinct stages is required. Ultimately, this study aims at defining, based on TGA, DTG, mechanical testing, color/appearance, and dimensional change results, the appropriate temperature ranges to be used in the refinement of unique kinetic models that contemplate the degradation of wood components.
KW - Biomass
KW - chemical modification
KW - mechanical resistance
KW - physical modification
KW - shrinkage evaluation
KW - thermal degradation
KW - thermogravimetric analysis
KW - transition zone
UR - http://www.scopus.com/inward/record.url?scp=85121701561&partnerID=8YFLogxK
U2 - 10.1080/17480272.2021.2015434
DO - 10.1080/17480272.2021.2015434
M3 - Article
AN - SCOPUS:85121701561
SN - 1748-0272
VL - 18
SP - 244
EP - 253
JO - Wood Material Science and Engineering
JF - Wood Material Science and Engineering
IS - 1
ER -