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Thermal modification kinetics and chemistry of poplar wood in dry and saturated steam media

Type
Articles dans des revues avec comité de lecture
Author
MARCON, Bertrand
127742 Laboratoire Bourguignon des Matériaux et Procédés [LABOMAP]
TONDI, Gianluca
1006576 Salzburg University of Applied Sciences = Fachhochschule Salzburg [FHS]
301093 Universita degli Studi di Padova
PROCINO, Lorenzo
34601 Université de Florence
GOLI, Giacomo
34601 Université de Florence
1003584 Department of Agriculture, Food, Environment and Forestry [DAGRI]

URI
http://hdl.handle.net/10985/19786
DOI
10.1515/hf-2020-0166
Date
2021
Journal
Holzforschung

Abstract

This research work presents a modelling strategy to analyse thermal conversion rates of two thermal wood modification processes based on time-temperature superposition method. It gathers in a single study different original and bibliographic experimental works analysing the dry mass variation that occurs during thermal and hydro-thermal wood modification processes. The mass loss kinetic was successfully modelled using a modified Arrhenius approach. The time-temperature superposition method allowed to define for each wood modification process a master curve and its time shift depending on the treatment temperature. The analysis of ventilated oven and saturated steam treatments pointed out the existence of a continuous single kinetic for the ventilated oven which became more complex for saturated steam since a second kinetic stage appeared. This kinetic difference was sustained by infrared spectra chemical analysis which showed that hemicelluloses degraded much faster in presence of steam while lignin degradation occurred in both conditions.

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