Oxidative Pyrolysis of a Large Wood Particle: Effects of Oxygen Concentration and of Particle Size

Abstract : In this study, the oxidative pyrolysis of large pine wood particles was analysed using a Macro-ThermoGravimetric apparatus (Macro-TGA). The effects of the concentration of oxygen in the surrounding gas and of particle size were investigated. Three different oxygen concentrations (0 %, 10 % and 20 %) and three sizes of cylindrical pine wood samples (4 mm, 8 mm and 12 mm in diameter) were tested at a heating rate of 20 degrees C/min. The results showed that oxygen had a strong influence on pyrolysis behaviour. We observed that the peak of wood pyrolysis was higher and appeared at a lower temperature with an increase in the oxygen concentration. When the size of the particle was increased, there was a short delay in DTG curve. But generally speaking, particle size had no significant influence on oxidative pyrolysis at this low heating rate. With the 4 mm diameter particles and at a heating rate of 20 degrees C/min, degradation behaviours (TG and DTG curves) were similar and resembled intrinsic degradation behaviours: heat and mass transfer phenomena did not limit the process.
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https://hal.archives-ouvertes.fr/hal-01625033
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Submitted on : Friday, October 27, 2017 - 9:43:54 AM
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Elias Daouk, Laurent Steene, Frederic Paviet, Sylvain Salvador. Oxidative Pyrolysis of a Large Wood Particle: Effects of Oxygen Concentration and of Particle Size. ICONBM – International Conference on Biomass, Pts 1 and 2, May 2014, Florence, Italy. p.73-78, ⟨10.3303/CET1437013⟩. ⟨hal-01625033⟩

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