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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Salvador, Sylvain
Institut Mines-Télécom
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2017Experimental study of self-heating phenomenon at the reactor-scale. Safety assessment of a fixed-bed filled with torrefied wood chips
- 2017Quantification of the torrefaction effects on the grindability and the hygroscopicity of wood chipscitations
- 2017Biomass Chars: The Effects of Pyrolysis Conditions on Their Morphology, Structure, Chemical Properties and Reactivitycitations
- 2016Experimental study of self-heating phenomena during torrefaction of spherical wood particles
- 2016Biomass gasification under high solar heat flux: Experiments on thermally thick samplescitations
- 2015The effects of textural modifications on beech wood-char gasification rate under alternate atmospheres of CO2 and H2Ocitations
- 2015The effects of textural modifications on beech wood-char gasification rate under alternate atmospheres of CO2 and H2Ocitations
- 2006The catalytic effect of vanadium on the reactivity of petcokes with O2 and NO
- 2004The Catalytic Effect of Vanadium on the Reactivity of Petroleum Cokes with NOcitations
- 2000A semi-mobile flash dryer/calciner unit to manufacture pozzolana from raw clay soils - application to soil stabilisationcitations
Places of action
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article
Quantification of the torrefaction effects on the grindability and the hygroscopicity of wood chips
Abstract
International audience ; In the field of biomass torrefaction, lots of product properties have been widely investigated at the lab scale but some uncertainties remain about the gains in terms of grindability and hygroscopicity of torrefied products. In this study, beech wood chips (with an initial moisture content of 10-12%) have been torrefied in a pilot-scale rotary kiln. The torrefaction severity was controlled by adjusting the temperature, the treatment duration and the solid hold-up in the kiln. Mass losses ranging between 1.7% and 25% have been obtained. Properties of torrefied wood chips were then analyzed in terms of composition, heat content, hygroscopicity and grinding energy requirement. Dynamic vapor sorption measurements show that a minimum of hygroscopicity is reached for a mass loss (ML) between 1.7 and 7.8%. The moisture uptakes for mass losses above this optimum remain stable at values twice lower than that of raw biomass. Finally, a new method is proposed to estimate the grindability of wood chips. This method takes into account the grinding energy consumption and the particle size distribution of ground samples. A reduction by a factor of 6.3 of the apparent specific surface grinding energy is observed between a moisture content of 41% and the dryness. This energy measurement is in turn reduced by a further factor of 8.1 after torrefaction with a 25% mass loss.