| People | Locations | Statistics |
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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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Arlabosse, Patricia
IMT Mines Albi
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2021Rheological characterization of sludge in divided granular-like and pasty states using a granular rheometercitations
- 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
- 2017A uniaxial cyclic compression method for characterizing the rheological and textural behaviors of mechanically dewatered sewage sludgecitations
- 2016Experimental study of self-heating phenomena during torrefaction of spherical wood particles
- 2011Production of green juice with an intensive thermo-mechanical fractionation process. Part II: Effect of processing conditions on the liquid fraction propertiescitations
- 2008Thermally assisted mechanical dewatering (TAMD) of suspensions of fine particles: Analysis of the influence of the operating conditions using the response surface methodologycitations
- 2004Method for the Design of a Contact Dryer-Application to Sludge Treatment in Thin Film Boiling
- 2004Method for the Design of a Contact Dryer-Application to Sludge Treatment in Thin Film Boiling
Places of action
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conferencepaper
Experimental study of self-heating phenomenon at the reactor-scale. Safety assessment of a fixed-bed filled with torrefied wood chips
Abstract
Theme: Particulate Solids - ISBN Abastract BOOK: 978-84-697-8629-1 ; International audience ; In order to circumvent the weak fuel properties of raw biomass, pretreatments are commonly applied. For example, the thermochemical process called torrefaction upgrades these weaknesses and helps the large scale development of the biomass-to-energy sector. However, the production scale up of torrefied materials rises hazard and risk issues related to self-heating. Indeed, it can lead to self-ignition if thermal runaway occurs. Self-ignition of torrefied materials has been suspected at the industrial scale and experienced in laboratories. The objective of this paper is to study the self-heating of torrefied wood in a fixed bed reactor and evaluate the influence of the torrefaction severity, the velocity and the oxygen content of the heat transfer fluid. Self-heatings without thermal runaway were generated by introducing air between 100 and 140°C at 30 NL.min -1 . When the anhydrous weight loss of torrefaction (AWL) goes form 10 to 24% the self-heating speed is more than quadrupled. At 140°C, the mildly and severely torrefied packed beds consume 30 and 150 NmL.min -1 .kg -1 of oxygen and produce 15 and 30 NmL.min -1 .kg -1 of carbon oxides, respectively. Thermal runaway occurs at 160 and 150°C for mildly and severely torrefied packed beds, respectively. During this phenomenon, the self-heating speed, the consumption of oxygen and the production of carbon oxides increase sharply.The exothermic reaction consumes more oxygen than it produces carbon oxides on a molar basis, which suggests an adsorption mechanism pathway. We bring evidence that the severity of torrefaction enhances self-heating and self-ignition propensity. We suppose that the thermal degradation of crystalline cellulose provides new available sites for oxygen adsorption and steps up the exothermic reaction rate. Surprisingly, the ratio between oxygen consumed and carbon oxides produced rises from 2 to 5 when the torrefaction severity increase. We assume that ...