| 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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Govin, Alexandre
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (30/30 displayed)
- 2022Effect of different retarders and their combination with superplasticizer on the properties of CSA
- 2021Effect of Citric Acid and Polycarboxylate Superplasticizers (PCE) on Hydration and Rheology of Sulfoaluminate Cement
- 2019Hydration and rheology of sulfoaluminate cements (CSA) in presence of polycarboxylate superplasticizers (PCE) and citric acid
- 2019Combination of superplasticizers with hydroxypropyl guar, effect on cement-paste propertiescitations
- 2018Hydration and rheology of sulfoaluminate-belite cements (SAC) in presence of polycarboxylate superplasticizers (PCE) and citric acid
- 2018Impact of a thin coating layer of calcium aluminate and sulfoaluminate cements on algal biofouling
- 2017Experimental study of self-heating phenomenon at the reactor-scale. Safety assessment of a fixed-bed filled with torrefied wood chips
- 2017Effect of guar gum derivatives combined with superplasticizers on properties of portland cement-pastes
- 2017Combination of guar gum derivatives and superplasticizers, impact on properties of Portland cement-pastes
- 2016Experimental study of self-heating phenomena during torrefaction of spherical wood particles
- 2016Development of treatment to prevent the algal biofouling
- 2016Modification of water retention and rheological properties of fresh state cement-based mortars by guar gum derivativescitations
- 2015Impact of Guar Gum Derivatives on Properties of Freshly-Mixed Cement-Based Mortars
- 2015Effect of the Chemical Composition of Building Materials on Algal Biofouling
- 2015Modification of fresh state properties of Portland cement-based mortars by guar gum derivatives
- 2015Effect of Guar Gum Derivatives on Fresh State Properties of Portland Cement-Based Mortars
- 2014Influence of the chemical composition of mortars on algal biofouling
- 2014Lifetime durability of bio-based composites
- 2014Development of an accelerated test of fungal biodeterioration. Application to calcium aluminate cements
- 2014Synthesis and Fluidization of Wood Powders Application to biofuel production
- 2014Influence of hydroxypropylguars on rheological behavior of cement-based mortarscitations
- 2013NMR investigations of water retention mechanism by cellulose ethers in cement-based materials
- 2012Nuclear magnetic relaxation dispersion investigations of water retention mechanism by cellulose ethers in mortarscitations
- 2010Energy requirement for fine grinding of torrefied woodcitations
- 2009Effect of cellulose ethers on water retention in freshly-mixed mortars
- 2009Effect of torrefaction on grinding energy requirement for thin wood particle production
- 2009Influence of cellulose ether particle size on water retention of freshly-mixed mortars
- 2008Water transport in freshly-mixed mortars containing cellulose ethers
- 2007Study of efflorescence forming process on cementitious materials // Etude du processus de formation des efflorescences sur des matériaux cimentaires
- 2007Structural transformations of bioactive glass 45S5next term with thermal treatmentscitations
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 ...