Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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Materials Map under construction

The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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1.080 Topics available

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977 Locations available

693.932 PEOPLE
693.932 People People

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Show results for 693.932 people that are selected by your search filters.

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PeopleLocationsStatistics
Naji, M.
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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 CSAcitations
  • 2021Effect of Citric Acid and Polycarboxylate Superplasticizers (PCE) on Hydration and Rheology of Sulfoaluminate Cementcitations
  • 2019Hydration and rheology of sulfoaluminate cements (CSA) in presence of polycarboxylate superplasticizers (PCE) and citric acidcitations
  • 2019Combination of superplasticizers with hydroxypropyl guar, effect on cement-paste properties25citations
  • 2018Hydration and rheology of sulfoaluminate-belite cements (SAC) in presence of polycarboxylate superplasticizers (PCE) and citric acidcitations
  • 2018Impact of a thin coating layer of calcium aluminate and sulfoaluminate cements on algal biofoulingcitations
  • 2017Experimental study of self-heating phenomenon at the reactor-scale. Safety assessment of a fixed-bed filled with torrefied wood chipscitations
  • 2017Effect of guar gum derivatives combined with superplasticizers on properties of portland cement-pastescitations
  • 2017Combination of guar gum derivatives and superplasticizers, impact on properties of Portland cement-pastescitations
  • 2016Experimental study of self-heating phenomena during torrefaction of spherical wood particlescitations
  • 2016Development of treatment to prevent the algal biofoulingcitations
  • 2016Modification of water retention and rheological properties of fresh state cement-based mortars by guar gum derivatives44citations
  • 2015Impact of Guar Gum Derivatives on Properties of Freshly-Mixed Cement-Based Mortarscitations
  • 2015Effect of the Chemical Composition of Building Materials on Algal Biofoulingcitations
  • 2015Modification of fresh state properties of Portland cement-based mortars by guar gum derivativescitations
  • 2015Effect of Guar Gum Derivatives on Fresh State Properties of Portland Cement-Based Mortarscitations
  • 2014Influence of the chemical composition of mortars on algal biofoulingcitations
  • 2014Lifetime durability of bio-based compositescitations
  • 2014Development of an accelerated test of fungal biodeterioration. Application to calcium aluminate cementscitations
  • 2014Synthesis and Fluidization of Wood Powders Application to biofuel productioncitations
  • 2014Influence of hydroxypropylguars on rheological behavior of cement-based mortars35citations
  • 2013NMR investigations of water retention mechanism by cellulose ethers in cement-based materialscitations
  • 2012Nuclear magnetic relaxation dispersion investigations of water retention mechanism by cellulose ethers in mortars30citations
  • 2010Energy requirement for fine grinding of torrefied wood237citations
  • 2009Effect of cellulose ethers on water retention in freshly-mixed mortarscitations
  • 2009Effect of torrefaction on grinding energy requirement for thin wood particle productioncitations
  • 2009Influence of cellulose ether particle size on water retention of freshly-mixed mortarscitations
  • 2008Water transport in freshly-mixed mortars containing cellulose etherscitations
  • 2007Study of efflorescence forming process on cementitious materials // Etude du processus de formation des efflorescences sur des matériaux cimentairescitations
  • 2007Structural transformations of bioactive glass 45S5next term with thermal treatments318citations

Places of action

Chart of shared publication
Quintero, G.
1 / 1 shared
Belhadi, Rachid
4 / 4 shared
Grosseau, Phillipe
5 / 5 shared
Bartholin, Marie-Claude
7 / 7 shared
Schmidt, Wolfram
3 / 57 shared
Grosseau, Philippe
17 / 33 shared
Lors, Christine
4 / 14 shared
Damidot, Denis
4 / 16 shared
Evangelista, Brieuc
2 / 2 shared
Dirion, Jean-Louis
2 / 5 shared
Arlabosse, Patricia
2 / 9 shared
Bonnefoy, Olivier
3 / 8 shared
Salvador, Sylvain
2 / 10 shared
Weiss-Hortala, Elsa
1 / 16 shared
Vallet, Jessie
1 / 1 shared
Biasotti, Barbara
3 / 3 shared
Giudici, Max
3 / 3 shared
Langella, Valentina
3 / 3 shared
Guyonnet, René
6 / 8 shared
Dalod, Estelle
2 / 2 shared
Gaudin, Solène
1 / 1 shared
Commereuc, Sophie
1 / 16 shared
Delor-Jestin, Florence
1 / 8 shared
Verney, Vincent
1 / 37 shared
Askanaian, Haroutioun
1 / 2 shared
Albuquerque, Iolanda
1 / 1 shared
Sanz, Elena
1 / 1 shared
Andreux, Régis
1 / 1 shared
Nastoll, Willi
1 / 1 shared
Almendros, Mélanie
1 / 1 shared
Poinot, Thomas
1 / 1 shared
Patural, Laetitia
5 / 5 shared
Korb, Jean-Pierre
2 / 2 shared
Devès, Olivier
1 / 1 shared
Ruot, Bertrand
4 / 5 shared
Rolland, Mathieu
2 / 2 shared
Repellin, Vincent
2 / 2 shared
Deves, Olivier
2 / 2 shared
Duplan, Jean-Luc
1 / 1 shared
Pourchez, Jérémie
1 / 5 shared
Guilhot, Bernard
1 / 9 shared
Delair, Stéphanie
1 / 1 shared
Gremillard, Laurent
1 / 39 shared
Lefebvre, Leila
1 / 4 shared
Thollet, Gilbert
1 / 3 shared
Zenati, Rachid
1 / 3 shared
Chevalier, Jérome
1 / 49 shared
Bernache-Assollant, Didier
1 / 15 shared
Chart of publication period
2022
2021
2019
2018
2017
2016
2015
2014
2013
2012
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Co-Authors (by relevance)

  • Quintero, G.
  • Belhadi, Rachid
  • Grosseau, Phillipe
  • Bartholin, Marie-Claude
  • Schmidt, Wolfram
  • Grosseau, Philippe
  • Lors, Christine
  • Damidot, Denis
  • Evangelista, Brieuc
  • Dirion, Jean-Louis
  • Arlabosse, Patricia
  • Bonnefoy, Olivier
  • Salvador, Sylvain
  • Weiss-Hortala, Elsa
  • Vallet, Jessie
  • Biasotti, Barbara
  • Giudici, Max
  • Langella, Valentina
  • Guyonnet, René
  • Dalod, Estelle
  • Gaudin, Solène
  • Commereuc, Sophie
  • Delor-Jestin, Florence
  • Verney, Vincent
  • Askanaian, Haroutioun
  • Albuquerque, Iolanda
  • Sanz, Elena
  • Andreux, Régis
  • Nastoll, Willi
  • Almendros, Mélanie
  • Poinot, Thomas
  • Patural, Laetitia
  • Korb, Jean-Pierre
  • Devès, Olivier
  • Ruot, Bertrand
  • Rolland, Mathieu
  • Repellin, Vincent
  • Deves, Olivier
  • Duplan, Jean-Luc
  • Pourchez, Jérémie
  • Guilhot, Bernard
  • Delair, Stéphanie
  • Gremillard, Laurent
  • Lefebvre, Leila
  • Thollet, Gilbert
  • Zenati, Rachid
  • Chevalier, Jérome
  • Bernache-Assollant, Didier
OrganizationsLocationPeople

conferencepaper

Synthesis and Fluidization of Wood Powders Application to biofuel production

  • Sanz, Elena
  • Andreux, Régis
  • Nastoll, Willi
  • Govin, Alexandre
  • Guyonnet, René
  • Almendros, Mélanie
  • Bonnefoy, Olivier
Abstract

Synthesizing fuels from biomass sounds a promising path to reduce the overall green house gases emissions and replace the oil-based fuels. Among the main conversion routes, i.e. biological and thermochemical, the latter presents the advantage of being in the continuation of traditional process engineering, thus more inclined to be rapidly industrialized. Here, we investigate two key points of the process consisting in the transformation of solid wood into suitably sized particles, their transport and injection into an entrained flow gasifier and the Fischer-Tropsch conversion of the resulting syngas in liquid fuel. Because of the very large elasticity of ligno-cellulosic materials, the size reduction by grinding requires too much energy to be economically competitive. In order to increase the wood fragility, and thus decrease the energy consumption, the biomass is preliminarily torrefied (i.e. heated up to 300°C under inert atmosphere). In this section, we present new results correlating the required specific energy, the size of the grid holes used in the knife-mill, the torrefaction intensity and the resulting particle size. For two types of wood (beech for hard wood and spruce for softwood), it is evidenced that the grinding energy decreases exponentially when the particle size increases. Both the prefactor and the characteristic length linearly decrease when the torrefaction becomes more severe. The anisotropic microstructure of ligno-cellulosic materials is the cause of the elongated particles morphology. The poor flowability associated with this particle shape makes the pneumatic transport and injection problematic, which is clearly an obstacle to the industrialization of the process. Indeed, to avoid jamming, larger flow rates of inert gas must be used to convey the particles, with an increasing cost of gas separation at later stages. Here, we present new experimental results showing how flowability is modified by the particles size and shape, which in turn depend on the wood species and the torrefaction intensity. Due to its complex nature, the flowability is characterized in three configurations. The jammed-unjammed threshold is evaluated by shear tests performed on a packed bed. The dense quasistatic flowability is evaluated using a powder rheometer that measures the energy required by a rotating blade to circulate through the bed. The fluidization ability is evaluated at two different scales: in the powder rheometer in presence of an upwards air flow and in a standard fluidization column. Results show that the flowability of torrefied wood particles is very poor and very dependent on the wood species (hardwood or softwood). Due to particles interlocking, the bed is highly porous. This is evidenced by the pressure drop which is about 4 times smaller than expected by the Wu & Yen correlation for compact particles of same size. Also, this interlocking is the cause of an apparent cohesivity, which manifests itself by a channeling tendency and a minimum fluidization velocity about 5 to 10 times larger than expected by the Wu & Yen correlation. The significant difference between spruce and beech flowability is attributed to the particles morphology.

Topics
  • porous
  • impedance spectroscopy
  • grinding
  • anisotropic
  • shear test
  • elasticity
  • wood
  • particle shape