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Etude du comportement des espèces inorganiques dans une installation de gazéification de la biomasse : condensation des aérosols et dépôts

Martin Petit 1
1 Procédés élaboration
LITEN - Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux, IJL - Institut Jean Lamour
Abstract : The aim of this work is to analyse theoretically and experimentally inorganic species condensation in a biomass gasification facility. During biomass gasification, some inorganic species are volatilised and then condense when the syngas cools down. These species can spoil the facility and thus have to be removed before the biodiesel synthesis. First, a thermodynamic study described the nature and distribution of inorganic species either volatilised during biomass gasification or condensed during cooling. Then, an aerosol condensation model for biomass gasification has been developed using a mathematical description of the different phenomena involved (nucleation, growth, agglomeration, deposition). Meanwhile, an experimental device (ANACONDA) has been built and qualified. This device was used to analyse KCl condensation on graphite particles as the gas cooled at 1000 K/s. Experimental results showed nucleation of new KCl particles during the cooling, KCl condensation on graphite particles and deposition of KCl and particles on walls. KCl condensation causes an increase in graphite particle aerodynamic diameter. Graphite particles prevent wall deposit of KCl, which decreased from 40% to 25%. From the comparison of simulation and experimental results, the various phenomena could be quantified and the model validated. Finally, the model was used to propose solutions for limiting inorganic deposit on exchanger walls in a biomass-gasification industrial facility.
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  • HAL Id : tel-00661069, version 1

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Martin Petit. Etude du comportement des espèces inorganiques dans une installation de gazéification de la biomasse : condensation des aérosols et dépôts. Génie des procédés. Institut National Polytechnique de Lorraine - INPL, 2011. Français. ⟨tel-00661069⟩

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