REACTIVITE CHIMIQUE EN MILIEUX FLUIDES SUPERCRITIQUES. CHIMIE POUR UN DEVELOPPEMENT DURABLE
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1 RECTIVITE CHIMIQUE EN MILIEUX FLUIDES SUPERCRITIQUES. CHIMIE POUR UN DEVELOPPEMENT DURBLE C. YMONIER, M. MJIMEL,. SERNI, F. CNSELL ICMCB-CNRS 87, avenue du Dr lbert Schweitzer Pessac cedex Tél. : +33 (0) Fax : +33 (0) / Group Supercritical Fluids E.mail: aymonier@icmcb-bordeaux.cnrs.fr
2 Institut de Chimie de la Matière Condensée de Bordeaux SOLID STTE CHEMISTRY MTERILS SCIENCE ND TECHNOLOGY MOLECULR SCIENCES 230 RESERCHERS Director : Dr Claude DELMS ICMCB-CNRS 87, avenue du Dr lbert Schweitzer Pessac cedex Tél. : +33 (0) Fax : +33 (0) E.mail directeur : dr@icmcb.u-bordeaux1.fr
3 ICMCB RESERCH GROUPS N N O M T E R I L S D V N C E D M T E R I L S CTLYSIS, ENERGY, MICROELECTRONIC, SNTE ENVIRONMENT ND SUSTINBLE DEVELOPMENT
4 TEM CHEMISTRY IN SUPERCRITICL FLUIDS CHEMISTRY IN SUPERCRITICL FLUIDS FOR DVNCED NNOSTRUCTURED MTERILS Multifunctional nanomaterials Nano-engineering of materials surface Nanostructuration in volume ENVIRONMENT Waste management Biomass liquefaction and gazeification TECHNOLOGY TRNSFER 18 PERSONS
5 Pressure SUPERCRITICL FLUID? Liquid Supercritical fluid Solid Critical point Gaz Gaz Temperature
6 SUPERCRITICL FLUID? One Substance - many different Solvents Small pressure changes - Density varies from LIQUID-LIKE (good solvent) to GS-LIKE (no solvent at all) Volatile solvents that just go away when pressure is decreased Liquid density, but mix completely with gases (H 2,O 2 ) Low viscosity, high diffusivity Low surface tension
7 SUPERCRITICL FLUIDS ND ENVIRONMENT Supercritical water oxidation (SCWO) 5 patents, 15 papers
8 SUPERCRITICL FLUIDS ND ENVIRONMENT RESULTTS Déchets Liquides Organiques (5 à 15%) + Eau (85 à 95%) Thermochimie - Récupération d énergie Thermodynamique - Séparation des gaz Echangeur Economiseur Refroidisseur Production de vapeur Vanne de détente 25 C 25 C CO 2 Eau Cinétiques et Mécanismes Réactionnels - Dimensionnement - Sous produits O 2 Pompe 250 bars Injections d O C 250 bars R E C T E U R S 250 C 300 C 300 C 400 C 400 C 550 C 250 bars 1 bar Minéraux Technologie des réacteurs - Nouveaux concepts - Matériaux - Simulation Pompe / Compresseur Oxygène 300 bars Pompe 250 bars BIOMSS GZEIFICTION ND LIQUEFCTION
9 SUPERCRITICL FLUIDS ND DVNCED NNOSTRUCTURED MTERILS Particle design based on physical transformation Particle design based on chemical transformation SCF + Solute SCF + Reagents Chemical reaction ORGNIC PRTICLE DESIGN Size, morphology, structure Pharmaceutical industry Food industry Pigment industry INORGNIC PRTICLE DESIGN Size, morphology, structure, composition
10 SUPERCRITICL FLUIDS ND DVNCED NNOSTRUCTURED MTERILS Chemical transformation in supercritical fluids Nanopowders of oxides, metals, semiconductors or nitrides TOWRDS MORE COMPLEX NNOBRICKS Nanowires, nanorods, CNTs Hybrid organic / inorganic nanoparticles Nanocomposites by nanostructuration on surface or in volume of materials NNOSTRUCTURED MTERILS WITH SPECIFIC PROPERTIES Catalysis, Microelectronic and Energy
11 SUPERCRITICL FLUIDS ND DVNCED NNOSTRUCTURED MTERILS Functional Pd nanoparticles for catalysis Supported nanoparticles pplication to hydrogen storage N ± 1.0 nm 10 0 Size (nm) nm JCS 2007 Core-shell nanoparticles for nanostructured ceramics pplication to microelectronic Nanotech nm nm J. Nanosci. Nanotech 2005
12 CONCLUSIONS SCF : INTERESTING MEDI FOR CHEMISTRY SCF ND ENVIRONMENT SCF ND DVNCED NNOSTRUCTURED MTERILS SCF ND SUSTINBLE DEVELOPMENT
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