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RESEARCH PRODUCT
Original Supercritical Water Device for Continuous Production of Nanopowders
Romain PioletMostapha ArianeFrédéric DemoissonFrédéric Bernardsubject
Aqueous solutionMaterials scienceMetallurgyMixing (process engineering)NanoparticleCondensed Matter PhysicsResidence time (fluid dynamics)Supercritical fluidContinuous productionMetalchemistry.chemical_compoundchemistryChemical engineeringvisual_artvisual_art.visual_art_mediumHydroxideGeneral Materials Sciencedescription
Well-crystallized ZnO, ZrO2, TiO2, CeO2, Y2O3 and La2O3 nanoparticles are synthesized under supercritical water conditions (T > 647 K and P > 22.1 MPa) using a home-made continuous process. At room temperature, metallic salts with or without aqueous hydroxide solution (KOH or NaOH) are pressurized to 25–30 MPa. Then, the reactant(s) is/are rapidly heated to 673–773 K by mixing with the supercritical water in a patented reactor. Residence time is in the range from 2 to 8 s. XRD, TEM and surface area analyses highlight the production of pure and well-crystallized nanoparticles with a uniform size distribution.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-04-11 | Advanced Engineering Materials |