Search results for "Quartz wool"

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MODELING OF A TiO2-COATED QUARTZ -WOOL PACKED-BED PHOTOCATALYTIC REACTOR

2010

A fixed-bed, photocatalytic laboratory reactor aimed to degrade pollutants from water streams was designed and built. Quartz wool coated with a thin film of TiO2 was employed as the reactor filling. The photocatalyst was placed in the reactor forming a loose packing to guarantee the intimate contact among reactants, photons, and the photocatalytic surface. This reactor was employed to study the photocatalytic decomposition of a model pollutant (formic acid). A reactor–radiation–reaction model was developed, which was comprised of the reactor mass balance, radiation model, and kinetic model for the degradation of formic acid. The local superficial rate of photon absorption, which was necessa…

Packed bedSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciChemistryIngeniería de Procesos QuímicosProcess Chemistry and TechnologyQuartz woolSettore ING-IND/25 - Impianti Chimicipacked-bed reactor quartz wool photocatalysis TiO2 kinetics formic acid.Kinetic schemeMineralogyINGENIERÍAS Y TECNOLOGÍASKinetic energyCatalysisIngeniería QuímicaChemical engineeringMass transferPacked-bed reactorPhotocatalysisTiO2FiberPhysics::Chemical PhysicsPhotocatalysisPlug flow reactor modelAbsorption (electromagnetic radiation)General Environmental Science
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Radiation model of a TiO2-coated, quartz wool, packed-bed photocatalytic reactor

2010

The radiation field of a packed-bed photocatalytic reactor filled with quartz wool coated with titanium dioxide was modeled using the Monte Carlo technique and the following information: the radiation flux emitted by the lamps, the diameter size distribution of the quartz fiber cloth, the mass of quartz fibers and of TiO2 that was immobilized on the fiber surface as well as the refractive index and the spectral absorption coefficient of the materials of the system. Modeling predictions were validated with radiometer measurements of the transmitted radiation through the reactor, the root mean square error being < 9.7%. Finally, by means of a parametric study, the validated model was used to …

Packed bedSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciEnvironmental EngineeringEnergy distributionMaterials scienceRadiation modelpacked-bed reactor photocatalysis radiation modeling quartz wool Monte CarloSettore ING-IND/25 - Impianti ChimiciGeneral Chemical EngineeringMineralogypacked-bed reactorINGENIERÍAS Y TECNOLOGÍASradiation modelingIngeniería QuímicaWoolquartz woolphotocatalysisQuartzBiotechnologyNuclear chemistryAIChE Journal
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