arXiv subjects

Orfan Zahraa

Publications and source records attributed to Orfan Zahraa.

3 recordsLinked to original sources

arXiv2009

Réduction de la nuisance olfactive par oxydation photocatalytique

Heterogeneous photocatalysis is an interesting alternative for the purification, decontamination and smell abatment of air. In the present work, the photocatalytic oxidation of 2-butanone (MEK : methyl ethyle ketone) is investigated, this low molecular mass product being the source of serious smell pollution. The influence of light and of the pollutant concentration were investigated in an annular photoreactor. As most VOC's, the degradation rate of MEK follows a Langmuir-Hinshelwood type law. Intermediate products were analysed by GC-MD ; acetaldehyde is the dominant byproduct of the photocatalytic oxidation.

physics.chem-ph↗

arXiv2009

Caractérisation de réacteurs photocatalytiques utilisés pour le traitement de l'air

Photocatalysis is often used in air purification. Photocatalytic degradation od VOC's has been investigated in a number of devices. An optimisation of this process requires a chracterisation of the reactor : in a first step the gas flow behaviour has to be studied (plug flow, CSTR,...) by RTD analysis; then, chemical kinetics have to be determined as a function ot the relevant parameters (space time, relative humidity, concentrations, etc). All the data collected lead to a reliable design of the equipment.

physics.chem-ph↗

arXiv2009

Tylosin abatement in water by photocatalytic process

The photocatalytic degradation of tylosin has been studied using immobilized titanium dioxide as catalyst. T he processes of degradation and reduction of tylosin was examined, and the activity is dominantly dependent on the surface coverage of the catalysts, The Langmuir-Hinshelwood model is satisfactorily obeyed at initial time and in the course of the reaction. These results suggest the feasibility of a photocatalytic system on the elimination of such antibiotic.

physics.chem-ph↗