Combination of non-thermal plasma and hetergeneous catalysis for paracetamol degradation in water

International audienceMany researches for the abatement of aqueous pharmaceutical pollutants in water by Advanced Oxidation Processes (AOPs), including electrical discharge plasmas, have been performed in the last decade. In the present study, non-thermal plasma coupled to catalyst was used for the degradation of paracetamol in water. The plasma was produced in a reactor consisting in a multiple needle-to-plate DBD discharge configuration, while catalyst is a metal oxide based catalyst. In order to investigate the influence of the oxide nature, various home-made catalysts (iron or manganese-based), prepared by wet impregnating method, were tested. Comparisons of the results with or without catalyst on the paracetamol degradation and the physico-chemistry of the treated liquids were done, and they showed that the iron-based catalyst presented better results in terms of conversion and mineralization. Concretely, coupling this catalyst to non-thermal plasma, after 30 min of treatment, the paracetamol conversion is 78 % with 45 % mineralization, against 51% and 3% respectively with plasma alone. The paracetamol degradation as a function of the treatment duration was investigated with this catalyst

Non thermal plasma assisted catalysis of methanol oxidation on Mn, Ce and Cu oxides supported on γ-Al 2 O 3

International audienc

Methanol oxidation in dry and humid air by dielectric barrier discharge plasma combined with MnO2–CuO based catalysts

International audienc

Evaluating Different Strategies to Minimize cold-start Emissions from Gasoline Engines in steady-state and Transient Regimes

International audienceExhaust car emissions increase significantly at particular gasoline engine driving cycle such as cold-start when the three-way catalyst has not reached its light-off temperature. More efficient technologies are needed to reduce these extra emissions. This study focuses on comparing two strategies to lower cold-start pollutants on a commercial monolithic catalyst: (i) a high content of PGMs (Pd and Rh) loading with a variable concentration distribution along the catalyst, called zone-coating, was investigated in order to take advantages of an in situ pre-heating due to exothermic oxidation processes. And (ii) the use of external device for heating the monolith with the aim to shorten the laps of time to reach the required temperature for their conversion. Both approaches were compared below 300 °C in terms of NO, CO and hydrocarbons conversions as well as N2O formation with respect to homogeneously wash-coated catalyst. For evaluation, complex exhaust gas compositions were considered at different steady-state air-to-fuel λ ratios and high frequency transient lean/rich regime to mimic real operation in gasoline engine exhaust. Results show that a pre-heating of the catalyst at 300 °C is necessary to avoid completely N2O formation from NO reduction with CO. Remarkably higher NO and CH4 conversions were observed during transient regime rather than steady-state lean, rich or stoichiometric conditions at 200 and 300 °C

Treatment of esomeprazole in water by non-thermal plasma

International audienc

Investigation of performances of present-day commercial three-way monolithic catalysts under realistic conditions

International audienc

Improved performance of Three-Way Catalysts via the periodic Rich and Lean switching under a complex gas matrix

National audienc

Paracetamol removal from water by non-thermal plasma technology coupled to activated carbons

International audienc

Evaluating different strategies to minimize cold-start emissions from gasoline engines

International audienc

Towards zero-emission gasoline engine: evaluating different catalyst design strategies

International audienc