A5033425287- Plasma Diagnostics and Applications
- Plasma Applications and Diagnostics
- Catalytic Processes in Materials Science
- Electrohydrodynamics and Fluid Dynamics
- Fusion materials and technologies
- Hydrogen Storage and Materials
- Dust and Plasma Wave Phenomena
- Nuclear Materials and Properties
- Ammonia Synthesis and Nitrogen Reduction
- Particle accelerators and beam dynamics
- Metal and Thin Film Mechanics
- Microstructure and mechanical properties
- Advanced Combustion Engine Technologies
- Nanomaterials for catalytic reactions
- Nuclear materials and radiation effects
- Diamond and Carbon-based Materials Research
- Cancer therapeutics and mechanisms
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Layered Double Hydroxides Synthesis and Applications
- Spectroscopy and Laser Applications
- Astrophysics and Star Formation Studies
- Magnetic Field Sensors Techniques
- Adhesion, Friction, and Surface Interactions
- Carbohydrate Chemistry and Synthesis
Centre National de la Recherche Scientifique
2010-2024
Université Sorbonne Paris Nord
2010-2024
Sorbonne Université
2010-2024
Sorbonne Paris Cité
2014-2023
Université Paris Cité
2009-2023
Laboratoire des Sciences des Procédés et des Matériaux
2011-2022
Marie Curie
2009
National Institute of Ecology
2009
Laboratoire de Physique des Plasmas
2009
Chimie ParisTech
2009
This paper reports the results obtained for degradation of acetaldehyde by an atmospheric plasma corona discharge working in a pulsed regime. It was shown that few hundred ppm diluted pure N2 gas flow can be removed up to 80% fed with electric power lower than 1 W. Under same conditions, adding 5% O2 allowed removal 95% initial acetaldehyde. The main identified end products were CO2, CO and methanol. A quasi-homogeneous zero-dimensional chemical model developed investigate respective...
Experiments were performed in a low pressure-high density plasma reactor order to study the impact of hydrogen retention aluminium under conditions. Microscopy scans surface before and after 1 h exposure (fluence 6.1 × 1023 ions/m2) where it is seen that blisters start nucleate at grain boundaries. Investigation on blister growth kinetics was for fluences ranging between 6 3.7 1024 ions/m2. The evolution characteristic size projected area also analyzed. Finally, macroscopic rate equations...
A comparative study of two models, a kinetic and fluid one, for the numerical simulation H2 plasmas in parallel plate capacitively coupled rf discharges one space dimension is presented. Both models adopt multicomponent plasma description including several ionic species, take into account self-consistent electric field by solving Poisson equation include coupling with vibrational kinetics electronic ground state molecules. The peculiarities this particular test case model comparison respect...
The presence of nanostructured dust particles has been reported in thermonuclear fusion reactors with carbon plasma-facing components. These contribute to tritium retention and pollution the edge plasma. Understanding way these can grow plasma phase is necessary for designing engineering solutions that avoid or at least limit their formation. As a first step towards this goal, paper presents numerical study formation simple model laboratory electrical discharge: dc discharge generated argon...
The formation of carbon nanoparticles in low pressure magnetized H 2 /CH 4 and /C plasmas is investigated using infrared quantum cascade laser absorption, mass spectrometry, electrostatic probe measurements. Results showed that dust correlated to the presence a significant amount large positively charged hydrocarbon ions. Large negative ions or neutral were not observed. These results, along with qualitative comparison diffusion reaction characteristic, suggest positive ion may contribute...
The objective of the present work was to examine applicability a non-thermal atmospheric plasma discharge technique for treatment soils contaminated by hydrocarbon pollutants investigated. A soil polluted kerosene (74 mg.kg−1) treated in dielectric barrier reactor at pressure using air as sweep gas flow. concentrations components were determined GC-FID analyses extracts. removal percentages varied from 25 88% times ranging 4 12 minutes. During experiments, exhaust phase also performed. They...
We develop a model for the nucleation, growth and transport of carbonaceous dust particles in non-reactive gas dc discharge where carbon source is provided by cathode sputtering. consider only initial phase when charge density remains small with respect to electron density. find that an electric field reversal at entrance negative glow region promotes trapping negatively charged clusters particles, confining them long times plasma favoring molecular growth. An essential ingredient this...
Gaseous naphthalene has been removed by air plasma generated pulsed corona discharges at 100 °C (LSPM) and dielectric barrier (DBD) up to 250 (LPGP) in different reactors geometries. Naphthalene chosen as one of unburned hydrocarbon present exhaust gas engine during the cold start vehicles. The comparison between discharge geometries possible using specific input energy (SIE) relevant parameter for pollutant removal process control considering differences electrical characteristics flow....
We present work done at LSPM (Laboratory of Sciences Processes and Material Sciences), using the CASIMIR ECR plasma reactor device, aimed answering questions about hydrogen isotope fuel retention dust production in context plasma-facing components (PFCs) International Thermonuclear Experimental Reactor (ITER). The is characterized by means optical spectroscopy, mass spectrometry electrostatic probe; furthermore density size distribution will be measured a laser diagnostic system. some early...
The design and characterization of a multi-dipolar microwave electron cyclotron resonance (ECR) hydrogen plasma reactor are presented. In this configuration, 16 ECR sources disposed uniformly along the azimuthal direction at constant distance from center cylindrical reactor. Several diagnostics have been used to determine key parameters such as neutral species temperature; density H+, H2+, H3+ ion energy distributions. experimental is supported by electromagnetic magnetostatic field...
Aluminum samples have been exposed to a hydrogen plasma generated by low-pressure – high-density microwave reactor. has chosen as surrogate for Beryllium. The fluence was kept below 4 × 1024 ions/m2, in order study the first steps of nucleation and growth surface bulk defects, i.e. blisters bubbles. Experimental analyzes macroscopic rate equation (MRE) modeling on poly- single- crystals were made investigate role played grains boundaries retention. Temperature programmed desorption (TPD) Al...
An alternative route for metal hydrogenation has been investigated: cold plasma hydrogen implantation on polyol-made transition nanoparticles. This treatment applied to a challenging system, Ni-H, induces re-ordering of the lattice, and superstructure lines have observed by both Bragg-Brentano grazing incidence X-ray diffraction. The resulting intermetallic structure is similar those obtained very high-pressure nickel prompt us suggest that plasma-based in nanometals likely generate unusual...
This paper discusses some aspects of n-hexane soot reactivity in a multi-pin to plate pulsed corona discharge working the nanosecond regime at atmospheric pressure. The soot-discharge interaction was quantified by measuring densities CO, CO2, O3 and NO2 out-coming from cell. Results showed that CO2 is major product oxidation. They also strong enhancement oxidation for O2 percentage greater than 10% cathode temperatures above 425 K. significantly enhanced when frequency increased. results...
This paper deals with the experimental determination of spatial and temporal evolutions ozone concentration in an atmospheric pressure pulsed plasma, working nanosecond regime. We observed that was produced localized region streamer. The transport requires a characteristic time well above millisecond. numerical modelling streamer expansion confirms hydrodynamic filamentary discharge during propagation does not lead to significant atomic oxygen ozone. It appears therefore only diffusional can...