A5090288862- Plasma Applications and Diagnostics
- Plasma Diagnostics and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Catalytic Processes in Materials Science
- Catalysts for Methane Reforming
- Advanced Chemical Physics Studies
- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Dust and Plasma Wave Phenomena
- Laser-induced spectroscopy and plasma
- Complex Systems and Time Series Analysis
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Silicon Carbide Semiconductor Technologies
- Industrial Gas Emission Control
- Cold Atom Physics and Bose-Einstein Condensates
- Catalysis and Oxidation Reactions
- Minerals Flotation and Separation Techniques
- Financial Risk and Volatility Modeling
- Solar and Space Plasma Dynamics
- Chaos control and synchronization
- Particle Accelerators and Free-Electron Lasers
- Ionosphere and magnetosphere dynamics
- Optical properties and cooling technologies in crystalline materials
- Particle Detector Development and Performance
Laboratoire de Physique des Gaz et des Plasmas
2022
Dutch Institute for Fundamental Energy Research
2015-2020
Plasma (Russia)
2019
John Wiley & Sons (Germany)
2018
University of Bari Aldo Moro
2018
Fraunhofer Institute for Interfacial Engineering and Biotechnology
2018
Polytechnique Montréal
2018
Université Paris-Sud
2011
Centre National de la Recherche Scientifique
2011
Universitatea Națională de Știință și Tehnologie Politehnica București
2011
The strong non-equilibrium conditions provided by the plasma phase offer opportunity to beat traditional thermal process energy efficiencies via preferential excitation of molecular vibrations. Simple physics considerations are presented explain potential dissociation pathways in and their effect on efficiency. A common microwave reactor approach is evaluated experimentally with Rayleigh scattering Fourier transform infrared spectroscopy assess gas temperatures (exceeding 10(4) K) conversion...
A suite of diagnostics is proposed to characterize microwave plasma dissociation CO 2 : laser scattering, Fourier transform infrared spectroscopy, and passive emission imaging. It provides a comprehensive performance characterization as illustrated on the basis experiments in 2.45 GHz, 1 kW reactor with tangential gas injection. For example, two operating regimes are identified function pressure: diffuse constricted mode. Their occurrence explained by evaluation propagation, which changes...
Non‐oxidative methane activation is carried out in a microwave plasma reactor for coupling to higher hydrocarbons. Fourier transform infrared spectroscopy (FTIR) was used measure absolute concentrations of the major hydrocarbon species. Hydrogen concentration also independently inferred from pressure‐based change molar flow measurements. By closing both carbon and hydrogen balance, stoichiometry reactions, amount deposits obtained as well. Additionally, core gas temperatures up 2500 K were...
Abstract Vibrational excitation of methane is believed to promote chemistry and improve product selectivity, compared thermal conversion methods. We report on unique direct measurements vibrational–rotational non-equilibrium in plasma. The sustained for 50 μ s, after which the gas temperature equilibrates with vibrational at around 900 K. plasma generated by applying 200 30 Hz pulses microwave radiation 25 mBar. demonstrate that discharges, power transfer modes CH 4 dominant mechanism, leads...
Vibrational activation of N2 molecules in a flowing microwave plasma is investigated the context utilising electrical energy for chemical conversion. Spatial profiles rotational (Tr) and vibrational (Tv) temperatures are measured by Raman scattering. Maximum values Tr = 3500 K Tv 6000 were observed centre at low pressure (50 mbar). A detailed quantification local content shows how strong non-equilibrium character discharges compares with closer-to-equilibrium distribution higher pressures....
A flowing microwave plasma based methodology for converting electric energy into internal and/or translational modes of stable molecules with the purpose efficiently driving non-equilibrium chemistry is discussed. The advantage a reactor that continuous chemical processes can be driven flexibility startup times in seconds timescale. approach generically suitable conversion/activation such as CO2, N2 and CH4. Here reduction CO2 to CO used model system: complementary diagnostics illustrate how...
Abstract Ultra-high resolution particle-in-cell coupled to Monte-Carlo collisions modelling unveils microscale instabilities in non-equilibrium plasmas fulfilling Penrose’s instability criterion. The spontaneous development of ion turbulence the phase-space generated by charge exchange leads finite amplitude modulations local electric field. latter are responsible for trapping low energy electrons and their transport from plasma volume sheath vicinity. Electrostatic tidal effect occurring...
The development of a high performance negative ion (NI) source constitutes crucial step in the construction Neutral Beam Injector (NBI) future fusion reactor ITER. NI should deliver 40 A H− (or D−), which is technical and scientific challenge, requires deeper understanding underlying physics its magnetic filter. present knowledge extraction mechanism from limited concerns magnetized plasma sheaths used to avoid electrons being co‐extracted together with NI. Moreover, due asymmetry induced by...
A flowing microwave plasma based methodology for converting electric energy into internal and/or translational modes of stable molecules with the purpose efficiently driving non-equilibrium chemistry is discussed. The advantage a reactor that continuous chemical processes can be driven flexibility startup times in seconds timescale. approach generically suitable conversion/activation such as CO2, N2 and CH4. Here reduction CO2 to CO used model system: complementary diagnostics illustrate how...
Electrification of chemical industry is essential in order to keep up with the modernizing energy supply. The microwave plasma uniquely suited deposit high electrical power stable molecules, drive reactions that would otherwise only be possible at very temperatures.
Summary form only given. Sustainable energy generation by means of wind or from solar radiation through photovoltaics concentrated power will be a significant part the mix in 2025. Intermittency (due to e.g. day/night cycle) as well regional variation these sources requires store and transport on large scale. A promising option is creating artificial fuels (or CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> neutral fuels) with...