A5053930541- Catalytic Processes in Materials Science
- Fusion materials and technologies
- Magnetic confinement fusion research
- Catalysis and Oxidation Reactions
- Catalysis and Hydrodesulfurization Studies
- Superconducting Materials and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Industrial Gas Emission Control
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Nuclear Materials and Properties
- Gas Sensing Nanomaterials and Sensors
- Laser-Plasma Interactions and Diagnostics
- Thermography and Photoacoustic Techniques
- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Nanomaterials for catalytic reactions
- Plasma Diagnostics and Applications
- Hydrogen Storage and Materials
- Welding Techniques and Residual Stresses
- Metallurgical Processes and Thermodynamics
- Gyrotron and Vacuum Electronics Research
- Calibration and Measurement Techniques
- Electrocatalysts for Energy Conversion
CEA Cadarache
2015-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2024
Institut de Chimie des Milieux et des Matériaux de Poitiers
2014-2024
Université de Poitiers
2014-2024
Centre National de la Recherche Scientifique
2010-2024
Institut de Recherche sur la Fusion par Confinement Magnétique
2007-2023
Korea Institute of Fusion Energy
2011
Southwestern Institute of Physics
2011
Culham Centre for Fusion Energy
2011
Culham Science Centre
2011
With WEST (Tungsten Environment in Steady State Tokamak) (Bucalossi et al 2014 Fusion Eng. Des. 89 907–12), the Tore Supra facility and team expertise (Dumont Plasma Phys. Control. 56 075020) is used to pave way towards ITER divertor procurement operation. It consists implementing a configuration installing ITER-like actively cooled tungsten monoblocks tokamak, taking full benefit of its unique long-pulse capability. user platform, open all partners. This paper describes physics basis WEST:...
This review aims to give a general overview of the recent use tungsten-based catalysts for wide environmental applications, with first some useful background information about tungsten oxides. Tungsten oxide materials exhibit suitable behaviors surface reactions and catalysis such as acidic properties (mainly Brønsted sites), redox adsorption (due presence oxygen vacancies) photostimulation response under visible light (2.6–2.8 eV bandgap). Depending on operating condition catalytic process,...
Abstract WEST is an MA class superconducting, actively cooled, full tungsten (W) tokamak, designed to operate in long pulses up 1000 s. In support of ITER operation and DEMO conceptual activities, key missions are: (i) qualification high heat flux plasma-facing components integrating both technological physics aspects relevant particle exhaust conditions, particularly for the monoblocks foreseen divertor; (ii) integrated steady-state at confinement, with a focus on power issues. During phase...
WO3/CexZr1–xO2 materials were evaluated as a possible NH3-selective catalytic reduction (SCR) active catalyst in NOx storage (NSR) + SCR combined system. The effect of the support composition was investigated at constant WO3 loading (9.1 wt % WO3). impact promotion over textural, structural, acid–base, and redox properties samples characterized by means nitrogen adsorption–desorption isotherms, XRD, capacity, NH3 temperature programmed desporption, pyridine adsorption followed FTIR, H2-TPR....
The adsorption of CO on a 4.7% Cu/Al2O3 catalyst either reduced or oxidized is studied using the FTIR spectra recorded at temperatures Ta in range 298−740 K and with two constant partial pressures Pa (103 104 Pa). On solid = 300 single IR band detected 2092 cm-1 ascribed to linear species (denoted by L0) Cu° particles. lead determination evolution coverage θ L0 for pressures. In temperature 380 > 480 K, curves f(Ta) are very good agreement Temkin's model. Moreover, it shown that, 300−600 an...
To treat the NOx emissions from diesel vehicles, selective catalytic reduction (SCR) process by NH3 requires use of a precursor: an urea aqueous solution. Using innovative experimental synthetic gas bench adjusted to powdered catalysts and allowing or ammonia, competitive reactivity HNCO intermediate species was evidenced. This found be highly reactive toward NO2, without reduction. During SCR process, mix both NO NO2 evidenced react with contribute efficiency, resulting in original pathway.
Combined magnetron sputtering and ion implantation (CMSII) is a deposition technique involving simultaneous high energy bombardment of the coating during its growth. A voltage pulse discharge (U=40 kV, τ=20 μs, f=25 Hz) superposed over in this way, positive ions are accelerated to components be coated, bombarding initially substrate then itself. In framework ITER-like wall project method was applied produce nanostructured W coatings on carbon fibre composite (CFC) substrate. These have been...
A new ITER-relevant lower hybrid current drive (LHCD) launcher, based on the passive-active-multijunction (PAM) concept, was brought into operation Tore Supra tokamak in autumn 2009. The PAM launcher concept designed view of ITER to allow efficient cooling waveguides, as required for long pulse operation. In addition, it offers low power reflection close cut-off density, which is very attractive ITER, where large distance between plasma and wall may bring density front values. first...
Abstract The consequences of tungsten (W) melting on divertor lifetime and plasma operation are high priority issues for ITER. Sustained controlled W-melting experiment has been achieved the first time in WEST a poloidal sharp leading edge an actively cooled ITER-like facing unit (PFU). A series dedicated power steady state discharges were performed to reach point tungsten. was exposed parallel heat flux about 100 MW.m −2 up 5 s providing melt phase 2 without noticeable impact (radiated...
Abstract This paper summarizes the emissivity measurements performed on plasma-facing units (PFU) of WEST lower divertor during first phase running with a mix actively cooled ITER-like PFUs made bulk tungsten (W) and inertially graphite coating tungsten. In situ assessments laboratory after removing W-coated ITER-grade from device are shown. The exhibit complex pattern strong variation as function space time mainly explained magnetic equilibrium (strike point location) well plasma...