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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Print: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v13.i3-4.50
pages 315-324

EXPERIMENTAL STUDY OF THE EFFECT OF REACTIVE GAS INJECTION GEOMETRY IN ATMOSPHERIC PRESSURE INDUCTIVE PLASMA TORCH ON THE CHEMICAL EFFICIENCY

J. Degoulange
SIMAP Laboratory, BP 75, 38402 Saint Martin d'Heres
D. Pelletier
SIMAP-EPM, BP 75, 38402 St Martin d'Hères, France. Now at CEA/INES-RDI, BP332, 73377 Le Bourget du Lac, France
B. Bournonville
Commissariat à l'Energie Atomique, CEA Le Ripault BP 16,37 260 Monts; SIMAP Laboratory, BP 75, 38402 Saint Martin d'Heres
G. Chichignoud
SIMAP Laboratory, BP 75, 38402 Saint Martin d'Heres
Y. Delannoy
SIMAP-EPM, BP 75, 38402 St Martin d'Hères, France
C. Trassy
UPR 9033 CNRS - EPM, ENSHMG BP 95 - 38402 Saint-Martin-d'Heres - France

ABSTRACT

The effect of the reactant gas injection mode into inductively coupled plasma has been investigated, through the volatilization reaction of a graphite target submitted to argon-oxygen plasma. A graphite disk is positioned at different distances under the plasma torch. The addition of oxygen to the plasma results in a carving of the graphite surface, which depend on the injection mode: into the outer, the intermediate or the inner argon flow. The mass losses permit to evaluate the global efficiency. The profile of the graphite surface at the end of the operation reflects the distribution of the reactive species. The graphite is heated by induction in order to stabilise its temperature between 1500 and 1800 K and to obtain stable reaction conditions. The most efficient, from the point of view of the reactive gas, consists in addition to the inner flow. The most homogeneous volatilization is obtained when the reactant is added to the outer flow.


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