Nonself-Sustained Microwave Discharge in a System for Hydrocarbon Decomposition and Generation of Carbon Nanotubes

This paper deals with the investigation of a method for sustainment of high-power microwave discharge in the installation for natural-gas decomposition. The essence of the method is to provide a generation of auxiliary discharge plasma in the area where the main microwave plasma torch burns. The des...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2009-12, Vol.37 (12), p.2298-2302
Main Authors: Korolev, Y.D., Frants, O.B., Landl, N.V., Geyman, V.G., Zerlitsyn, A.G., Shiyan, V.P., Medvedev, Y.V.
Format: Article
Language:English
Subjects:
Carbon nanotubes
Coaxial components
Decomposition
Discharge
Electrodes
Fluid flow
Frequency
Glow-to-spark transition
High power microwave generation
Hydrocarbons
Microwave discharge
Microwave generation
Microwave theory and techniques
Multilayers
nanotubes
Natural gas
plasma torches
Plasmas
Tubes
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Summary:This paper deals with the investigation of a method for sustainment of high-power microwave discharge in the installation for natural-gas decomposition. The essence of the method is to provide a generation of auxiliary discharge plasma in the area where the main microwave plasma torch burns. The design of the electrode system of auxiliary discharge resembles that for a coaxial plasmatron that consumes an average current of about 0.1 A. Then, the nonself-sustained microwave discharge with a frequency of 2.45 GHz has been obtained at a power level from 1 to 3 kW. Such a discharge has been used in the installation for natural-gas decomposition and generation of the carbon nanotubes. With a typical gas flow of 1 m 3 /h, the natural-gas conversion achieves 40%-80%. Three types of nanotubes are contained in the final product: multilayer tubes, single-layer tubes, and onion-type tubes.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2009.2032546