Abstract
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 nano- tubes. With a typical gas flow of 1 m3/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.
Original language | English |
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Article number | 5313884 |
Pages (from-to) | 2298-2302 |
Number of pages | 5 |
Journal | IEEE Transactions on Plasma Science |
Volume | 37 |
Issue number | 12 |
DOIs | |
Publication status | Published - 1 Dec 2009 |
Keywords
- Glow-to-spark transition
- Microwave discharge
- Nanotubes
- Plasma torches
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Condensed Matter Physics