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Title: Energy density dependence of hydrogen combustion efficiency in atmospheric pressure microwave plasma

The recovery of tritium in nuclear fusion plants is a key issue for safety. So far, the oxidation procedure using an atmospheric pressure plasma is expected to be part of the recovery method. In this study, in order to clarify the mechanism of hydrogen oxidation by plasma chemistry, we have investigated the dependence of hydrogen combustion efficiency on gas flow rate and input power in the atmospheric pressure microwave plasma. It has been found that the combustion efficiency depends on energy density of absorbed microwave power. Hence, the energy density is considered as a key parameter for combustion processes. Also neutral gas temperatures inside and outside the plasma were measured by an optical emission spectroscopy method and thermocouple. The result shows that the neutral gas temperature in the plasma is much higher than the outside temperature of plasma. The high neutral gas temperature may affect the combustion reaction. (authors)
Authors:
;  [1] ;  [2] ;  [3] ; ;  [4]
  1. Nagano National College of Technology, Nagano-city, Nagano (Japan)
  2. Shinshu University, Nagano-city, Nagano (Japan)
  3. Kanazawa University, Kakuma-cho, Kanzawa-city, Ishikawa (Japan)
  4. National Insitute for Fusion Science, Toki-city, Gifu (Japan)
Publication Date:
OSTI Identifier:
22429789
Resource Type:
Journal Article
Resource Relation:
Journal Name: Fusion Science and Technology; Journal Volume: 67; Journal Issue: 3; Conference: TRITIUM 2013: 10. International Conference on Tritium Science and Technology, Nice Acropolis (France), 21-25 Oct 2013; Other Information: Country of input: France; 7 refs.
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ATMOSPHERIC PRESSURE; EMISSION SPECTROSCOPY; ENERGY DENSITY; HYDROGEN; PLASMA; THERMOCOUPLES; THERMONUCLEAR REACTORS; TRITIUM; TRITIUM RECOVERY