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| Hauptseite > Publikationsdatenbank > Pyrolysis of methane by microwaves Part 1 |
| Hauptseite > Publikationsdatenbank > Pyrolysis of methane by microwaves Part 1 |
| Book/Report | FZJ-2018-00401 |
; ;
1975
Kernforschungsanlage Jülich, Verlag
Jülich
Please use a persistent id in citations: http://hdl.handle.net/2128/16540
Report No.: Juel-1188-01
Abstract: The pyrolysis of methane and mixtures of argon-methane by microwaves (2450 MHz) was investigated. The microwave plasma diagnostic study was performed using electrical probes, namely, the double floating probe technique. Parameters such as eleetric field strength and current densities were measured and from their relationship the electron temperature, electrie conductivity, electron and ion densities were evaluated as function of gas pressure, microwave power input and distance of the probe from the microwave cavity. Various spectroscopic techniques were used for the measurement of temperatures in the microwave plasma ; the "reversal temperature" by measuring the intensities of the electronic vibrational Bands of CN and OH molecules and "rotational temperature" from the measured intensities of rotational OH lines. The "rotational" as well as the "reversal temperature" were found to be identical and this temperature was assumed to be the temperature of the gas in the microwave plasma. Energy balance calculation, based upon the electrical energy input and thermal losses, were performed in order to determine if steady state conditions existad in the microwave plasma. Emission and absorption spectroscopy were used for determining the active species formed in the pyrolysis of methane and also of mixtures of CH$_{4}$-Ar, by the microwave plasma.
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