Stabilization of microwave arc plasmas of hydrocarbons at atmospheric pressure |
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| Authors: | Mark W. Simon Jeffrey R. Rozak Steven L. Suib Jeffrey Harrison Mahmoud Kablauoi |
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| Affiliation: | (1) Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, USA;(2) Department of Chemical Engineering, University of Connecticut, Storrs, Connecticut 06269-3060, USA;(3) Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3060, USA;(4) Present address: Saint-Gobain Corporation/North Company, One New Bond Street, Worcester, MA 01615, USA;(5) Texaco Research Center, Texaco, Inc., P. O. Box 509, Beacon, New York 12508, USA |
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| Abstract: | Pure hydrocarbon plasmas have been generated at low pressures with good efficiency using methane as a reactant. Hydrocarbon plasma discharges containing high energy, free radical, and ionized intermediates were analyzed in situ using emission spectroscopy. Emission spectra were correlated with analytical data obtained from resultant product mixtures and literature assignments of emission bands in order to identify these intermediates. Stabilization of atmospheric methane plasmas using argon as a diluent has also been demonstrated in this study. Emission spectroscopy has also been used to identify reaction intermediates formed in plasmas at high pressures. Distinct differences in plasma discharges have been observed as a function of pressure, power, and methane concentrations at the molecular level using in situ spectroscopic techniques. |
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