A Study of Oxygen-water Vapor Mixtures Under RF Excitation by Electron Paramagnetic Resonance Techniques

Résumé du livre

Applicability of the paramagnetic resonance technique to analyze combustion products of fuel mixtures ignited by RF discharge were studied. To te t the underlying assumptions, water vapor and oxygen mixtures were analyzed at first. Qualitative as well as quantitative determination of atomic H atomic O molecular O2, and OH radical was obtained from the EPR spectrum. Specifically, upon application of RF discharge on mixtures of water v por (partial pres ur, 50 to 200 microns) and O (partial pressure, 0 to 300 microns) the following informatio was obtained: the abs nc of t e OH species below 100 microns wat r vapor pre ure, and of the O species above 130 microns water vapor pressure; the lack of dependence of these cutoff pressures on he amount of O added to the water vapor previous to the discharge; the enhancement of the OH radical up to 5 times upon addition of sufficient O to the mixture; and the existence of the OH radical in a total concentration of less than 1% when observed. These results indicate hat the extension of the paramagnetic resonance technique to measure the combustion produc s of fuel mixtures igni ed by RF is feasible. Detection of atomic N, CH3, and other radicals by this technique is also possible. (Author).