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The effect of pulse voltage, polarity, duty cycle, and oxygen flow rate on ozone production is studied in a coaxial cylindrical-type dielectric barrier discharge ozonizer at atmospheric pressure. For a constant oxygen flow rate, the ozone concentration increases with increasing input voltage and is nearly proportional to the ozone production efficiency. The bipolar waveform of the applied voltage...
Metalloporphyrins supported on silica were tested as catalysts for the oxidation of isobutane by dioxygen. Iron meso-tetra(pentafluorophenyl)porphyrin (FeF 20 TPP) supported on aminopropyl-functionalized silica was catalytically active (700 turnovers), but degraded quickly. Catalysts prepared by the adsorption of iron or manganese meso-tetra(4-N-methyl-pyridyl)porphyrin (MTNMePyP, where...
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