We developed a novel flow plasma system which could continuously treat water. Atmospheric nitrogen molecules entering the plasma were decomposed into the constituent atoms. Successive formations, first nitrite, then nitrate ions, could be explained by a thermodynamic model and reactions with in situ formed H2O2.
When high and short-pulse voltage was applied with a high repetition frequency to tungsten electrodes placed in water containing ammonia and water containing 2-methyl-2-propanol, gas evolved vigorously from the plasma generated between the electrodes. The main gas evolved was H 2 in both aqueous solutions. Decomposition of ammonia provided N 2 in addition to H 2 . In the decomposition of aqueous 2-methyl-2-propanol solution, CO, CO 2 , methane, ethane, ethylene, and acetylene were generated in addition to H 2 . The "temperature" deduced by kinetic consideration using the yields of C2 products (ethane, ethylene, and acetylene) formed by the recombination of two methyl radicals was calculated to be ca. 4200 K.
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