Abstract
In order to solve air pollution problem, atmospheric plasma application is desirable. In this study, we realized the real-time OH density measurement in trichloroethylene (TCE) decomposition by coaxial cylinder pulsed barrier discharge. Laser-induced fluorescence measurement indicated that OH density is about 30 ppm at 3 μs after discharge when +28 kV is applied. As for the negative discharge, OH measurement revealed that OH production is almost the same but OH density is about a half compared to those in positive discharge, due to the difference in streamer radius. The TeE addition in background accelerated OH decay, and by chemical reaction simulation, OH-TeE reaction coefficient was estimated to be about 2.3 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-12</sup> [cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> /s]. Humidity effect on TeE decomposition efficiency in N <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> pulsed barrier discharge is also investigated using the same reactor. The increasing humidity resulted in enhancement of TeE decomposition efficiency, indicating that OH plays important role in TeE decomposition.
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