Dilute Trichloroethylene Decomposition by using High Pressure Non-Thermal Plasma: Humidity Effects

Plasma application for environmental improvement is desirable and it is worthwhile to clarify the effect of humidity on the plasma process. We investigated humidity effect by both approaches of the radical temperature measurement by LIF and practical decomposition experiment. As humidity increases, The OH rotational temperature rises quickly and reaches high. As well-known, ozone generation is suppressed by addition of water vapor. TCE decomposition efficiency increases with humidity rising up to 20%, while the efficiency decreases when humidity exceeds 20%. We compared the experimental results with chemical reaction simulation, finding that temperature shift with humidity leads to similar pattern of efficiency variation.