Investigation and control of the - to -transition in a novel sub-atmospheric pressure dielectric barrier discharge

摘要: A novel flow-driven dielectric barrier discharge concept is presented, which uses a Venturi pump to transfer plasma-generated reactive oxygen and nitrogen species from sub-atmospheric pressure () region ambient can be operated with air. By adjusting the working of device, plasma chemistry tuned continuously an ozone ()-dominated mode oxides ()-only mode. The source characterized focusing on mechanisms effecting this change. composition device's output gas was determined using Fourier-transform infrared spectroscopy. results are correlated measurements chamber temperature as well input power. It found that mode-change controlled by pressure. capable generating -dominated at temperatures distinctly below . Through mixing processed stream second flow pressurized air required for operation pump, resulting product remains close room temperature. reduced zero-dimensional reaction kinetics model only seven reactions describing observed pressure- temperature-dependence mode-change.