Honeycomb Discharge Generated with a Single High Voltage Power Supply for Activating Catalyst
K. Takashima, T. Suzuki, Y. Nomura, Y. Hinata, H. Hayashi, H. Kurita, and A. Mizuno
Department of Environmental and Life Sciences, Toyohashi University of Technology, Japan
Abstract- Atmospheric pressure discharge plasma has been widely studied with the intention to apply for many fields, especially to environmental protection. Diesel exhaust cleaning using the non-thermal plasma is one of the most promising applications. We have studied diesel exhaust cleaning using the combination of catalyst and discharge plasma. We have developed a novel way of combining honeycomb catalyst and discharge plasma named "honeycomb discharge", in which seeding discharge generated by DBD is expanded into capillaries of honeycomb catalyst due to DC high voltage application. This paper presents a new configuration of honeycomb discharge reactor which can be operated by a single high voltage power supply. NOx reduction performance using the newly proposed honeycomb discharge reactor and simulated diesel exhaust is presented in this paper. Characteristics of the capillary discharge such as stability, uniformity, onset / flashover voltage and power consumption, were observed against various humidity and temperatures in order to evaluate influence of temperature and humidity on the honeycomb discharge.
Keywords- Diesel engine, exhaust, honeycomb discharge, nitrogen oxides, NH3, SCR, sliding discharge, surface discharge