Interaction of Nonthermal Plasma with Catalyst for the Air Pollution Control
H. H. Kim and A. Ogata
National Institute of Advanced Industrial Science and Technology (AIST), Japan
Abstract— Physical interaction of atmospheric-pressure nonthermal plasma with catalysts was studied at ambient temperature. Microscope-ICCD camera and IR camera were used to observe the discharge plasma and the temperature profile of the catalyst. Two different discharge modes were observed in the catalysts-packed plasma reactors; partial discharge and surface streamer. Packing material, applied voltage and the presence of oxygen were found to play important role in determining the discharge patterns in the catalyst-packed plasma reactor. Metal nanoparticles supported on zeolites enhanced the surface streamer propagation over the wide area of surface. On the other hand, only partial discharge mode was observed with the BaTiO3 pellets (εs = 10000). The presence of oxygen decreased the plasma intensity, while increased the number of surface streamers.
Keywords— Nonthermal plasma, catalyst, ICCD camera, IR imaging, surface streamer, adsorption, VOC