Abstract
Removal of tungsten carbide particles which simulate the particulate matter in indoor air was studied. Diameters of tungsten carbide particles were ranging from 1 um to 10 um. Removal rate and movement of these particles which applied on a microplasma electrode was obsreved. Microplasma electrode, with a discharge gap set to 25 μm, enabled discharge to occur at around 1 kV. Applied AC voltage was set to 1 kV and the frequency was varied from 10 Hz to 1 kHz. Particle movement was visualized using a laser and observed to blow off number of times and finally transferred to the outside part of the electrode. When the frequency was 10 Hz, 99% of tungsten carbide particles were moved to the outside of the electrode. It was found that removal rate decreased as the frequency increased. Removal rate and particle movement were different from each tungsten carbide particles diameter. Electrostatic force known as Coulomb force could be the mechanisms of particles' removal and movement as well as ion wind when the diameter of tungsten carbide particles was 1um.
