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    Preparation of monodisperse charged droplets via electrohydrodynamic device for the removal of fine dust particles smaller than 10 mu m

    Year: 2019

    Journal: Adv. Powder Technol., Volume 30, JAN, page 190–198

    Authors: Lee, Kyusang; Lee, Kyoung Il; Jeon, So Young; Kim, Seonmin

    Organizations: Korea Ministry of Environment (MOE) [RE201600016005]

    Keywords: Electrohydrodynamic; Fine dust; Fine particles; Electrolyte; Charged droplets

    Electrohydrodynamic (EHD) device is utilized in various applications and could be useful for the suppression of particulate matter in ambient conditions. In this study, we focused on the ejection of charged droplets containing electrolytes in a microdripping mode and with high charge density. Several different electrolytes with different physical and electrical properties were tested for our EHD process in order to produce the charged droplets stably. Results from series images by high-speed camera represented that droplet size and frequency were dependent on the applied voltage and flow rate, and showed different behaviors in various EHD modes such as dripping, microdripping, mixed dripping, and unstable dripping. Consecutive experimental data for charge density showed that 15 wt% KCl solution was proper to obtain highly charged droplets with the size from 50 to 100 mu m. For this solution, the suppression of the fine dust particle was tested for the removal of PM10, PM2.5, and PM1 at various applied voltages. The droplet formation in microdripping mode was effective for the removal of smaller dust particles and could be applicable for the air remediation in indoor or domestic environment. (C) 2018 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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