Supplemental Information Development of a Novel Electrostatic Precipitator System Using a Wet-porous Electrode Array Woojin Kim1*, Heekyung An1, Dongmok Lee1, Woojong Lee1, Jae Hee Jung2* 1 Technology Convergence R&BD Group, Korea Institute of Industrial Technology, 320 Technosunhwan-ro, Yuga-myeon, Dalseong-gun, Daegu, 711-880, Republic of Korea 2 Center for Environment, Health, and Welfare Research, Department of Energy and Environmental Engineering, Korea University of Science and Technology (UST), Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea 1 Figure S-1. (a) Surface deviations of the liquid layer on the wet porous electrode. (b) X-ray photograph and (c) the surface roughness distribution of the wet porous electrode. These data were analyzed by a X-ray micro-focus computed tomography scanner (Model phoenix v|tome|x m, GE Measurement & Control Solutions, Billerica, MA, USA). The surface deviations of the liquid layer were distributed within ±30 µm from the reference plane, a significant improvement compared with that of a traditional wet ESP. Generally, the thickness of the liquid layer in a traditional wet ESP is approximately 4–6 mm, and the surface deviation of the liquid layer is ±180~500 µm from the reference plane (Dors et al., 1998; Saiyasitpanich et al., 2006; Lin et al., 2010). 2 (b) (c) n= 2000 References Dors, M., Mizeraczyk, J., Czech, T., Rea, M. (1998). Removal of NOx by DC and pulsed corona discharges in a wet electrostatic precipitator model. J. Electrostat., 45:25‒36. Lin, G. Y., Tsai, C. J., Chen, S. C., Chen, T. M., Li, S. N. (2010). An efficient single-stage wet electrostatic precipitator for fine and nano-sized particle control. Aerosol Sci. Tech., 44:38‒45. Saiyasitpanich, P., Keener, T. C., Lu, M., Khang, S. J., Evans, D. (2006). Collection of ultrafine diesel particulate matter (DPM) in cylindrical single-stage wet electrostatic precipitators. Environ. Sci. Technol., 40:7890‒7895. 3