Simultaneous removal of nox and fine diesel particulate matter (DPM) by electrostatic water spraying scrubber

Abstract

In this study, experiments were performed with an electrostatic water spraying scrubber to evaluate its effectiveness for simultaneous removal of NOx and Diesel Particulate Matter (DPM) emissions in marine exhaust gas. The effects of several parameters, such corona power, gas flow rate and engine load, on the contaminant removals have been investigated intensively. The present study shows that for a given gas flow rate, the removal of DPM is enhanced with the increase of applied voltage. Total DPM removal efficiency was higher than 97% by electrostatic attraction, DPM with a range smaller than 1Όm is removed for higher efficiency. NO, NOx were removed with values higher than 20%, depending on Cl− concentration in the seawater and engine loads. As a result, the electrostatic water spraying scrubber would appear to be a promising alternative method for control of mass-based, as well as number-based DPM emissions. © 2009 2009 Taylor and Francis Group LLC.