The Influence of Direct Non-Thermal Plasma Treatment on Particulate Matter (PM) and NOx in the Exhaust of Marine Diesel Engines
Marcin Hołub1, Stanisław Kalisiak1, Tadeusz Borkowski2, Jarosław Myśków2, Ronny Brandenburg3
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1Electrical Engineering Department, West Pomeranian University of Technology,
Sikorskiego 37, 70-313 Szczecin, Poland
2Faculty of Marine Engineering, Maritime University of Szczecin,
Wały Chrobrego 1-2, 70-500 Szczecin, Poland
3Leibniz Institute for Plasma Science and Technology (INP Greifswald),
Felix-Hausdorff-Str. 2 17489 Greifswald, Germany
Pol. J. Environ. Stud. 2010;19(6):1199–1211
Our paper discusses a combined approach to reduce NOx and particulate matter (PM) emitted by medium- speed marine diesel engines using non-thermal plasma (NTP) reactors. The design of the employed reactor relies on dielectric barrier discharge consisting of 36 parallel electrode rods positioned as to allow for movement of gas stream through the assembly. The plasma was driven by a novel power supply based on a series-parallel resonance circuit topology, which permits high voltage and frequency operation. Early results from the implementation of the non-thermal plasma reactor in the exhaust duct of a test bench diesel engine demonstrate considerable improvement of gas composition and particulate matter emission at extremely low energy densities (up to 16 J/dm3). The conversion of PM to gaseous SOF and soot is investigated and confirms that removal rate of unbalanced PM increases with a reactor’s power. In addition, a partial oxidation of NO to higher nitride oxides (e.g. NO2) is identified.