Direct application of non-thermal plasma to PM reduction from marine diesel engines

This paper describes the experimental method - using non-thermal plasma reactor to cleaning exhaust gases - focused on PM compound. The demonstrator NTP reactor assembly was built as the by-pass in the real exhaust gas after-treatment system, in marine diesel engine. The reactor used to experiment is called - DBD (dielectric barrier discharge) type, The main aim of investigation was to analyze exhaust gas PM compounds under steady load of the engine. Test bench construction enables direct exhaust stream (main exhaust duet by-pass) to plasma reactor exposure with no additional components (coolers, orifices) that can change the exhaust gas properties. A new monitoring PM analyzing system, which can measure soot and SOF in low mass level, has been engaged. It consist of a diffusion charging (DC) detector with a dilution device for soot measurement, and two differential flame ionization detection (FID) method, which uses two FID detectors with separate sample lines. Exhaust emission reduction strategy for ships, Particulate Matters - PM in exhaust gas, non-thermal plasma reactor, experimental test bed and procedure, an example of reactor power measurement, test results provided into seven stages are presented in the paper.