EXCLUSIVE: OEMs discuss marine aftertreatment strategies at Integer Emissions Summit Europe

Niels Tholen - 14 July 2014

Marine engine manufacturers MAN and Daewoo discussed their strategies for the upcoming IMO Tier III NOx emissions legislation at the 10th Integer Emissions Summit Europe 2014 in Dusseldorf, Germany.

Daniel Struckmeier, General Project Manager for Emissions 2016 at MAN Diesel & Turbo SE discussed MAN's preference for Selective Catalytic Reduction (SCR) technology for use in 4-stroke engines. According to MAN, SCR technology has shown great potential for marine applications and would need no further research and development activity to be used in Tier III marine vessels compared to other technologies such as Exhaust Gas Recirculation (EGR). MAN has now adopted a strategy of providing shipbuilders with 4-stroke engines together with modular SCR systems for the engine range of 430 kW to 21,600 kW.

Jong Ki Lim, Senior Engineer, Ship Marketing Engineering Department at Daewoo Shipbuilding and Marine Engineering, said that for 2-stroke engines, however, low exhaust gas temperatures would limit the effectiveness of the SCR catalyst. Daewoo's solution to this problem involves the heating of the exhaust gas to temperatures suitable for SCR catalysis. Daewoo did not show a preference for either SCR or EGR in regards to 2-stroke engines, stating that it prefers to leave this decision to its customers.

Other strategies discussed as potential ways of reducing NOx emissions from marine applications included dual fuel and LNG engines. While dual fuel would still need to use NOx aftertreatment technology, LNG would not. The latter technology's methane slip was highlighted as being the primary issue which currently hampers large-scale application of this technology.

The 10th Integer Emissions Summit Europe 2014 took place on 17-19 June at the Hilton Hotel Dusseldorf, Germany. Integer Research operates DiscoverDEF.com

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