Nitrogen oxide (NOx) is a major atmospheric pollutant and as such is subject to strict emission standards. NOx emissions from marine vessels are regulated by the International Maritime Organization (IMO). Hitachi Zosen has developed a diesel marine engine featuring marine SCR that complies with the IMO regulations. The engine is the first with an SCR to be commissioned on an actual vessel, having been adopted by Nissho Shipping Co., Ltd.
- The Tier III NOx emission standards were imposed by the IMO in a bid to reduce NOx emissions associated with maritime operations. The Tier III standards require an 80% reduction by 2016 relative to the Tier I standards in 2005.
- Hitachi Zosen has developed an SCR system for marine vessels by adapting NOx removal catalysts for industrial plants. Fitted upstream of the turbocharger, the marine SCR achieves the following benefits: 1.High SCR inlet temperature means reheating is not required, thus saving energy
2.High SCR inlet pressure promotes catalytic activity, thus saving space to enable a more compact design
- October 2011 saw the commissioning of the first ever vessel equipped with a marine SCR diesel engine. In conjunction with Nissho Shipping Co., Ltd, Hitachi Zosen will conduct testing in open waters and port areas to assess overall system reliability and catalyst integrity during extended usage.
- Joint development with MAN Diesel & Turbo
- Hitachi Zosen is involved in a marine SCR joint development project with licenser of diesel engines MAN Diesel & Turbo to produce safe and optimized marine SCR systems.
http://www.hitachizosen.co.jp/english/pickup/pickup004.html
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