Source
Hellenic Shipping News 30.12.2011
ClassNK
announced today that it had awarded its first ever Statement of Fact for Tier
III nitrogen oxide (NOx) reductions to a marine diesel engine incorporating a
Selective Catalytic Reduction (SCR) system. The document, issued on 1 November
2011, verifies that the NOx emission measurement results for the engine, fitted with a
pre-turbocharger SCR system developed by Hitachi Zosen Corporation, meets the
NOx Tier III emission limits stipulated in amendments to Annex VI of the
International Convention for the Prevention of Pollution from Ships 1973
(MARPOL). The engine in question was fitted as the propulsion system for MV
“SANTA VISTA”, a 37,800 dwt general cargo ship, built by Naikai Zosen
Corporation for Nissho Shipping Co., Ltd., which entered service on 31 October
2011.Not only is this the first time that ClassNK has issued such a document
for a marine diesel engine fitted with an SCR system, it is also the first
statement of fact issued by the Society for Tier III NOx reduction compliance
of any kind. SCR systems, currently a hot topic as industry looks for solutions
to strengthening NOx regulation, offer the potential for independent reductions
in emissions of more than the 80% required under Annex VI. Anticipating a
growing interest in this technology and its applications in the near future,
ClassNK released new guidelines, Guideline for SCR (Selective Catalytic
Reduction) Systems and Reductant Agent Supply Systems, to assist manufacturers,
shipyards, and owners in installing such systems on their commercial vessels.
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