• 2015 March 3

    Mikhail Petrov, senior principal surveyor of RS Machinery Department

    On LNG as bunker fuel

    - There are three tiers of standards for Nox emissions from ships. Tier I NOx emission standards entered into force on January 1, 2000. Tier II NOx emission standards are still effective starting from January 1, 2011. Tier III NOx standards are to come into effect on January 1, 2016.

    Tier III NOx standards set forth very stringent limits on nitrogen oxide emissions, a reduction of 70-80% compared to Tier I standards.

    It is a challenge indeed as the level of available technologies does not let produce the engine powered by a liquid fuel so that it comply with all Tier III NOx standards without installation of additional equipment.   

    There are two alternatives to solve this problem: to fit diesel engine with SKR system decreasing NOx emissions or to use LNG as bunker fuel.   

    Liquefied natural gas (LNG) is a promising fuel for marine vessels. This type of fuel meets NOx emission requirements and complies with sulphur content requirements effective from January 1, 2015 (a limit of 0.1%).

    From the speech at the VI International Forum “Ecology”




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