At a meeting of IMO’s Marine Environment Protection Committee (MEPC) held in October 2016, a decision was reached to tighten regulations on the sulfur content of marine fuels in all waters of the world, except designated “emission control areas” (ECAs), from the current 3.5% limit to less than 0.5% starting on January 1, 2020. Under the International Convention for the Prevention of Pollution from Ships (MARPOL), state parties to the convention are allowed, in lieu of using marine oil with sulfur content below 0.5%, to use marine fuel with a sulfur content of 3.5% on ships that are equipped with systems of equivalent efficiency as confirmed by the supervisory authority of the party to the convention.
Mitsubishi Heavy Industries, Ltd. and Mitsubishi Kakoki Kaisha, Ltd. jointly developed an Exhaust Gas Cleaning System for marine applications that efficiently removes sulfur oxides (SOx) from exhaust gas emitted by marine diesel engines. The system was officially approved by Nippon Kaiji Kyokai (Class NK) as an alternative method for compliance with Regulation 14 of MARPOL AnnexⅥ on behalf of Panamanian Administration.
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