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Tier III Exhaust-After-Treatment orders for low-speed engines pass 1,000 mark

Press Release: MAN Energy Solutions’ Two-Stroke Business has announced that it has surpassed 1,000 orders for secondary-measure, Tier III-compliant, emission-reduction technology for its portfolio of MAN B&W-branded, low-speed engines.

Approximately one-quarter of the orders have been for EGR (Exhaust Gas Recirculation) systems, with SCR (Selective Catalytic Reduction) systems accounting for the remainder. The milestone was passed in early-January 2021 and is built upon references from the company’s portfolio of ME-B, ME-C and MC-C fuel-oil engines. Currently, almost half of all orders have entered active service.

Bjarne Foldager, Senior Vice President and Head of Two-Stroke Business at MAN Energy Solutions, said: “This is a notable milestone that is built on the know-how we have amassed over the past decade or so. Our fully-mature EGR and SCR systems not only achieve Tier III NOx-compliance, but also deliver performance upgrades for engines in terms of increased fuel efficiency and lower, general emissions. As such, our ability to treat a ship as a complete system gives us a clear market advantage that enables us to prioritise environmental considerations.”

Graphical rendering of an MAN B&W two-stroke engine with EGR system

NOx solutions

Exhaust gas recirculation (EGR) prevents the formation of NOx by controlling the combustion process, while Selective Catalytic Reduction (SCR) uses a catalyst and an additive to reduce the NOx generated by the combustion process.

Uniquely for the two-stroke sector, MAN Energy Solutions offers both EGR and SCR as proprietary NOx solutions, including both low- and high-pressure variants of the latter. The company has long experience with EGR technology and reported its first order already in 2011, while SCR-HP won its first order in January 2019 and features a drastically reduced reactor size compared to rival systems.

Header image: Rendering of an MAN B&W SCR-HP reactor with host two-stroke engine

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