MAN books record orders for Tier III EGR and SCR system

Written by Nick Blenkey
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Graphical rendering of an MAN B&W two-stroke engine with EGR system

MAN Energy Solutions’ Two-Stroke Business has booked more than 1,000 orders for secondary-measure, IMO 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 the rest being for SCR (Selective Catalytic Reduction) systems accounting for the remainder.

The 1,000-order milestone was passed in early-January 2021 and is built on solutions for the company’s portfolio of ME-B, ME-C and MCC fuel-oil engines.

Currently, almost half of all the systems ordered have entered active service.

“This is a notable milestone that is built on the know-how we have amassed over the past decade or so,” said Bjarne Foldager, Senior Vice President and Head of Two-Stroke Business at MAN Energy Solutions “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 prioritize environmental considerations.”


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 in the combustion process.

MAN Energy Solutions is unique in the two-stroke sector in offering 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 back in 2011, while its first order for SCR-HP, which features a drastically reduced reactor size compared to rival systems, came in January 2019.

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