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Greenhouse exhaust emissions a main concern for ships 

As ships carry passengers and cargo throughout the world, they produce exhaust emissions that have a damaging impact on fragile ecosystems. Finding ways to reduce emissions and make ships greener is an important factor for the future of the marine sector. 

Emission regulations becoming even tougher


The shipping industry is responsible for transporting over 95% of all goods traded around the world today. Many ships, like cruise liners and tugs, travel in environmentally sensitive areas. To do so, their engines need to meet very strict emission regulations. IMO Tier III, Emission Control Area (ECA) and Energy Efficiency Design Index (EEDI) regulations define the limits for all vessels sailing in international waters. The global response to the devastating effects of pollution and global warming on marine ecosystems is to adopt even tougher rules for emissions, as seen at the 2015 Paris Climate Conference (COP21).

Keeping hazardous greenhouse emissions to a minimum is a top priority. At the same time, it is also important to not sacrifice ship engine performance and propulsion efficiency. To ensure the future viability of their fleets, ship owners and operators need to do everything they can to minimize the carbon footprint of their vessels. They need to constantly reduce NOx and SOx emissions to stay ahead of ever stricter legislation as it emerges. This means finding and using alternative fuels while utilizing available technologies to operate the cleanest ships possible.




target global temperature limit increase set in Global Shipping’s Action Plan
in emission reductions possible through energy efficiency, according to the Int. Energy Agency (IEA)
reduction in NOx emissions possible with MAN SCR (Selective Catalytic Reduction)

MAN solutions to reduce emissions at sea

MAN Emission Control technologies reduce a ship's emissions through technologies to improve efficiency and utilize cleaner fuels. In this way, we help ships meet all current and future regulations while ensuring a lower impact on the environment.

We offer our Emission Control technologies as part of MAN ECO CONTROL, a portfolio of technologies that will help optimize ship performance in terms of emissions, economy and operation. Ship operators benefit from smart processes, efficient operation and predictive maintenance services.


Battery-hybrid solutions


MAN Energy Solutions offers marine battery-hybrid systems, which combine combustion engines with additional batteries to capture and store electric power, optimizing engine operation while reducing emissions. We acquired a 40 percent stake in Aspin Kemp & Associates (AKA), a specialist in the integration of electric propulsion and energy storage systems to enhance our expertise and range of products in this field.

We also offer fully customized hybrid propulsion systems in which mechanical and electric engines work together. These are ideal for vessels with flexible operation profiles and running hours with varying power demands. Our versatile MAN HyProp ECO package combines a CP propeller, diesel engine and electric shaft machine to ensure the highest efficiency and lowest emissions in all operating modes – optimized to meet your vessel’s specific needs.

How you benefit:

  • Fewer NOx, SOx and CO2 emissions
  • Zero emissions when just batteries are used (especially at slow speeds)
  • Increased fuel efficiency
  • Quieter operation
  • Batteries reduce transient loads, preventing black smoke during maneuvering
  • Wide range of operation modes
  • Improved performance

Dual Fuel & LNG Gas

Graphic DualFuel LNG Gas Supply

After our 2016 acquisition of Cryo AB, a manufacturer of cryogenic equipment with over 50 years’ experience in cleaner burning Liquefied Natural Gases (LNG), MAN Energy Solutions created the MAN Cryo product brand – the perfect complement to our dual fuel engines. We offer solutions for comprehensive engine and environmentally friendly fuel gas supply systems (FGSS), offshore and onshore bunkering systems, and stationary distribution systems for regasification or fuel filling – all from a single source.

We can tailor our dual fuel propulsion systems to meet every requirement: from LNG technology for dual fuel propulsion to complete LNG handling systems (including carriers, floating storage and regasification units, feeder and bunker vessels).

How you benefit:

  • Clean burning gas, fewer NOx emissions
  • Increased fuel efficiency
  • Lower operating costs
  • Dual fuel system means flexibility and fuel independence
  • One point of contact for all components, training and support

Exhaust Gas After Treatment

We offer proven exhaust gas after treatment systems that meet the International Maritime Organization’s strict regulations for NOx emissions and fuel sulfur content, even in Emission Control Areas (ECA). Selective catalytic reduction (SCR) and exhaust gas recirculation (EGR) are highly effective technologies to minimize harmful NOx emissions.

Our MAN SCR system is an integrated solution available in 14 different sizes for our entire range of four-stroke medium speed engines. It induces chemical reactions in engine exhaust gases to convert harmful substances into environmentally safe ones. We can also customize MAN SCR systems for new buildings and retrofits upon request.

How you benefit:

  • Reduce NOx emissions up to 90%
  • IMO Tier III compliance in ECA
  • Increased fuel efficiency
  • Increased power density
  • One source, one point of contact
  • Minimum costs, maximum flexibility


Service solutions for optimum cost-efficiency 

MAN PrimeServ offers advanced modernization solutions to optimize the reliability, availability, and economic efficiency of existing equipment. Furthermore, MAN’s modernization and retrofit solutions are tailor-made to customers’ specific applications and machinery.

To MAN PrimeServ

MAN PrimeServ
total plant efficiencies for Combined Heat & Power applications
installed capacity since 1985




World’s first container ship converted to dual fuel

Our Emission Control solutions are designed to meet a wide range of customer requirements and applications while improving their overall environmental impact.

Customer:Wessels Reederei GmbH & Co. KG

Retrofit container ship to dual fuel (LNG)

Location: Germany
Completion:August 2017
Commercial Operation:07 / 2015
MAN’s Work Scope:

MAN multi-fuel, four-stroke MAN 51/60DF engine, supplied all conversion components

Watch video on YouTube

Forward-looking Emission Control solutions ensure the viability and profitability of the marine industry

  • Reduced emissions for an improved greenhouse footprint, meeting all regulations
  • Technologies to use alternative and cleaner burning fuels (LNG)
  • Increase fuel efficiency for reduced costs
  • Improved engine performance and flexibility
Contact us


Related news

Thursday, February 11, 2021

Tier III Exhaust-After-Treatment Orders for Low-Speed Engines Pass 1,000 Mark

Exhaust Gas Recirculation and Selective Catalytic Reduction systems slash NOx and benefit efficiency

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.” 

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.


  • MAN_ES_PR_1000_TierIII_engines_ENG
    PDF, 180 KB English
  • MAN_ES_PM_1000_TierIII_Motoren_GER
    PDF, 190 KB English


  • MAN_ES_SCR_Two_Stroke
    JPG, 831 KB English
  • MAN_ES_EGR_ME-GA_engine
    JPG, 191 KB English


Nils Søholt

Trade Press Marine

Group Communications & MarktingMAN Energy SolutionsTeglholmsgade 412450 Copenhagen SVDenmark

t +45 33 85 26 69

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