A study by A.P. Moller - Maersk and Lloyds Register confirms that the best opportunities for decarbonizing shipping lie in finding new sustainable energy sources. Based on market projections, the best positioned fuels for research and development into net zero fuels for shipping are alcohol, biomethane, and ammonia. 

Energy efficiency has been and still is an important tool for Maersk to reduce CO2 emissions. Efficiency measures have positioned Maersk 10% ahead of the industry average. But getting to net zero requires a total shift in the way deep sea vessels are propelled. The shipping industry needs to introduce carbon neutral propulsion fuels and new technologies.  

“The main challenge is not at sea but on land,” explains Søren Toft, Maersk Chief Operating Officer. “Technology changes inside the vessels are minor when compared to the massive innovative solutions and fuel transformation that must be found to produce and distribute sustainable energy sources on a global scale. We need to have a commercially viable carbon neutral vessel in service 11 years from now.”    
 
These three fuel pathways have relatively similar cost projections but different challenges and opportunities. “It is too early to rule anything out completely, but we are confident that these three are the right places to start. Consequently, we will spend 80% of our focus on this working hypothesis and will keep the remaining 20% to look at other options,” points out Toft.  

“The next decade requires industry collaboration as shipping considers its decarbonisation options and looks closely at the potential of fuels like alcohol, biomethane and ammonia,” says LR CEO Alastair Marsh. “This joint modelling exercise between Lloyd’s Register and Maersk indicates that shipowners must invest for fuel flexibility and it is also clear that this transition presents more of an operating expenditure rather than capital expenditure challenge.” 

Alcohols (ethanol & methanol) are not a highly toxic liquid with various possible production pathways directly from biomass and/or via renewable hydrogen combined with carbon from either biomass or carbon capture. Existing solutions for handling the low flash point and for burning alcohols are well proven. Ethanol and methanol are fully mixable in the vessel’s bunker tanks, creating bunkering flexibility.

However, the transition of the industry towards alcohol-based solutions is yet to be defined. Biomethane on the other hand has a potential smooth transition given existing technology and infrastructure. The challenge however is ‘methane slip’ – the emission of unburned methane along the entire supply chain.  

Ammonia is truly carbon free and can be produced from renewable electricity. The energy conversion rate of this system is higher than that of biomaterial-based systems, but the production pathway cannot tap into potential energy sources as e.g. waste biomass. The main challenge for ammonia is that it is highly toxic and even small accidents can create major risks to the crew and the environment. The transition from current to future applications is also a huge challenge for ammonia.   
 
According to Maersk and Lloyds Register, batteries and fuel cells are unlikely to have an immediate role in propelling commercially viable carbon neutral deep-sea vessels. 
 
Shipping is responsible for 2-3% of global greenhouse gas (GHG) emissions, so the industry has significant potential to help create a carbon-neutral economy by 2050. Maersk is determined to play its part by leading the development and scaling of future solutions.   

Maersk contact details Concepción Boo Arias concepcionboo.arias@maersk.com Tel +45 24495026 

Lloyds Register contact details Nicola Good Nicola.good@lr.org Tel +44 7855 113 273

About Maersk 

A.P. Moller - Maersk is an integrated container logistics company working to connect and simplify its customers’ supply chains. As the global leader in shipping services, the company operates in 130 countries and employs roughly 76,000 people. 

About Lloyds Register 

We started out in 1760 as a marine classification society. Today, we're one of the world's leading providers of professional services for engineering and technology – improving safety and increasing the performance of critical infrastructures for clients in over 75 countries worldwide.  

The profits we generate fund the Lloyd's Register Foundation, a charity which supports science and engineeringrelated research, education and public engagement around everything we do. All of this helps us stand by the purpose that drives us every single day: Working together for a safer world. 

In a world of increasing complexity – overloaded with data and opinion - we know that our clients need more than technology to succeed. They need an experienced hand. A partner to listen, cut through the noise and focus on what really matters to them and their customers. Our engineers and technical experts are dedicated to assurance. That means a commitment to embracing new technology, and a deep-rooted desire to drive better performance. So we consider our customers' needs with diligence and empathy, then use our expertise and over 250 years' experience to deliver the smart solution for everyone. 

After all, there are some things technology can't replace. 

Anything you need, we’re here to help

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