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SAFETY4SEA

The road to Alternative Fuels

by Panagiotis Bousounis
March 29, 2023
in Fuels, Opinions
FuelEU Maritime

Credit: Shutterstock

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During the 2023 SAFETY4SEA Limassol Forum, Panagiotis Bousounis, Cyprus Operations Manager, DNV Maritime, elaborated on the alternative fuel scenarios and explained that fuel flexibility and bridging of technologies will pave the way towards de-carbonization.

For shipping, it all started with the IMO strategy on the GHG reductions, following the 1.5 C goal of the Paris Agreement. In particular, shipping must reduce GHG emissions by 50% in 2050 and fully decarbonize within the century.

The road to Alternative Fuels

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Regulations such as EEXI and CII indexes are already in place making vessels more energy efficient and thus reducing their GHG footprint. However, sooner or later and definitely in the long run, there will be no other alternative for compliance than the use of Alternative Fuels.

Fuel options

Looking at the currently available fuels, we will need to consider those with the minimum carbon content such as LNG, LPG, methanol or biofuel blends. But since de-carbonization is our target, we may eventually need to go even further, to carbon-free fuels, such as Ammonia and Hydrogen.

What is the best alternative fuel option?

While evaluating each fuel option, we should try to answer 3 questions:

  • Is it fit for onboard use?
  • Is it commercially available?
  • Is it ‘well-to-wake’ carbon neutral?

Answering these questions can determine if and when a fuel can be a realistic option, with answer ‘no’ being a showstopper on each case.

To replace fuel oil with an alternative fuel onboard a ship, means having the necessary energy converter technology, a suitable storage and distribution system and relevant safety regulations in place.

  • LNG and LPG are considered already established technologies, with LNG in particular having expanded widely to other ship types during the last years, apart from LNG carriers.
  • Methanol and biofuel blends are considered available technologies. Methanol 2-stroke engines are already in production, making it an actual option for deep sea shipping. Safety aspects mainly due to methanol’s toxicity are taken into serious consideration within regulations.
  • Ammonia and Hydrogen need more time until their technology is considered mature enough for onboard use. Toxicity of ammonia and high flammability of hydrogen being high on the list of safety concerns.
  • Carbon Capture Systems – although not an alternative fuel but a way to continue using current fuels, is also an option but still on a preliminary stage, since onboard limitations introduce challenges to the application of CCS on ships.

In addition, an alternative fuel will need to climb the fuel evolution stairway, meaning to become commercially available on a global or regional level.

For each fuel, gradual steps are required that would affect and be affected by:

  • Global/regional availability
  • Supply and bunker infrastructure
  • Market price

The road to Alternative Fuels

Last but not least, any alternative fuel shall be originating from a carbon-neutral supply chain.

EU regulations and most probably IMO strategy yet to be revised in 2023, are focusing on the so called ‘well to wake’ GHG emissions. This means that the total GHG emitted throughout the complete energy supply chain of a fuel, from initial sources, production processes, up to the consumption onboard shall be carbon neutral.

In that respect, the potential fuel supply chains can be divided into 3 main families, depending on their energy source:

  • Biofuels – produced by the use of biomass.
  • Electrofuels – derived from renewable energy sources.
  • Blue fuels – traditionally produced fuels in combination with large scale Carbon Capture Systems

The road to Alternative Fuels

As shipping needs to switch to carbon-neutral energy supply chains, the sustainable energy should be directed to where it has the biggest global emission reduction potential.  Subject to numerous parameters, others close to shipping like a ship’s type or ship’s trading area and others all the way to the primary energy sources of fuels like availability and sustainability, there will eventually be plenty different scenarios and options towards compliance with the net-zero GHG target.

Instead of looking for the best alternative fuel option, it is expected that fuel flexibility and bridging of technologies will enable the existing and future fleets to reach de-carbonization.

Above article has been edited from Mr. Panagiotis Bousounis presentation during the 2023 SAFETY4SEA Limassol Forum.

Explore more by watching his video presentation here below

The views presented are only those of the author and do not necessarily reflect those of SAFETY4SEA and are for information sharing and discussion purposes only.

The road to Alternative FuelsThe road to Alternative Fuels
The road to Alternative FuelsThe road to Alternative Fuels
Tags: alternative fuelsMaritime KnowledgeSAFETY4SEAtechnology
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Panagiotis Bousounis

Panagiotis Bousounis

Panagiotis Bousounis is the Operations Manager of DNV in Limassol, Cyprus. He is responsible for DNV’s Maritime services to Cyprus-based customers and DNV-classed vessels calling Cypriot ports. In the past, Panagiotis has worked as an Approval Engineer at DNV’s Head Office in Oslo and as a Class and CAP surveyor for DNV in Piraeus. Panagiotis holds a Naval Architecture and Marine Engineering diploma from the National Technical University of Athens, Greece.

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