Powering European ships with batteries, hydrogen or ammonia will decarbonise the fleet and require only half the amount of renewable electricity that less efficient solutions like synthetic methane or synthetic diesel will need, says NGO Transport & Environment (T&E).
The EU must set out in its 2050 Decarbonisation Strategy, to be published on 28 November, how it will end the use of fossil fuels in shipping, including marine fuel oil and liquified natural gas (LNG).
The Thursday (15 November) published report Roadmap to Decarbonising European Shipping commissioned by T&E found battery powered ships offering the most efficient and immediate solution to decarbonise short sea voyages within the EU, while longer journeys will ultimately require liquid hydrogen and liquid ammonia produced with zero-emission electricity.
Powering ships calling at EU ports with a combination of the three (battery, liquid hydrogen and liquid ammonia) would require around 25% additional renewable electricity compared to total EU electricity production today, the analysis finds – this is a considerable amount but still half of what is required by other options like synthetic methane or synthetic diesel.
“Shipping is the neglected stepchild of EU climate policy,” said Faig Abbasov, shipping officer at T&E.
“We need progress at international level coupled with practical steps in Europe such as investment in both shore-side charging stations and the production and bunkering infrastructure needed for hydrogen.
“A zero-emission shipping strategy in the EU would help cut pollution but also give European companies an edge in what will be some of the most important technologies of the future.”
The Roadmap to Decarbonising European Shipping report recommended smaller ships making shorter journeys within Europe to be the EU’s first target to convert to battery and hydrogen as their renewable energy requirements will be manageable.
But often touted solutions such as synthetic methane and synthetic diesel have major drawbacks, the analysis also finds. Their apparent physical properties are similar to their fossil equivalents, making it difficult for authorities to distinguish them and enforce their use. They also require far higher amounts of renewable energy than batteries, hydrogen and ammonia. Moreover, synthetic methane suffers from methane leakage and slip – as does fossil LNG.
T&E notes further investment in gas bunkering infrastructure would lock EU countries into using LNG, which does not offer a path to decarbonisation and in some cases is worse than other fossil fuels.
Such investment would also open the way for synthetic methane, which is inefficient and difficult to enforce. The small amounts of biofuels that can be produced sustainably would be better used in sectors which have no alternatives to using liquid fuels, such as aviation.
“We need to avoid wasting lots of time and money on solutions that can’t deliver shipping decarbonisation,” concludes Abbasov.
“The biggest pitfalls are biofuels, which can’t be scaled or enforced sustainably, especially in shipping.
“LNG and synthetic methane are other dead ends due to methane leakage and enforcement problems.”
The report Roadmap to Decarbonising European Shipping can be downloaded here.
Photo credit: Transport & Environment
Published: 19 November, 2018
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