Tuesday, October 20, 2020
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ABS: LNG, Hydrogen Lead Fuels for Shipping Decarbonization

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WMN.. LNG and hydrogen are viewed as frontrunner fuels to help shipping reach IMO decarbonization ambitions, according to a new ABS survey.
LNG was the solution to the 2050 emissions target for 47 per cent of respondents to the ABS survey, while hydrogen was the answer for 40 percent.
Just eight per cent opted for ammonia and five per cent for methanol, the classification society said in its statement.
LNG was again the dominant fuel option to get the industry to 2030 targets, securing the support of 64 per cent of respondents, against 22 per cent for hydrogen and seven per cent each for ammonia and methanol.
The results illustrate the challenges facing shipowners in developing fleets that meet and exceed IMO targets.
“Owners of internationally trading ships are facing increasingly complex investment decisions as they try to navigate the most efficient course to the low-carbon future, which is why ABS has moved to simplify the landscape by identifying three fuel pathways potentially open to shipping,” said Christopher J. Wiernicki, ABS chairman, president and CEO.
Light Gas pathway
The first pathway is defined as ‘Light Gas’, using generally light, small molecule fuels with high energy content, but more demanding, mainly cryogenic fuel supply systems and storage.
“This group includes the relatively mature methane (as LNG) solution leading towards bio-derived or synthetic methane, and ultimately to hydrogen as fuel,” said Wiernicki.
“On this pathway, if methane slip is discounted, LNG can reduce GHG emissions by approximately 20 per cent; bio-methane can be carbon neutral, while hydrogen is a zero-carbon fuel. Hydrogen can serve as the ultimate solution along this pathway, but it will necessitate significant technical advances, which may require a decade or more, until it becomes a practical solution.
Heavy Gas pathway
The second pathway is defined as ‘Heavy Gas’, by using generally heavier, more complex molecules, but with less demanding fuel supply and storage requirements than the light gas pathway.
“This group includes LPG, methanol and ethanol, leading to bio-derived or synthetic LPG/methanol and ultimately to ammonia,” Wiernicki said.
He added that on this pathway, methanol can reduce CO2 by approximately 10 percent, while bio-methanol can be carbon neutral, and ammonia is a zero-carbon fuel. While ammonia shows considerable promise as a fuel, the technology for its application still needs to be developed, and regulations must account for its particular safety considerations.
Bio/Synthetic fuels pathway
The third pathway hinges on bio/synthetic fuels that are derived from renewable sources and can produce liquid fuels.
“These fuels have similar properties to diesel oil and thus are much less demanding in terms of new infrastructure and technologies onboard and can be utilized with minimal changes to current ship designs,” Wiernicki said.
“In the future, a third generation of biofuels, such as lignocellulosic or algae-based fuels could potentially provide the industry with almost 500 million tons of fuels annually, more than the current annual bunker demand. This group includes electro/synthetic Gas-to-Liquid (GTL) fuels produced though either carbon capture and electrolysis, or from converting biomass to syngas and then to liquid fuels such as methanol or diesel.”
But which particular pathway makes sense for a shipowner to focus on will depend on the operational profile and trade of the vessel, cautioned Wiernicki.
“In all likelihood, the fleet of the future will be fueled by a variety of choices, including oil, that will be selected depending on the owner’s operational preferences,” he said.



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