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Maresk has announced construction of dual fueled ships. Either low sulfur diesel fuel (usually No. 6, the heaviest black stuff available) or green methanol.

The methanol propulsion configuration for the new vessel will be developed by MAN Energy Solutions and Hyundai Engine Machinery.

Eight ships under contract. First to arrive in 1Q 2024.

Green methanol requires combining green hydrogen (probably by electrolysis of water with clean electricity) with captured carbon dioxide. Carbon dioxide is available from ethanol fermentation plants and probably breweries. Easiest is to capture it from the exhaust gases of a natural gas fired power plant. There is some capture from air technology but that requires processing lots of air to get the 400 ppb carbon dioxide.

Global supply implies green methanol plants all over the globe. But methanol is methanol. Green methanol plants can swap product with other plants to minimize transportation costs.

This is another example of converting intermittent electricity from solar or wind into hydrogen for conversion into a fuel that is easy to ship. Ideal locations would be where you find abundant green electricity sources near seaports: Texas, California, Gulf Coast come to mind.
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"Green" methanol can also hypothetically be produced with mostly biological origin. I.e. capture methane from landfill or farm waste, converts pretty easily to methanol for a liquid fuel.
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