Ammonia - Well-to-Wake by pathway
Ammonia well-to-wake intensity under FuelEU Maritime. Grey ammonia takes the Annex II natural-gas default, 123.95 gCO₂e/MJ, and so does blue ammonia unless certified (Art. 10(2)). Green ammonia, an RFNBO, takes E and eu from its Proof of Sustainability; without them, or above 28.2 gCO₂e/MJ, Art. 10(1)(b) counts it as grey.
- Tank-to-wake CO₂
- t
From Cf per MEPC.364(79)
- Energy content
- GJ
LCV 18.6 MJ/kg, Regulation (EU) 2023/1805 Annex II
- Well-to-wake GHG
- t CO₂e
123.95 gCO₂e/MJ WtW, NH3 (natural gas)
Formula, assumptions, limits
WtW factors include upstream extraction, processing, transport, plus tank-to-wake combustion and relevant CH₄/N₂O. FuelEU Maritime Annex II publishes the authoritative defaults.
In short
Well-to-wake GHG intensity of ammonia as marine fuel, by hydrogen-source pathway.