Ammonia - Well-to-Wake by pathway
Grey (SMR), blue (SMR + CCS), green (electrolytic). Zero tank-to-wake CO₂; WtW depends on upstream hydrogen source and captures the N₂O penalty from combustion.
Tank-to-wake CO₂
0.00t
From Cf per MEPC.364(79)
Energy content
18,600GJ
LCV 18.6 MJ/kg
Well-to-wake GHG
11.2t CO₂e
0.6 gCO₂e/MJ WtW
Method
TTW CO₂ (t) = mass × Cf Energy (MJ) = mass (kg) × LCV (MJ/kg) WtW (t CO₂e) = Energy (MJ) × WtW factor (g/MJ) / 1e6
WtW factors include upstream extraction, processing, transport, plus tank-to-wake combustion and relevant CH₄/N₂O. FuelEU Maritime Annex II publishes the authoritative defaults.