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VLSFO - Well-to-Wake

VLSFO (≤0.50% S) takes the FuelEU Annex II row for its ISO 8217 grade, not its sulfur content: as RME to RMK it is the HFO row, 91.74 gCO₂e/MJ on an LCV of 40.5 MJ/kg.

FuelVLSFOwtw
Tank-to-wake CO₂
3,114.00t
From Cf per MEPC.364(79)
Energy content
40,500GJ
LCV 40.5 MJ/kg, Regulation (EU) 2023/1805 Annex II
Well-to-wake GHG
3,715.6t CO₂e
91.74 gCO₂e/MJ WtW, HFO, ISO 8217 grades RME to RMK

Formula, assumptions, limits

TTW CO2 (t)=mass⋅Cf\text{TTW CO}_2 \text{ (t)} = \text{mass} \cdot C_fEnergy (MJ)=mass (kg)⋅LCV (MJ/kg)\text{Energy (MJ)} = \text{mass (kg)} \cdot \text{LCV (MJ/kg)}WtW (t CO2e)=Energy (MJ)⋅WtW factor (g/MJ)106\text{WtW (t CO}_2 \text{e)} = \frac{\text{Energy (MJ)} \cdot \text{WtW factor (g/MJ)}}{10^6}

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

VLSFO (≤0.50 % sulphur) CO₂ and well-to-wake GHG per tonne.

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