LNG Methane Slip - GWP20 / GWP100 GHG

Methane-slip-corrected GHG footprint of an LNG DF engine using GWP_20 and GWP_100 factors - reveals the well-to-wake penalty of unburnt CH₄.

Methane slipLNGGHG

Methane slip% fuelLNG consumptiont/yr

CH₄ as CO₂eq (GWP100): 7,000t/yr

Total CO₂eq (GWP100): 34,500t/yr

Methane-slip penalty: 25.5%

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{CO}_{2,eq} = m_{CO_2} + GWP \cdot m_{CH_4}

Symbol	Meaning	Unit
$m_{CH_4}$	Unburnt methane	t/yr
$m_{CO_2}$	CO₂ from fuel combustion	t/yr

Source: IPCC AR6 WG1 Chapter 7; MEPC.364(79)

In short

Methane-slip-corrected GHG footprint of an LNG DF engine using GWP_20 and GWP_100 factors - reveals the well-to-wake penalty of unburnt CH\u2084.

Learn the theory Methane Slip and N2O: The Non-CO2 GHGs