MnrAq

290 Third IMO GHG Study 2014
• As stated above, we have two scenarios on ECAs and fuel use. The first scenario has a constant share
of fuel used in ECAs, and we assume that half of the fuel consumption in current ECAs will be in
NECAs from 2016 and the other half from 2025. The other scenario projects a doubling of the share
of fuel used in ECAs. We assume that the NO x Tier III requirements for the new ECAs come into force
in 2030.
Scenario
Table 64 – NO x emissions factors (g/g fuel)
Fuel type
Year
2012 2030 2050
Global average, low ECA, low LNG scenario HFO 0.0903 0.0825 0.0760
MGO 0.0961 0.0877 0.0808
LNG 0.0140 0.0140 0.0140
Global average, high ECA, high LNG scenario HFO 0.0903 0.0834 0.0690
MGO 0.0961 0.0887 0.0734
LNG 0.0140 0.0140 0.0140
Note that the lower emissions factor for NO x in the low LNG scenario in 2030 is the result of the fact that this
scenario requires more ships to use SCR or EGR to meet Tier III instead of switching to LNG.
NMVOC
The emissions of non-methane volatile organic compounds result from incomplete combustion of fuels. They
are assumed to be constant over time.
Region
Table 65 – NMVOC emissions factors (g/g fuel)
Fuel type
Year
2012 2030 2050
Global HFO 0.00308 0.00308 0.00308
LSFO 0.00308 0.00308 0.00308
MGO 0.00308 0.00308 0.00308
LNG 0.003 0.003 0.003
CO
The emissions of carbon monoxide result from incomplete combustion of fuels. They are assumed to be
constant over time.
Region
Table 66 – CO emissions factors (g/g fuel)
Fuel type
Year
2012 2030 2050
Global HFO 0.00277 0.00277 0.00277
LSFO 0.00277 0.00277 0.00277
MGO 0.00277 0.00277 0.00277
LNG 0.00783 0.00783 0.00783