For many Parties, N2O from Road Transportation will
be a likely key
category. Parties should be collecting detailed vehicle
activity
data (i.e., fuel use or kilometers traveled) by fuel type
(i.e., diesel oil or gasoline)
and by emission control technology. As shown in the table below,
N2O emission rates can vary dramatically (i.e., by
an order of magnitude) due to the effect of different vehicle
control technologies. |
Table 2 : Updated Emission Factors for USA Gasoline
Vehicles.
|
Control Technology
|
(g N2O/kg fuel)
|
(g N2O/MJ) |
Low Emission Vehicle (low sulfur fuel)
|
0.20
|
0.0045 |
Three-Way Catalyst (USA Tier 1)
|
0.32
|
0.0073 |
Early Three-Way Catalyst (USA Tier 0)
|
0.54
|
0.012 |
Oxidation Catalyst
|
0.27
|
0.0061 |
Non-Catalyst Control
|
0.062
|
0.0014 |
Uncontrolled
|
0.065
|
0.0015 |
|
|
Source: IPCC
Good Practice Guidance, Table 2.6.
Fuel combustion open burning conditions (e.g., coal stoves,
fire places, and wood burning stoves) can be a significant
source of methane for some Parties. For example, methane emission
factors for wood stoves are often two orders of magnitude
greater than for internal combustion sources. |
