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Table A2-2: CH4 emission factors used in the energy sector category
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| Emission factor t CH4/PJ |
Source | |
|---|---|---|
Natural gas |
||
Electricity – boilers |
2.745 |
IPCC Tier 2 (table 1–15) average for natural gas boilers and large gas-fired turbines >3 MW |
Commercial |
1.08 |
IPCC Tier 2 (table 1–19) natural gas boilers |
Residential |
0.9 |
IPCC Tier 2 (table 1–18) gas heaters |
Domestic transport (CNG) |
567 |
IPCC Tier 2 (table 1–43) passenger cars (uncontrolled) |
Other stationary (mainly industrial) |
1.26 |
IPCC Tier 2 (table 1–16) small natural gas boilers |
Liquid fuels |
||
Stationary sources |
||
Electricity – residual oil |
0.855 |
IPCC Tier 2 (table 1–15) residual oil boilers – normal firing |
Electricity – distillate oil |
0.855 |
IPCC Tier 2 (table 1–15) distillate oil boilers – normal firing |
Industrial (including refining) – residual oil |
2.85 |
IPCC Tier 2 (table 1–16) residual oil boilers |
Industrial – distillate oil |
0.19 |
IPCC Tier 2 (table 1–16) distillate oil boilers |
Industrial – LPG |
1.045 |
IPCC Tier 2 (table 1–18) propane/butane furnaces |
Commercial – residual oil |
1.33 |
IPCC Tier 2 (table 1–19) residual oil boilers |
Commercial – distillate oil |
0.665 |
IPCC Tier 2 (table 1–19) distillate oil boilers |
Commercial – LPG |
1.045 |
IPCC Tier 2 (table 1–18) propane/butane furnaces |
Residential – distillate oil |
0.665 |
IPCC Tier 2 (table 1–18) distillate oil furnaces |
Residential – LPG |
1.045 |
IPCC Tier 2 (table 1–18) propane/butane furnaces |
Agriculture – stationary |
3.8 |
IPCC Tier 2 (table 1–49) diesel engines (agriculture) |
Mobile sources |
||
LPG |
28.5 |
IPCC Tier 2 (table 1–44) passenger cars (uncontrolled) |
Petrol – 1990 onwards |
18.525 |
IPCC Tier 2 (table 1–27) passenger cars (uncontrolled – mid-point of average g/MJ) |
Diesel – 1990 onwards |
3.8 |
IPCC Tier 2 (table 1–32) passenger cars (uncontrolled – g/MJ) |
Navigation (fuel oil and diesel) |
6.65 |
IPCC Tier 2 (table 1–48) ocean-going ships |
Aviation fuel/kerosene |
1.9 |
IPCC Tier 2 (table 1–48) jet and turboprop aircraft |
Coal |
||
Combustion |
||
Electricity generation |
0.665 |
IPCC Tier 2 (table 1–15) pulverised bituminous combustion – dry bottom, wall fired |
Cement |
0.95 |
IPCC Tier 2 (table 1–17) cement, lime coal kilns |
Lime |
0.95 |
IPCC Tier 2 (table 1–17) cement, lime coal kilns |
Industry |
0.665 |
IPCC Tier 2 (table 1–16) dry bottom, wall fired coal boilers |
Commercial |
9.5 |
IPCC Tier 2 (table 1–19) coal boilers |
Residential |
285 |
IPCC Tier 1 (table 1–7) coal – residential |
Biomass |
||
Wood stoker boilers |
14.25 |
IPCC Tier 2 (table 1–16) wood stoker boilers |
Wood – fireplaces |
285 |
IPCC Tier 1 (table 1–7) wood – residential |
Biogas |
1.08 |
IPCC Tier 2 (table 1–19) gas boilers |
