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Table A2.2

N2O emission factors used in the energy sector

  Emissions factor t N2O/PJ Source

Natural gas

   

Electricity generation

0.09

IPCC Tier 1 (table 1-8) natural gas - all uses

Commercial

2.07

IPCC Tier 2 (table 1-19) natural gas boilers

Residential

0.09

IPCC Tier 1 (table 1-8) natural gas - all uses

Domestic transport (CNG)

0.09

IPCC Tier 1 (table 1-8) natural gas - all uses

Other stationary (mainly industrial)

0.09

IPCC Tier 1 (table 1-8) natural gas - all uses

Liquid fuels

   

Stationary sources

   

Electricity - residual oil

0.285

IPCC Tier 2 (table 1-15) residual oil boilers -

normal firing

Electricity - distillate oil

0.38

IPCC Tier 2 (table 1-15) distillate oil boilers -

normal firing

Industrial (including refining) - residual oil

0.285

IPCC Tier 2 (table 1-16) residual oil boilers

Industrial - distillate oil

0.38

IPCC Tier 2 (table 1-16) distillate oil boilers

Commercial - residual oil

0.285

IPCC Tier 2 (table 1-19) residual oil boilers

Commercial - distillate oil

0.38

IPCC Tier 2 (table 1-19) distillate oil boilers

Residential (all oil)

0.19

IPCC Tier 2 (table 1-18) furnaces

LPG (all uses)

0.57

IPCC Tier 1 (table 1-8) oil - all sources except

aviation

Agriculture - stationary

0.38

IPCC Tier 2 (table 1-16) distillate oil boilers

Mobile Sources

   

LPG

0.57

IPCC Tier 1 (table 1-8) oil - all sources except

aviation

Petrol

1.42

IPCC Tier 2 (table 2.7 in 'Good practice...' (2000))

US gasoline vehicles (uncontrolled)

Diesel

3.7

IPCC Tier 2 (table 2.7 in 'Good practice...' (2000))

all US diesel vehicles

Fuel oil (ships)

1.9

IPCC Tier 2 (table 1-48) ocean going ships

Aviation fuel/kerosene

1.9

IPCC Tier 1 (table 1-8) oil - aviation

Coal

   

Electricity generation

1.52

IPCC Tier 2 (table 1-15) pulverised bituminous

combustion - dry bottom, wall fired

Cement

1.33

IPCC Tier 1 (table 1-8) coal - all uses

Lime

1.33

IPCC Tier 1 (table 1-8) coal - all uses

Industry

1.52

IPCC Tier 2 (table 1-16) dry bottom, wall fired coal

boilers

Commercial

1.33

IPCC Tier 1 (table 1-8) coal - all uses

Residential

1.33

IPCC Tier 1 (table 1-8) coal - all uses

Biomass

   

Wood (all uses)

3.8

IPCC Tier 1 (table 1-8) wood/wood waste - all

uses

Biogas

2.07

IPCC Tier 2 (table 1-19) natural gas boilers