Directive 2001/80/EC of the European Parliament and of the Council (repealed)Show full title

ANNEX VI U.K. EMISSION LIMIT VALUES FOR NO_X (MEASURED AS NO₂)

A. NO_x emission limit values expressed in mg/Nm³ (O₂ content 6 % for solid fuels, 3 % for liquid and gaseous fuels) to be applied by new and existing plants pursuant to Article 4(1) and 4(3), respectively: U.K.

a Except in the case of the ‘Outermost Regions’ where the following values shall apply: Solid in general: 650 Solid with < 10 % vol comps: 1 300 Liquid: 450 Gaseous: 350
b Until 31 December 2015 plants of a rated thermal input greater than 500 MW, which from 2008 onwards do not operate more than 2 000 hours a year (rolling average over a period of five years), shall: in the case of plant licensed in accordance with Article 4(3)(a), be subject to a limit value for nitrogen oxide emissions (measured as NO2) of 600 mg/Nm3; In the case of plant subject to a national plan under Article 4(6), have their contribution to the national plan assessed on the basis of a limit value of 600 mg/Nm3. From 1 January 2016 such plants, which do not operate more than 1 500 hours a year (rolling average over a period of five years), shall be subject to a limit value for nitrogen oxide emissions (measured as NO2) of 450 mg/Nm3.
c Until 1 January 2018 in the case of plants that in the 12 month period ending on 1 January 2001 operated on, and continue to operate on, solid fuels whose volatile content is less than 10 %, 1 200 mg/Nm3 shall apply.
Type of fuel:	Limit valuesa(mg/Nm3)
Solidb,c:
50 to 500 MWth:	600
>500 MWth:	500
From 1 January 2016
50 to 500 MWth:	600
>500 MWth:	200
Liquid:
50 to 500 MWth:	450
>500 MWth:	400
Gaseous:
50 to 500 MWth:	300
>500 MWth:	200

B. NO_x emission limit values expressed in mg/Nm³ to be applied by new plants pursuant to Article 4(2) with the exception of gas turbines U.K.

Solid fuels (O₂ content 6 %) U.K.

a Except in the case of the ‘Outermost Regions’ where 300 mg/Nm3 shall apply.
Type of fuel	50 to 100 MWth	100 to 300 MWth	> 300 MWth
Biomass	400	300	200
General case	400	200a	200

Liquid fuels (O₂ content 3 %) U.K.

a Except in the case of the ‘Outermost Regions’ where 300 mg/Nm3 shall apply.
50 to 100 MWth	100 to 300 MWth	> 300 MWth
400	200a	200

In the case of two installations with a rated thermal input of 250 MWth on Crete and Rhodos to be licensed before 31 December 2007 the emission limit value of 400 mg/Nm³ shall apply.

Gaseous fuels (O₂ content 3 %) U.K.

	50 to 300 MWth	> 300 MWth
Natural gas (note 1)	150	100
Other gases	200	200

Gas Turbines U.K.

NO_x emission limit values expressed in mg/Nm³ (O₂ content 15 %) to be applied by a single gas turbine unit pursuant to Article 4(2) (the limit values apply only above 70 % load):

	> 50 MWth(thermal input at ISO conditions)
Natural gas (Note 1)	50(Note 2)
Liquid fuels (Note 3)	120
Gaseous fuels (other than natural gas)	120

Gas turbines for emergency use that operate less than 500 hours per year are excluded from these limit values. The operator of such plants is required to submit each year to the competent authority a record of such used time.

Note 1: U.K.

Natural gas is naturally occurring methane with not more than 20 % (by volume) of inerts and other constituents. U.K.

Note 2: U.K.

75 mg/Nm³ in the following cases, where the efficiency of the gas turbine is determined at ISO base load conditions: U.K.

• gas turbines, used in combined heat and power systems having an overall efficiency greater than 75 %;

• gas turbines used in combined cycle plants having an annual average overall electrical efficiency greater than 55 %;

• gas turbines for mechanical drives.

For single cycle gas turbines not falling into any of the above categories, but having an efficiency greater than 35 % - determined at ISO base load conditions - the emission limit value shall be 50*η/35 where η is the gas turbine efficiency expressed as a percentage (and at ISO base load conditions).

Note 3: U.K.

This emission limit value only applies to gas turbines firing light and middle distillates. U.K.