# Commission Implementing Decision (EU) 2017/1442 of 31 July 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for large combustion plants (notified under document C(2017) 5225) (Text with EEA relevance), Division BAT 54: In order to prevent or reduce CO emissions to air from the combustion of gaseous and/or liquid fuels in gas turbines on offshore platforms, BAT is to use one or a combination of the techniques given below.

Extent: E+W+S+N.I.

Technique
Description
Applicability
a.
Combustion optimisation
See descriptions in Section 8.3
Generally applicable
b.
Oxidation catalysts
Not applicable to combustion plants operated < 500 h/yr.
Retrofitting existing combustion plants may be constrained by the availability of sufficient space and by weight restrictions
Table 32
BAT-associated emission levels (BAT-AELs) for NOX emissions to air from the combustion of gaseous fuels in open-cycle gas turbines on offshore platforms
These BAT-AELs are based on > 70 % of baseload power available on the day.
This includes single fuel and dual fuel gas turbines.
The higher end of the BAT-AEL range is 250 mg/Nm3 if DLN burners are not applicable.
The lower end of the BAT-AEL range can be achieved with DLN burners.
Type of combustion plant
BAT-AELs (mg/Nm3)
Average over the sampling period
New gas turbine combusting gaseous fuels
15–50
Existing gas turbine combusting gaseous fuels
< 50–350
As an indication, the average CO emission levels over the sampling period will generally be:
< 100 mg/Nm3 for existing gas turbines combusting gaseous fuels on offshore platforms operated ≥ 1 500 h/yr,
< 75 mg/Nm3 for new gas turbines combusting gaseous fuels on offshore platforms.

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Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/4/division/4.3/division/3 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-4/division-4.3/division-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.