# 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 33: In order to prevent or reduce emissions of CO and volatile organic compounds to air from the combustion of HFO and/or gas oil in reciprocating engines, BAT is to use one or both of the techniques given below.

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

Technique
Description
Applicability
a.
Combustion optimisation
Generally applicable
b.
Oxidation catalysts
See descriptions in Section 8.3
Not applicable to combustion plants operated < 500 h/yr.
The applicability may be limited by the sulphur content of the fuel
Table 18
BAT-associated emission levels (BAT-AELs) for NOX emissions to air from the combustion of HFO and/or gas oil in reciprocating engines
These BAT-AELs do not apply to plants operated < 1 500 h/yr or to plants that cannot be fitted with secondary abatement techniques.
The BAT-AEL range is 1 150–1 900 mg/Nm3 for plants operated < 1 500 h/yr and for plants that cannot be fitted with secondary abatement techniques.
For plants operated < 500 h/yr, these levels are indicative.
For plants including units of < 20 MWth combusting HFO, the higher end of the BAT-AEL range applying to those units is 225 mg/Nm3.
Combustion plant total rated thermal input(MWth)
BAT-AELs (mg/Nm3)
Yearly average
Daily average or average over the sampling period
New plant
Existing plant
New plant
Existing plant
≥ 50
115–190
125–625
145–300
150–750
As an indication, for existing combustion plants burning only HFO and operated ≥ 1 500 h/yr or new combustion plants burning only HFO,
the yearly average CO emission levels will generally be 50–175 mg/Nm3,
the average over the sampling period for TVOC emission levels will generally be 10–40 mg/Nm3.

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Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/3/division/3.2/division/3.2.2/division/2 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-3/division-3.2/division-3.2.2/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.