# 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 34: In order to prevent or reduce SOX, HCl and HF emissions to air from the combustion of HFO and/or gas oil in reciprocating engines, BAT is to use one or a combination of the techniques given below.

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

Technique
Description
Applicability
a.
Fuel choice
See descriptions in Section 8.4
Applicable within the constraints associated with the availability of different types of fuel, which may be impacted by the energy policy of the Member State
b.
Duct sorbent injection (DSI)
There may be technical restrictions in the case of existing combustion plants
Not applicable to combustion plants operated < 500 h/yr
c.
Wet flue-gas desulphurisation (wet FGD)
There may be technical and economic restrictions for applying the technique to combustion plants of < 300 MWth.
Not applicable to combustion plants operated < 500 h/yr.
There may be technical and economic restrictions for retrofitting existing combustion plants operated between 500 h/yr and 1 500 h/yr
Table 19
BAT-associated emission levels (BAT-AELs) for SO2 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.
For plants operated < 500 h/yr, these levels are indicative.
The higher end of the BAT-AEL range is 280 mg/Nm3 if no secondary abatement technique can be applied. This corresponds to a sulphur content of the fuel of 0,5 wt-% (dry).
Combustion plant total rated thermal input(MWth)
BAT-AELs for SO2 (mg/Nm3)
Yearly average
Daily average or average over the sampling period
New plant
Existing plant
New plant
Existing plant
All sizes
45–100
100–200
60–110
105–235

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Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/3/division/3.2/division/3.2.3/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-3/division-3.2/division-3.2.3/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.