# 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 48: In order to prevent or reduce NOX emissions to air from the combustion of iron and steel process gases in CCGTs, BAT is to use one or a combination of the techniques given below.

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

Technique
Description
Applicability
a.
Process gas management system
See description in Section 8.2
Generally applicable within the constraints associated with the availability of different types of fuel
b.
Advanced control system
See description in Section 8.3.
This technique is used in combination with other techniques
The applicability to old combustion plants may be constrained by the need to retrofit the combustion system and/or control command system
c.
Water/steam addition
See description in Section 8.3.
In dual fuel gas turbines using DLN for the combustion of iron and steel process gases, water/steam addition is generally used when combusting natural gas
The applicability may be limited due to water availability
d.
Dry low-NOX burners(DLN)
See description in Section 8.3.
DLN that combust iron and steel process gases differ from those that combust natural gas only
Applicable within the constraints associated with the reactiveness of iron and steel process gases such as coke oven gas.
The applicability may be limited in the case of turbines where a retrofit package is not available or when water/steam addition systems are installed
e.
Low-NOX burners (LNB)
See description in Section 8.3
Only applicable to supplementary firing for heat recovery steam generators (HRSGs) of combined-cycle gas turbine (CCGT) combustion plants
f.
Selective catalytic reduction (SCR)
Retrofitting existing combustion plants may be constrained by the availability of sufficient space

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Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/4/division/4.2/division/4.2.2/division/2 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-4/division-4.2/division-4.2.2/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.