# Commission Implementing Decision of 9 October 2014 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions, for the refining of mineral oil and gas (notified under document C(2014) 7155) (Text with EEA relevance) (2014/738/EU), Division BAT 8: In order to prevent and reduce ammonia (NH3) emissions to air when applying selective catalytic reduction (SCR) or selective non-catalytic reduction (SNCR) techniques, BAT is to maintain suitable operating conditions of the SCR or SNCR waste gas treatment systems, with the aim of limiting emissions of unreacted NH3.

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

BAT-associated emission levels: See Table 2.
Table 2
BAT-associated emission levels for ammonia (NH3) emissions to air for a combustion or process unit where SCR or SNCR techniques are used
The higher end of the range is associated with higher inlet NOX concentrations, higher NOX reduction rates and the ageing of the catalyst.
The lower end of the range is associated with the use of the SCR technique.
Parameter
BAT-AELz(monthly average)mg/Nm3
Ammonia expressed as NH3
< 5 – 15

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Source: https://www.legislation.gov.uk/eudn/2014/738/annex/division/3/division/1.1/division/1.1.5/division/BATn1 (the official version)
Page: https://openlegislation.uk/eu-decision-2014-738/annex/division-3/division-1.1/division-1.1.5/division-BATn1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.