# 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 75: In order to prevent or reduce dust, particulate-bound metal, ammonia and halogen emissions to air from IGCC plants, BAT is to use one or a combination of the techniques given below.

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

Technique
Description
Applicability
a.
Syngas filtration
Dedusting using fly ash cyclones, bag filters, ESPs and/or candle filters to remove fly ash and unconverted carbon. Bag filters and ESPs are used in the case of syngas temperatures up to 400 °C
Generally applicable
b.
Syngas tars and ashes recirculation to the gasifier
Tars and ashes with a high carbon content generated in the raw syngas are separated in cyclones and recirculated to the gasifier, in the case of a low syngas temperature at the gasifier outlet (< 1 100 °C)
c.
Syngas washing
Syngas passes through a water scrubber, downstream of other dedusting technique(s), where chlorides, ammonia, particles and halides are separated
Table 44
BAT-associated emission levels (BAT-AELs) for dust and particulate-bound metal emissions to air from IGCC plants
IGCC plant total rated thermal input(MWth)
BAT-AELs
Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V (mg/Nm3)(Average over the sampling period)
Hg (μg/Nm3)(Average over the sampling period)
Dust (mg/Nm3)(yearly average)
≥ 100
< 0,025
< 1
< 2,5

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Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/7/division/7.1.4/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-7/division-7.1.4/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.