# 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 72: In order to increase the energy efficiency of IGCC and gasification units, BAT is to use one or a combination of the techniques given in BAT 12 and below.

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

Technique
Description
Applicability
a.
Heat recovery from the gasification process
As the syngas needs to be cooled down to be cleaned further, energy can be recovered for producing additional steam to be added to the steam turbine cycle, enabling additional electrical power to be produced
Only applicable to IGCC units and to gasification units directly associated to boilers with syngas pretreatment that requires cooling down of the syngas
b.
Integration of gasification and combustion processes
The unit can be designed with full integration of the air supply unit (ASU) and the gas turbine, with all the air fed to the ASU being supplied (extracted) from the gas turbine compressor
The applicability is limited to IGCC units by the flexibility needs of the integrated plant to quickly provide the grid with electricity when renewable power plants are not available
c.
Dry feedstock feeding system
Use of a dry system for feeding the fuel to the gasifier, in order to improve the energy efficiency of the gasification process
Only applicable to new units
d.
High-temperature and -pressure gasification
Use of gasification technique with high-temperature and -pressure operating parameters, in order to maximise the efficiency of energy conversion
Only applicable to new units
e.
Design improvements
Design improvements, such as:
modifications of the gasifier refractory and/or cooling system,
installation of an expander to recover energy from the syngas pressure drop before combustion
Generally applicable to IGCC units
Table 42
BAT-associated energy efficiency levels (BAT-AEELs) for gasification and IGCC units
Type of combustion unit configuration
BAT-AEELs
Net electrical efficiency (%) of an IGCC unit
Net total fuel utilisation (%) of a new or existing gasification unit
New unit
Existing unit
Gasification unit directly associated to a boiler without prior syngas treatment
No BAT-AEEL
> 98
Gasification unit directly associated to a boiler with prior syngas treatment
No BAT-AEEL
> 91
IGCC unit
No BAT-AEEL
34–46
> 91

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Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/7/division/7.1.1/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-7/division-7.1.1/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.