{
  "url": "https://openlegislation.uk/eu-decision-2017-2117/annex/division-2/division-2.1/division-2.1.2/division-BAT",
  "json_url": "https://openlegislation.uk/eu-decision-2017-2117/annex/division-2/division-2.1/division-2.1.2/division-BAT.json",
  "legislation": "eudn/2017/2117",
  "legislation_title": "Commission Implementing Decision (EU) 2017/2117 of 21 November 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for the production of large volume organic chemicals (notified under document C(2017) 7469) (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2017-2117",
  "path": "annex/division/2/division/2.1/division/2.1.2/division/BAT",
  "kind": "division",
  "number": "BAT 20:",
  "heading": "In order to reduce emissions to air of dust and CO from the decoking of the cracker tubes, BAT is to use an appropriate combination of the techniques to reduce the frequency of decoking given below and one or a combination of the abatement techniques given below.",
  "text": "Technique\nDescription\nApplicability\nTechniques to reduce the frequency of decoking\na.\nTube materials that retard coke formation\nNickel present at the surface of the tubes catalyses coke formation. Employing materials that have lower nickel levels, or coating the interior tube surface with an inert material, can therefore retard the rate of coke build-up\nOnly applicable to new units or major plant upgrades\nb.\nDoping of the raw material feed with sulphur compounds\nAs nickel sulphides do not catalyse coke formation, doping the feed with sulphur compounds when they are not already present at the desired level can also help retard the build-up of coke, as this will promote the passivation of the tube surface\nGenerally applicable\nc.\nOptimisation of thermal decoking\nOptimisation of operating conditions, i.e. airflow, temperature and steam content across the decoking cycle, to maximise coke removal\nGenerally applicable\nAbatement techniques\nd.\nWet dust scrubbing\nSee Section 12.1\nGenerally applicable\ne.\nDry cyclone\nSee Section 12.1\nGenerally applicable\nf.\nCombustion of decoking waste gas in process furnace/heater\nThe decoking waste gas stream is passed through the process furnace/heater during decoking where the coke particles (and CO) are further combusted\nApplicability for existing plants may be restricted by the design of the pipework systems or fire-duty restrictions",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eudn/2017/2117/annex/division/2/division/2.1/division/2.1.2/division/BAT",
    "retrieved_at": "2026-11-01T15:13:18.480772+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}