Ozone Modelling

The Solvents Industry is committed to the improvement of air quality in Europe, and has been closely following scientific developments on air pollution. The European Commission issued a Thematic Strategy on Air Pollution in 2005, calling for further emission reductions by 2020 of about 340kt of Volatile Organic Compound (VOC) emissions from industrial solvents use based on modelling projections. In response to this, in 2006, ESIG commissioned two model runs and examined the results of a third independent model to project ozone levels following certain VOC regulatory measures. These three models were:

  • the Chimere Model developed by L'Institut National de l'Environnement Industriel et des Risques (INERIS) and used in French Government scenarios.
  • the LOTOSEUROS Model developed by Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek (TNO) in the Netherlands.
  • the Harwell Trajectory Model developed independently by Professor Richard Derwent and used to evaluate European ground-level ozone trends from 1990-2008.

The results :

  • The key finding from the Harwell is that the solvents industry has made a substantial contribution to the reduction of ground-level ozone and that the Solvents Emissions Directive has had a significant impact on the improvement of ozone air quality.
  • The key findings from the INERIS and TNO modeling exercises was that VOC emissions reductions will not deliver further sizeable ozone reduction once current legislation is fully implemented. Legislators and industry should therefore focus on implementing existing legislation rather than introducing additional VOC legislation.

Ozone SOMO35 Delta in % from 01/01/1997 to 31/12/1997

Aromatics emissions replaced
(by a mixture (50/50) of n-butyl
acetate and methyl-heptate

Xylene emissions replaced
mixture (50/50) of n-butyl
acetate and methyl-heptate

340kT removed across all

ceficResponsible Care
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