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Evolution and Air Quality Benefits of Arizona Cleaner Burning Gasoline

Evolution and Air Quality Benefits of Arizona Cleaner Burning Gasoline. Essential Services Task Force January 5, 2004 Ira Domsky Deputy Director Air Quality Division. Overview. Gasoline properties and automobile emissions History of CBG standards Air quality benefits.

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Evolution and Air Quality Benefits of Arizona Cleaner Burning Gasoline

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  1. Evolution and Air Quality Benefits of Arizona Cleaner Burning Gasoline Essential Services Task Force January 5, 2004 Ira Domsky Deputy Director Air Quality Division

  2. Overview • Gasoline properties and automobile emissions • History of CBG standards • Air quality benefits

  3. Gasoline Properties and Emissions • Pollutants of Concern • Carbon Monoxide • Hydrocarbons – evaporative and tailpipe • Oxides of Nitrogen • Hazardous Air Pollutants • Benzene • Butadiene • Aldehydes • Other products of incomplete combustion

  4. Gasoline Properties and Emissions • Gasoline Properties • Octane or anti-knock index • Volatility • Distillation “curve” • Oxygen • Sulfur • Aromatic hydrocarbons • Olefins • Benzene

  5. Gasoline Properties and Emissions • Always regulated for driveability (poor driveability results in high emissions) • Octane • Volatility • Distillation • Regulated specifically for emissions control • All the rest

  6. Evolution of CBG Standards • Common theme: • Many changes to gasoline standards adopted in Maricopa County have been driven by citizen lawsuits under the Clean Air Act • Some changes were fostered by enlightened self-interest: • Achieving attainment was good for business as well as public health

  7. Evolution of CBG Standards • Why gasoline standards are attractive emission control strategies • Emission reductions are relatively large • Automobiles account for the majority or a plurality of pollution • No changes to engines or other technology are necessary • Reduces emissions for all vehicle trips • Everyone who uses gasoline pays

  8. Evolution of CBG Standards

  9. Air Quality Benefits • Cumulative Improvements

  10. Air Quality Benefits Standard

  11. Air Quality Benefits Standard

  12. Air Quality Benefits

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