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CHEM 304 – 2/29/12

CHEM 304 – 2/29/12. I.D. Tropospheric chemistry : Air Pollution - Review Natural Tropospheric Chem. - Methane Oxidation - Generalized Hydrocarbon Oxidation Mechanism —> Photochemical Smog READ Ch.3, Ch.5, appendix on org. chem.

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CHEM 304 – 2/29/12

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  1. CHEM 304 – 2/29/12 I.D. Tropospheric chemistry: Air Pollution - Review Natural Tropospheric Chem. - Methane Oxidation - Generalized Hydrocarbon Oxidation Mechanism —> Photochemical Smog READ Ch.3, Ch.5, appendix on org. chem. Quiz Monday: Ozone Hole, natural Trop. Chem, Methane oxidation, Photo. Smog; HW # 5 & #6 (1-3).

  2. Pictorial view of Basic Tropospheric Chemistry …

  3. Hydrocarbon Oxidation (As generalized from CH4) R–CH3 + OH —> RCH2 + H2O R–CH2 + O2 —> R–CH2O2 R–CH2O2 + NO —> NO2 + R–CH2O NO2 + hn —> NO + O O2 + O + M —> O3 + M R–CH2O + O2 —> R–CHO + HO2 HO2 + NO —> NO2 + OH NET: R–CH3 + 4 O2 —> R–CHO + 2 O3 + H2O

  4. Primary Pollutants • Relative to “background” • More NO • - More NO –>NO2 • (From RO2) • (More O3) • - Increase demand for O(inc. production too!) Secondary Pollutants

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