ENAC-SSIE Laboratoire de Pollution de l'Air. O 2 + h →O + O O + O 2 + M→O 3 + M In the stratosphere (U.V. radiation): NO 2 + h →NO + O O + O 2 + M→O 3.

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ENAC-SSIE Laboratoire de Pollution de l'Air

O 2 + h →O + O O + O 2 + M→O 3 + M In the stratosphere (U.V. radiation): NO 2 + h →NO + O O + O 2 + M→O 3 + M In the troposphere (visible radiation): Ozone Formation NO 2 + O 2 + h ↔NO + O 3

ENAC-SSIE Laboratoire de Pollution de l'Air

Hydrocarbons C H CC C H H H H H H H H H C H H H H C H C C C H H H H H H H Methane Alcane Alcene Aromatic C C H H H H H H C C C C

ENAC-SSIE Laboratoire de Pollution de l'Air

NO 2 + O 2 + h ↔NO + O 3 OH + RH + O 2 → H 2 O + RO 2 RO 2 + NO→ NO 2 + RHO + HO 2 HO 2 + NO→ NO 2 + OH OH + NO 2 → HNO 3 Ozone Formation Photochemical equilibrium Competition

ENAC-SSIE Laboratoire de Pollution de l'Air