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CATALYTIC OZONE DESTRUCTION [1 record]

Record 1 2012-06-13

English

Subject field(s)
  • Chemistry
  • Pollutants
DEF

Catalytic splitting of ozone molecules into atomic and diatomic oxygen.

OBS

The chlorine and nitrogen radicals may interact through ClO + NO2 = ClNO3 forming chlorine nitrate. This could be an important reaction from the point of view of ozone photochemistry because it removed radicals from both the chlorine and nitrogen systems, and it is these radicals that may play such a large role in the catalytic destruction of ozone.

French

Domaine(s)
  • Chimie
  • Agents de pollution
DEF

Séparation des molécules d'ozone, soumises à une chaîne catalytique, en oxygène atomique et diatomique.

OBS

Dans le premier maillon de la chaîne : O3+C1=C10+O2, le chlore apparaît comme un catalyseur qui sépare l'ozone. Dans le maillon suivant : C10+O=C1+O2, on voit que, d'une part, le catalyseur s'est reformé et est prêt à commencer un nouveau cycle de destruction et que, d'autre part, le bilan de cette chaîne, O3=O+O2, est la disparition pure et simple de l'ozone. Le monoxyde d'azote (NO) représente un autre agent de destruction catalytique de l'ozone; son efficacité comme catalyseur est six fois moindre que celle du chlore.

Spanish

Campo(s) temático(s)
  • Química
  • Agentes contaminantes
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