L1 /
5
CH3041
THE COMBUSTION
PROCESS
• The quantities of 1o pollutants produced are
large, the average Qld car releases:
6 t /y CO2
265 kg /y combined other gases.
6 t /y CO2
265 kg /y combined other gases.
- around 2.5
million cars registered in Qld.
• The combustion of O2 & N2 that occurs in
a car engine is a radical reaction:
N2 + O2 ® 2NO (diatomics split apart)
a car engine is a radical reaction:
N2 + O2 ® 2NO (diatomics split apart)
• In the air: NO
+ O3 ® NO2 + O2
NO2 + hn (<420 nm) ® O
+ NO
O + O2 + M ® O3 + M (M
= third body)
NO2 + H2O ® NO + 2OH.
