Page 42 - Domestic Smoke Nuisance and Emissions Final_Neat

In practice combustion takes place in either Lean Oxygen <1

or Excess Oxygen = +2.

• Insufficient Oxygen (O ) • Excessive Oxygen (O )
2
2

<1 For fuel-rich i.e. insufficient Oxygen for complete > 1 For fuel-lean combustion - composition of products of

combustion to take place carbon monoxide hydrogen, combustion is determined by atom balance but will include the

and, unburned hydrocarbons (PAH-particulate matter) production CO, NOx, PAH (hydrocarbons-particulate matter)

remain in the combustion products plus CO, CO , H , H O,
2 2 2

N . Formation of creosotes
2

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