Module 2: Thermodynamics of Combustion
  Lecture 8: Stoichiometry
 


Stoichiometry Calculation

Problem:

Gasoline Dry air Products (10.02% ; 5.62% ; 0.88% ; 83.48% )
Determine (i) A/F Ratio; (ii) Equivalence Ratio; (iii) Stoichiometric Air Used

Solution

  

Equation: 16.32 ( 3.76 ) 7.37 + 0.65 4.13 61.38 9

  ((12 8 ) 18)/(16.32(32 (3.76 28))) = 0.05089

Stoichiometric Equation:

 

 

12.5( 3.76 ) 8 9 47
  ((12 8 ) 18)/(12.5(32 (3.76 28))) = 0.06643

 

 Equivalence ratio 0.766

 

 Since <1 ; The mixture is lean
Stoichiometric Air Used:
 

Stoichiometric air = 100 / = 100/ 0.766 = 130.5%