methane/air combustion
 

I have a problem in simulation methane-air combustion using detailed chemkin model. The final temperature is lower than the adiabatic flame temperature. I have used EDC model and inlet temperature of fuel (methane) is 373 and mass flow rate of 0.005kg/s and that of air is 0.0863 kg/s. Any one with some tips on how to go about this problem please help