Help on premixed combustion heat

seaspace

I try to simulate 2-d premixed combustion of methane and air in porous media burner with a laminar flame. Overall reaction model(ch4+2o2--->co2+2h2o) based on Arrhenius reaction laws was employed.

When using the reaction model, one should have the exact velues of some related parameters,eg. the pre-exponential factor,heat of reaction per unit mass reactant and activation energy. After refering to some publications, I was confuseded completely because no any two papers have the same values.

What are the exact velues of the parameters on earth?

What should i do?

Thanks to any response!

Seaspace