Prompt NOX - Methane combustion
 

Dear all

I am using two-step Methane combustion reaction by Fluent, and my purpose is to calculate the Prompt NOX, to do that I need to calculate the Equivalence Ratio and the Fuel Carbon Number which is the number of carbon atoms per molecule of fuel.

-Two-step Methane Reactions:
1st reaction: CH4+1.5 O2 → CO + 2 H2O
2nd reaction: CO + 0.5 O2 → CO2

My question is that: To set the fuel carbon number, should I consider the 2nd reaction(number of carbon in CO) also or not?

Finally, Which one is right?
Fuel carbon number = 2 (including 1 carbon CH4 from 1st reaction and 1 carbon CO from 2nd reaction)
Fuel carbon number = 1 (including only 1 carbon in 1st reaction CH4)



Thank you in advance.

Fuel carbon number is based on atomic number of your fuel. Your fuel is CH4 not CO.

Thank you for your reply LuckyTran