Young Duk Lee

Thankyou for your reply. 

I am not sure about the values of the reaction rate. but I am giving the equation:

r=4e15 exp(-196200/RT) /1000 

divided by thousand only for units balance as the fluent units are in kg.mol/(m3.s) and the equation is for g.mol/(m3.s) basis

with this the maximum reaction rate is 225.6 kg.mol/(m3.s).

I must inform that I extended the inlet before the reaction site and the molar fractions improved significantly. now I am getting measured inlet mole fraction of 0.93 with the given input of 0.99.