Hlo I am trying to get kinetics of methanol to dimethyl ether kinetics on hzsm-5 si/al = 40 catalysts at 160 deg c I was unable to reach zeroth order kinetic regime. I am doubting that the reaction become mass transfer control before it reaches to zeroth order kinetics. Please let me know what will be the partial pressure of methanol when the reaction reaches zeroth order . Also I am using a fixed bed catalytic reactors where i change the flow rate of methanol to change the partial pressure and i am also injecting nitrogen along with the methanol where i am changing the methanol flow rate. Please let me know is this an ideal practice for getting kinetics. Please let me know
Thanks
Vignesh