The Reynolds No. in your lab unit is 23 and the Peclet No. is 49.  The reactor which we have designed has Reynolds No. 68 and Peclet No. 54. Thus, our design is suitable. The pressure drop calculated for the lab reactor comes out to be very high. This might be due to the viscosity value taken after the reaction is over. What is the viscosity before the reaction starts ? We will have to take the average value of viscosity in the reactor to calculate the pressure drop.