A first order irreversible reaction is conducted in an 800 L continuously stirred tank, in liquid solution at 80 ᵒC temperature. The total conversion in the tank is calculated to be 60%. However, this conversion appears low.After a quick

CHEMICAL ENGINEERING CHEMICAL REACTION ENGINEERING QUESTION

When an exothermic reaction proceeds adiabatically in a mixed flow reactor (MFR), outline and explain the characteristic graph of the energy balance and material balance to show that multiple steady states may exist. Also, explain that among multiple steady states, there is an unstable steady state.

We are trying to perform a reaction with arbitrary kinetics using MFRs of different sizes in a series. By measuring the reaction rate against the concentration of the reactant, -r vs. Concentration Describe how to determine mouth temperature (the best adiabatic operation). 5) For each endothermic reaction and exothermic reaction, please explain which reactor type is optimal for adiabatic operation. A ÿ S, r ÿ When an arbitrary kinetics curve of is obtained and ÿ of each reactor is known, at each MFR. Explain how to obtain the outlet concentration of τ. Derive the appropriate equation and explain the process for calculating each concentration. Assume that there is no change in density during reaction.

A gas-phase reaction is being carried out in a 5-cm-diameter tubular reactor that is 2 m in length. The velocity inside the pipe is 2 cm/s. As a very first approximation, the gas properties can be taken as those of air (kinematic viscosity=0.01 cm2/s), and the diffusivities of the reacting species are approximately 0.005 cm2/s.(a)How many tanks in series would you suggest to model this reactor?(b)If the second-order reaction A+B⎯⎯→ C+D is carried out for the case of equimolar feed,and with CA0=0.01 mol/dm3, what conversion can be expected at a temperature for which k=25 dm3/mol.s?(c)How would your answers to parts (a) and (b) change if the fluid velocity was reduced to 0.1 cm/s?Increased to 1 m/s?(d)How would your answers to parts (a) and (b) change if the superficial velocity was 4 cm/s through a packed bed of 0.2-cm-diameter spheres?(e)How would your answers to parts (a) to (d) change if the fluid was a liquid with properties similar to water instead of a gas, and the diffusivity was…

The elementary gas-phase reaction A → 3B is carried out in a cylindrical batch reactor divided by a thin metallic membrane into two compartments of equal volume, as shown in the figure below. Pure A Pure I Initially one side is filled with pure 'A', and the other with an inert gas T. Both sides are at the same pressure (1 atm.), the same temperature, and contain the same number of moles. The reaction is carried out isothermally and the rate constant for the reaction is 0.1 min. a. After 10 minutes the membrane ruptures. What is the pressure differential rating of the membrane? What is the conversion at this time? b. If the mixture continues to react after the membrane is ruptured, how much longer does it take for the conversion to reach 90% (based on the initial moles of A)? c. Sketch the pressure versus time behavior for the entire duration. Mark all the important values on your diagram. HINT; Note that in each phase (before and after rupture) the reaction is occurring in a constant…