- Discuss the thermodynamic restrictions on the progress of reversible reactions.
- Develop an expression for the specific reaction rate constant based on activated complex theory.
- Distinguish between the methods available for establishing the kinetics of chemical reactions from the data obtained in a batch or continuous reactor.
- Compare the performances and merits of the plug flow and the stirred tank reactors behaving ideally.
- Derive expressions for the overall conversions for a reaction of known order.
- A homogeneous first order reaction is carried out in a batch reactor under adiabatic conditions. Develop a suitable method to find the relation temperature-conversion-time. State the assumptions made.
- Briefly explain the E and the F - curves. Draw the E and the F - curves for series and parallel combinations of one plug flow and one stirred tank reactors with unequal volumes. Comment.
- Differentiate between an elementary and a non-elementary reaction with suitable examples.
- What is understood by order of a chemical reaction? How is this different from "molecularity of the reaction", if a difference between the two exists.
- Discuss Arrhenius, Collision, and Transition state theories of temperature dependence of reaction rates.
- Derive an expression for the concentration in the N-th reactor, if N equal sized stirred tank reactors are assembled in series. Assume first order reaction.
- Discuss, how best you will arrange two unequal-sized stirred tank reactors for a given conversion and reaction order.
- Derive the relation between conversion and temperature for an adiabatic reactor using the energy balance and explain how you determine the reactor size for adiabatic operation of a plug flow and a stirred tank reactor.
- Discuss the principles of reactor stability and how it is established in a stirred tank reactor. Show qualitatively how endothermic reactions are always stable.
- Briefly discuss the models to explain the non-ideal behavior of tubular reactors. Describe one experiment to evaluate the parameters in any one of the models.
- What do you understand by "order of a reaction"? Indicate the methods available for determining the order of a given reaction.
- An elementary reaction A à
S, takes place in a mixed flow reactor. Find the condition for maximum concentration of R. What is its value? (Assume no R and S initially)
- "There exists a conversion below which the performance of a mixed flow reactor is better or at least equal to that of plug flow reactor for adiabatic exothermic reaction" - Explain.
- Discuss briefly the shrinking core model used for describing the global rate of fluid-solid non-catalytic reactions, and outline design methods for such reactions.
- Explain the different models for gas-solid non-catalytic reactions of the type,
A(g) + bB(s) à
E(g) + F(s)
- Discuss the differences between chemisorption and physical adsorption and their role in catalytic reactions.
- Discuss the effect of mass and heat transfer on the performance of industrial catalytic reactors.
- Compare the performance of fluidized-bed, trickle-bed and slurry reactors.
- A first order reaction is to be treated in a series of two mixed reactors. Show that the total volume of the two reactors is minimum when the reactors are equal in size.
- What is understood by 'optimum temperature progression'? Illustrate with an example of reversible exothermic reaction using a given feed material.
- Compare the performance of an adiabatic and an isothermal reactor, choosing an example of an exothermic reaction.