Upon successful completion of this part of the module, you will be able to:
· Select and use an appropriate shrinking core model to analyse experimental data and design reactors with specified, simple flow patterns in spherical, cylindrical and plane geometries.
· Formulate and solve simple axially dispersed plug flow models and be able to include and justify the use of Danckwerts Boundary Conditions and use appropriate values of axial Peclet number.
· Calculate pressure drops in packed beds over a wide range of particle Reynolds numbers and understand the critical role played by voidage in these equations.
· Derive and use the Carmen-Kozeny and Ergun equations in the appropriate situations.
· Derive and use Langmuir, Freundlich and Toth isotherm equations.
· Describe in detail experimental techniques to measure adsorption isotherms
· Select and use an appropriate model combining external film mass transfer, intra-particle diffusion and intrinsic surface kinetics.
· Design a simple catalytic PFR using the above models.
· Interpret experimental results in terms of these models.
· Specify additional experiments to distinguish between possible alternative models.
· Discuss the causes of loss of catalyst performance.
Fluid Bed Reactors
· Describe the three phase theory of Davidson and Harrison
· Describe the Kunii and Levenspiel model of FBRs
· Discuss the effects of bubble size and reaction kinetics on the conversion in comparison to CSTRs and PFRs
Case Studies – Describe and discuss:
· Car exhaust converters
· SEREBAR reactors for ground water treatment