134 Summary

Application of a Eulerian-Eulerian approach to modeling flow in fixed bed as well as trickle bed reactors is discussed. A methodology of applying computational flow modeling to enhance the performance of a radial flow fixed bed reactor is discussed with the help of an example. Realistic representation of the characteristics of the fixed bed (porosity distribution, degree of anisotropy and so on) is crucial for carrying out simulations for engineering use. Most of the current work relies on empirical information and pressure drop data to calibrate computational flow models of fixed and trickle bed reactors. Such calibrated computational flow models will be useful to understand issues related to mal-distribution, channeling, formation of hot spots etc. in these reactors. Recent work on application of computational flow models for other miscellaneous reactors is briefly reviewed. Computational flow models are being increasingly used in designing newer and specialty reactors such as chemical vapor deposition reactors or catalytic converters. To realize process intensification and performance enhancement, accurate knowledge of the underlying flow field in chemical reactors is essential. The approach and computational models developed in this book will allow the reactor engineer to harness the power of computational flow modeling for better reactor engineering.

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