Trickle Bed Reactors

Reactor Engineering & Applications


  • Vivek Ranade, CSIR, National Chemical Laboratory, Pune, India
  • Raghunath Chaudhari, Chemical & Petroleum Engineering Department, The University of Kansas, Lawrence, KS, USA
  • Prashant R. Gunjal, Tridiagonal Solutions Pvt. Ltd., Pune, India

This book provides a hybrid methodology for engineering of trickle bed reactors by integrating conventional reaction engineering models with state-of-the-art computational flow models. The content may be used in several ways and at various stages in the engineering process: it may be used as a basic resource for making appropriate reactor engineering decisions in practice; as study material for a course on reactor design, operation, or optimization of trickle bed reactors; or in solving practical reactor engineering problems. The authors assume some background knowledge of reactor engineering and numerical techniques.
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Chemical engineers working in industry (chemical companies, industrial research laboratories), as well as chemical engineering scientists and research students working in the area of reactor engineering.


Book information

  • Published: March 2011
  • Imprint: ELSEVIER
  • ISBN: 978-0-444-52738-7

Table of Contents

1 Introduction
1.1 Trickle bed reactors
1.1.1 Basic configuration and operation of trickle beds
1.1.2 Comparison with other reactors and applications
1.2 Reactor engineering of trickle bed reactors
1.2.1 Key issues
1.2.2 Multiscale approach for reactor engineering
1.3 Organization of this book
2 Hydrodynamics and Flow Regimes
2.1 Introduction
2.2 Flow regimes
2.2.1 Trickle flow regime
2.2.2 Pulse flow regime
2.2.3 Spray flow regime
2.2.4 Bubbling flow regime
2.3 Flow regime transition
2.4 Estimation of Key Hydrodynamic Parameters
2.4.1 Pressure drop
2.4.2 Liquid holdup
2.4.3 Wetting of catalyst particles
2.4.4 Gas-liquid mass transfer coefficient
2.4.5 Liquid-solid mass transfer coefficient
2.4.6 Gas-solid mass transfer
2.4.7 Axial dispersion
2.4.8 Heat transfer in trickle bed reactors
2.5 Summary
3 Reaction Engineering of Trickle Bed Reactors
3.1 Introduction
3.2 Overall rate of reaction
3.2.1 Completely wetted catalyst particles
3.2.2 Partially wetted catalyst particles
3.2.3 Exothermic reactions
3.3 Reactor performance models for trickle bed reactors
3.3.1 Empirical pseudo-homogeneous models
3.3.2 Generalized model for complete wetting of catalyst particle
3.3.3 Adiabatic trickle bed reactor model
3.3.4 Non-isothermal trickle bed reactor model: Complex reactions
3.3.5 Periodic operations in trickle bed reactors
3.4 Summary
4 Flow Modeling of Trickle Beds
4.1 Introduction
4.2 Characterization of packed beds
4.2.1 Randomly packed bed
4.2.2 Structured bed
4.3 Single phase flow through packed bed
4.3.1 Modeling approaches
4.3.2 Model equations and boundary conditions
4.3.3 Flow through an array of particles
4.3.4 Flow through a packed bed of randomly packed particles
4.4 Gas liquid flow through packed beds
4.4.1 Modeling of gas liquid flow through packed beds
4.4.2 Simulation of gas liquid flow in trickle beds
4.4.3 Simulation of reactions in trickle bed reactors
4.5 Summary
5 Reactor Performance and Scale-up
5.1 Introduction
5.2 Reactor performance
5.2.1 Effective reaction rate and performance
5.2.2 Particle characteristics
5.2.3 Gas-liquid distributor
5.2.4 Liquid maldistribution and performance
5.2.5 Residence time distribution
5.2.6 Periodic operation and performance
5.3 Trickle bed reactor design and scale up
5.3.1 Reactor scale-up/scale-down
5.3.2 Reactor scale-up methodologies
5.3.3 Reactor parameters, scale-up and performance
5.4 Engineering of trickle bed reactors
5.5 Summary
6 Applications and Recent Developments
6.1 Introduction
6.2 Examples of trickle bed reactor applications
6.2.1 Hydrogenation Reactions
6.2.2 Hydroprocessing Reactions
6.2.3 Oxidation Reactions
6.3 Recent Developments
6.3.1 Monolith Reactors
6.3.2 Micro-trickle bed reactors
6.4 Closure
Author Index
Subject Index