**Chemical Reaction Engineering **

**Paper Code: CHE 504**

**Module: I**

Introduction; Definition of reaction rate;**Kinetics of homogeneous reaction:** Concentration-dependent term of a rate equation, single and multiple reaction, Elementary & Nonelementary reactions, kinetic view of equilibrium for elementary reactions, Molecularity and order of reaction, Representation of reaction rate, Kinetics for non elementary reactions, related problems, Temperature dependent term of a rate equation: Arrhenius law, Collision theory, Transition-state Theory, related problems;

**Interpretation of batch reactor data:** Constant-volume batch reactor, Integral method of analysis of data: General Procedure, Irreversible unimolecular-type First-order Reaction, Irreversible Bimolecular-type Second-order Reactions, Empirical Rate Equations of nth Order, Zero-order Reactions, Over-all Order of Irreversible Reactions from the Half-life, Irreversible Reactions in Parallel, Autocatalytic reactions, Irreversible reactions in series, First-order Reversible Reactions,

Differential method of Analysis of data: Analysis of the Complete Rate Equation, Partial analysis of rate equation, Variable-Volume Batch Reactor: Differential method of analysis, Integral method of Analysis: Zero-order Reactions, Firstorder Reaction, Second-order Reactions;

**Enzymatic Reaction:** Definition and Mechanisms, Michaelis-Menten kinetics.

**Module: II****Single Ideal Reactors:** Introduction; Basic division of ideal reactors, Ideal Batch Reactor, Space-time and Space-velocity, Steady-state Mixed Flow Reactor: Design Equation, Graphical Representation of Design Equation, related problem; Steady-state Plug Flow Reactor: Design equation, graphical representation, related problem; Stoichemetric Table,

Elementary idea and design equations for Bioreactor: Mass Balance for Cell, Substrate and Product;

**Design for Single Reactions:** Size and comparison of single reactors: Batch Reactor, PFR, MFR, General Graphical Comparison; Multiple-Reactor Systems: PFRs in Series and/or in Parallel, Equal-size MFRs in Series, MFRs of different sizes in Series, Determining the best size combination of reactor size for a given combination, Reactors of Different Types in Series, Recycle Reactor: Definition of Recycle Ratio, Design Equation, Optimum Recycle ratio.

**Module III:****Design for Multiple Reactions:** Introduction, Reactions in Parallel, Qualitative aspects of Product Distribution, Quantitative Treatment of Product Distribution and of Reactor Size: Definition of Instantaneous and Overall fractional yield, graphical representation; Reactions in Series: Successive First-Order Reactions, Product Distribution, Quantitative

Treatment of PFR, MFR and Batch Reactor.

**Solid-Catalyzed Reaction:** Introduction; Basic idea of catalysis, Catalyst properties, Steps in catalytic reaction: Qualitative discussion on Pore Diffusion, Adsorption, Surface reaction and Desorption, Concept of Rate limiting step; Design of reactors for gas-solid reactions: Design equation and data analysis of heterogeneous system; Quantitative aspects of Pore diffusion controlled reactions (single cylindrical pore, first-order reaction): Material balance for the elementary slice of catalyst pore, Definition of Thiele Modulus and Effectiveness Factor.

**Fluid-Particle Reactions:** Introduction; Different behavior of reacting solid particles; Selection of a Model; Qualitative discussion on Progressive-Conversion Model & Unreacted-Core Model; Comparison of Models with Real Solution.

**Module IV:**

Distribution of Residence Times for Chemical Reactors: General Characteristics; Residence-Time Distribution (RTD) Function; Measurement of the RTD: Pulse Input; Related problems; Characteristics of RTD: Integral Relationships, Mean Residence Time, Different Moments od RTD; RTD in Ideal Reactor: RTD in Batch and PFR, Single CSTR, PFR/CSTR series RTD; Reactor Modeling with the RTD: Introduction, Concept of Macromixing & Micromixing, Zero Parameter Model:

Segregation Model & Maximum Mixedness Model Models for Nonideal Reactors: Introduction; One-Parameter Models: Tanks in Series Model, Dispersion Model: Basic Formulation, Definition of Peclet Number & Vessel Dispersion Coefficient, Boundary Conditions (Closed-Closed & Open- Open), Correction for Sloppy Tracer Input, Relation between Flow, Reaction and Dispersion.

**Text Books / References:**

- Chemical Reaction Engineering – Levenspiel. O.: Wiley Eastern Ltd. 3rd Edn.
- Elements of Chemical Reaction Engineering, Fogler, PHI
- Chemical Engineering Kinetics – Smith J.M. MGH 2nd Edn.
- Principles of Reaction Engineering – S.D. Dawande, Central Techno Publications.