CHE 348 Fall 2010 Course Syllabus Instructor: Dr. Enrico N. Martinez 3053B Forney Hall, 49-66998, marti309@purdue.edu Office Hours: Tu, Th 2:30-3:30 or call for appointment TA: Danni Gao, gaod@purdue.edu 2016 Forney Hall Office hours: Tu, 1:00-2:45 Textbook: Roberts, G. W., “Chemical Reactions and Chemical Reactors”, John Wiley, 2009.

Syllabus Cont… There will be two midterm exams during the semester (1st on October 6, 2nd on November 17), 50 minutes long during class time. There will be one final examination, 2 hours long on the programmed date. There will be 4 laboratory sessions throughout the semester (September 14, October 5, November 2 and November 23) The final grade will be calculated taking into account Homework grades, Lab performance and Report, midterm exams and final exam grade.

Chem Eng 348/Fall 2010 Course Contents 1. Reactions and Reaction Rates (Chapt. 1) 2. Reaction Rates, temperature and concentration dependencies, heat of reaction, thermodynamic equilibrium (Chapt. 2) 3. Ideal Reactors, Batch, Tubular Plug Flow and continuous Stirred Tanks (Chapt. 3) 4. Sizing and Analysis of Ideal Reactors 5. Reaction Rate Fundamentals , Chemical Kinetics (Chapt. 5) 6. Analysis of Experimental Kinetic Data (Chapt. 6) 7. Multiple Reactions (Chapt. 7) 8. Use of the Energy Balance in reactor Sizing and Analysis (Chapt. 8) 9. Heterogeneous Catalysis (Chapt. 9) 10. Non Ideal Reactors (Chapt. 10, if time permits)

Chemical Reaction Engineering Chemical reaction engineering is at the heart of virtually every chemical process. It separates the chemical engineer from other engineers. Industries that Draw Heavily on Chemical Reaction Engineering (CRE) are: CPI (Chemical Process Industries) Dow, DuPont, Exxon-Mobil, Chevron-Phillips

Chemical Identity A chemical species is said to have reacted when it has lost its chemical identity.

Chemical Identity A chemical species is said to have reacted when it has lost its chemical identity. The identity of a chemical species is determined by the kind, number, and configuration of that species’ atoms.

Chemical Identity A chemical species is said to have reacted when it has lost its chemical identity. 1. Decomposition

Chemical Identity A chemical species is said to have reacted when it has lost its chemical identity. 1. Decomposition 2. Combination

Chemical Identity A chemical species is said to have reacted when it has lost its chemical identity. 1. Decomposition 2. Combination 3. Isomerization

Reaction Rate The reaction rate is the rate at which a species looses its chemical identity per unit volume.

Reaction Rate The reaction rate is the rate at which a species looses its chemical identity per unit volume. The rate of a reaction (mol/dm3/s) can be expressed as either the rate of Disappearance: -rA or as the rate of Formation (Generation): rA

Reaction Rate Consider the isomerization AB rA = the rate of formation of species A per unit volume -rA = the rate of a disappearance of species A per unit volume rB = the rate of formation of species B per unit volume

Reaction Rate EXAMPLE: AB If Species B is being formed at a rate of 0.2 moles per decimeter cubed per second, ie, rB = 0.2 mole/dm3/s

Reaction Rate EXAMPLE: AB rB = 0.2 mole/dm3/s Then A is disappearing at the same rate: -rA= 0.2 mole/dm3/s

Reaction Rate EXAMPLE: AB rB = 0.2 mole/dm3/s Then A is disappearing at the same rate: -rA= 0.2 mole/dm3/s The rate of formation (generation of A) is rA= -0.2 mole/dm3/s

NOTE: dCA/dt is not the rate of reaction Reaction Rate For a catalytic reaction, we refer to -rA', which is the rate of disappearance of species A on a per mass of catalyst basis. (mol/gcat/s) NOTE: dCA/dt is not the rate of reaction

Reaction Rate Consider species j: rj is the rate of formation of species j per unit volume [e.g. mol/dm3/s]

Reaction Rate rj is the rate of formation of species j per unit volume [e.g. mol/dm3*s] rj is a function of concentration, temperature, pressure (if there is a gas phase), and the type of catalyst (if any)

Reaction Rate rj is the rate of formation of species j per unit volume [e.g. mol/dm3/s] rj is a function of concentration, temperature, pressure, and the type of catalyst (if any) rj is independent of the type of reaction system (batch reactor, plug flow reactor, etc.)

Reaction Rate rj is the rate of formation of species j per unit volume [e.g. mol/dm3/s] rj is a function of concentration, temperature, pressure (if there is a gas phase), and the type of catalyst (if any) rj is independent of the type of reaction system (batch, plug flow, etc.) rj is an algebraic equation, not a differential equation

General Mole Balance

General Mole Balance

Batch Reactor Mole Balance

CSTR Mole Balance

Plug Flow Reactor

Plug Flow Reactor Mole Balance PFR: The integral form is: This is the volume necessary to reduce the entering molar flow rate (mol/s) from FA0 to the exit molar flow rate of FA.

Packed Bed Reactor Mole Balance PBR The integral form to find the catalyst weight is:

Reactor Mole Balance Summary Individual Assignment: Problem P1-15 p. 33 Textbook Deliver the answer in paper on Monday Aug. 31st in class

Fischer-Tropsch Reaction in a “Riser Reactor”

Chemical Reaction Engineering Chemical reaction engineering is at the heart of virtually every chemical process. It separates the chemical engineer from other engineers. Industries that Draw Heavily on Chemical Reaction Engineering (CRE) are: CPI (Chemical Process Industries) Dow, DuPont, Amoco, Chevron Pharmaceutical – Antivenom, Drug Delivery Medicine –Pharmacokinetics, Drinking and Driving Microelectronics – CVD

Reaction Rate rA = the rate of formation of species A per unit volume Consider the isomerization AB rA = the rate of formation of species A per unit volume

Reaction Rate Consider the isomerization AB rA = the rate of formation of species A per unit volume -rA = the rate of a disappearance of species A per unit volume

Reactor Mole Balance Summary