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ChE 363- Separation Processes and Mass Transfer

Recitation:All are recommended. Aspen software sessions are mandatory

Text: McCabe, Smith and Harriott "Unit Operations of Chemical Engineering" Sixth orSeventh edition (The difference between these two editions is very small).

Related references in chemistry library:Seader, J.D., Henley, "Separation Process Principles" (very extensive)Cussler "Diffusion: Mass Transfer in Fluid Systems " ( non-required suppl. text).Hines and Maddox "Mass Transfer"

Prof: Keith Johnston, Office Hours:

TA: Bobby Stover CPE 5.432 Office Hours:

Prerequisites: ChE 322, 348, 353

Material (McCabe et al. (6th

or 7th

edition required- very similar editions)17 Diffusion and Mass Transfer between Phases (steady and unsteady state) (also

Cussler)20 Equilibrium stage operations18 Gas Absorption (excluding rich gases and chemical reaction)21 Distillation22 Multicomponent distillation

23 Extraction including Bioseparations (we will not cover leaching)25 Fixed-bed separations: Adsorption, chromatography, ion exchange, materials

chemsitry26 Membrane separations with applications, e.g. fuel cells27 Crystallization/Nucleation/Nanotechnology

Grading method: 3 Hourly exams (300), Final (200), HW (50). Total points: 550

Abilities before enteringUnderstand vapor-liquid equilibrium and liquid-liquid eq. incl. ternary phase diagramsMass and energy balances, Fick's laws

Use of spread sheets which will be used to understand solutions of stage wise problemsAbilities students should gainEngineering design for open ended problems: How to synthesize material balances,

thermodynamics and mass transfer to do stagewise calculations- requiresengineering assumptions

Solution of stage wise mass transfer and equilibrium problemsspreadsheets- to learn concepts of McCabe-Thiele graphical solutionsprocess simulator (e.g. Aspen)

Thermodynamic calculations in distillation and stage efficienciesUnderstand key components and concentration profiles in multicomponent distillationMass transfer coefficients, correlations and film theory (absorption, adsorption etc.)

Partial differential equations: mass transfer and adsorptionMolecular concepts and materials chemistry for achieving selectivity in separationsNucleation, growth and crystallization (very important in nanotechnology)Consideration of safety, energy utilization, sustainable technologies, pollution, emerging

technologies and the role of government policy and societyApplication to broad range of industries: energy, petrochemicals, environmental,

nanotechnology, biotechnology, pharmaceuticals-drug delivery, transportation(fuel cells)

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Tips to maximize success:1. It is an honor to have you in our department and in my class as you have already

excelled. Continue to develop a passion for knowledge and life-long learning.2. Class etiquette and professionalism- other students and I will be grateful for this:

a. Pls only use laptops/tablets if it is for this class. Pls do not have cellphones in view or text. Often students next to you and I get distracted.

b. Pls try to avoid leaving room, coming back etc unless very important.Nearly everyone will lose focus and watch you leave and come back.

c. Pls strive to excel in unitasking and deep learning and focus. Classroom isnot a multitasking environment.

3. Review info where you first learned it. Reread key sections in calculus book,transport book. The more you review the better you will retain it.

4. See us in office hours. Participate in lecture and recitation. Students often chatwith me right after class as well.

5. Find other students that study together in the building if you can.6. It may take~ 8 hours/week outside of class to read the book including examples in

chapters (in conjunction with notes), learn the theory and concepts, and to do thehomework problems.

7. Strive to understand the theory and concepts needed to solve the problems ratherthan just finding an equation to solve a specific problem. Study all examples inthe book chapters.

8. Learn to identify classes of problems based on theoretical concepts. Takes lots ofpractice. Lots of time. The summary sheet will help with this.

9. Maximize what you get out of the lectures by keeping up and understanding allconcepts after each lecture. If you get behind, try to immediately catch up to max.efficiency for learning.

10.Look ahead in the book for about 5-10 min before each lecture. The brain willthen activated and eager to learn very efficiently and deeply. RGB and KPJ bothused this as undergrads and it worked well for us.

11.Avoid the short cut to use old homework solutions as a crutch. It is far easier tofollow somebody elses solution than to construct your own. No pain, no gain.

12.Students should do all homework problems and study solutions after turning inhomework as needed on blackboard under course documents. Save hws when youget them back so you can study your approach vs. posted solutions.

13.Always check units in eqns. They are important. Check with factor label. Thisapproach helps with exam grades.