1. Terry A. Ring Chemical Engineering University of Utah
AIChE Project Week 2
Terry A. Ring
Chemical Engineering
University of Utah

2. Questions How do we enter the rate data? Go to Aspen Help!
Type Kinetics
LHHW Kinetics
Kinetic Factor is forward Rate Constant
Backward Rate constant is
Kinetic Factor*K2
K2 is the Reaction Equilibrium Constant

3. Concentration Various Options Equilibrium Constants
Keq=Aeq exp(ΔGeq/RT)
To convert
Ln(Keq) = ln(Aeq) + ΔGeq/RT
In general
ΔGeq= ΔH – TΔS
ΔH = ΔHo + Δ𝐶𝑝 𝑑𝑇
ΔCp=Rg*(Δa+ ΔbT+ ΔcT2+ Δd/T2)

4. Questions How To Deal With Impurities
1) How much impurity will Reactor Generate
Reactors
RGibbs to see if a Species will be formed under reaction Conditions
2) How will impurity effect Separation
Separation Train
Add a small amount of impurity
Determine where the impurity ends up in the separation train

5. Various Reactors, Various Reactions

6. Optimum Inlet Temperature Exothermic Rxn
CSTR
PFR

7. Impurities in Separation Trains
It is important to know where the impurites will accumulate in the train
Which products will be polluted by which impurities
Is that acceptable for sale of product?
Probably not!

8. Separation Systems
Discuss PCl3 recycle back and fourth between Separation and HPC

9. What is the Heuristic for ________?
Please see L5-Heuristics for Process Design
Please see Sieder, et. al. Chapter 6
They are all in Chapter 6 and all in L5