case study reaction engineering

Topics: Chemical engineering, Heat exchanger, Heat transfer Pages: 18 (341 words) Published: October 15, 2014
Case study
ChE 515 Reaction Engineering (External)

S2 – 2012

Introduction

Gia Hung Pham

Considerations (Case 1)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.

Process flow diagram
Technical drawing of the reactor
Material selection of the reactor body
Reactor agitator (Mixing in the reactor)
Heat transfer system design
Reactor system control
Estimation of the overall heat transfer coefficient U of the reactor Energy balance on batch reactor
Experimental planning – Reactant analysis
SOP (Safe Operating Procedures)

Considerations (Case 2)

1.
2.
3.
4.
5.
6.
7.
8.
9.

Process flow diagram
Technical drawing of the reactor
Heat transfer system design
Reactor agitator (Mixing in the reactor)
Reactor system control
Estimation of the overall heat transfer coefficient U of the reactor Energy balance on reactor
SOP (Safe Operating Procedure)
Modify initial concentration of A to improve process safety, operation, production rate.

1. Process flow diagram

2. Technical drawing of the reactor
Lit.: Colin H. Simmons and Dennis E. Maguire; Manual of Engineering drawing to British and international standards; second edition; Elsevier – Newnes; 2004.

Examples:

3.Material selection of the reactor body

-

Advantages

-

Disadvantages

-

Availability

-

Cost

Reactor agitator (Mixing in the reactor)

4. Heat transfer system design

-

Internal coil
Double wall reactor
Heating and cooling
External heat exchanger
……

5. Reactor system control
Example

6. Estimation of the overall heat transfer coefficient U of the reactor

-

A. Kayode Coker; Modeling of chemical kinetics and reactor design; 615 – 634; 2nd ed; Gulf Professional Publishing; 2001.
Francis X. McConville; The pilot plant real book; A unique Handbook for the chemical process industry; 4-7; FXM Engineering and Design; 2002.

7. Energy balance
General energy balance on double wall CSTR
T

Ta

Tc
T

_



VR  C p




dT
 Q conv  Q wall  Q chem
dt



Q chem  VR  H R  r


Q wall   AU (T  Tc )




Q conv   V C p T  Ta 

8. Experimental planning – Reactant analysis (case 1)
Kinetics study
Concentration – time curve
Concentration (mole/L)

0

Time (s)

9. SOP (Safe Operating Procedure)

- Start up procedure
- Shut down procedure
- Emergency shut down procedure

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