Lecture 6 Flashcards
1
Q
Phases which can be used in a batch reactor
A
- Gas
- Liquid
- Liquid Solid
- GLS
2
Q
Phases which can be used in a CSTR reactor
A
- Liquid
- Gas-liquid
- Liquid-solid
- GLS
3
Q
Phases which can be used in a PFR reactor
A
- Gas
- Liquid
4
Q
Uses of simple batch reactor
A
- Small scale production
- Intermediate or one shot production
- Fine chemicals or pharmaceuticals
- Fermentation, catalytic reactors
5
Q
Uses of CSTR reactor
A
- When agitation is required
- Series configuration for different concentration streams
6
Q
Uses of PFR reactor
A
- Large scale
- Fast reactions
- Homogeneous reactions
- High temperature
7
Q
Positives of batch reactor
A
- High conversion per unit volume for one pass
- Flexibility - multiple products in one tank
- Easy to clean
- Works, flexible
8
Q
Negative of batch reactor
A
- High operating costs
- Variable product quality
- Manually intensive
- Large cycle time
9
Q
Positives of CSTR reactor
A
- Continuous operation
- Good control
- Law operating costs
- Easy to clean
10
Q
Negatives of CSTR reactor
A
- Low conversion per unit volume
- By passing and channelling if mixing is poor
11
Q
Positives of PFR reactor
A
- High conversion continuous operation
- Good control
- Low operating costs
- Good heat transfer
12
Q
Negatives of PFR reactor
A
- Undesired thermal gradients may exist
- Can block if solids present
- Shut down and cleaning can be expensive
