1. Process Equipment Design Distillation Columns

2. Fractional Distillation
Distillation is the most common form of separation technology used in:
petroleum refineries
petrochemical and chemical plants
natural gas processing
cryogenic air separation plants

3. Tower Heuristics

4. Tower Heuristics

5. Tray Tower Heuristics

6. Packed Tower Heuristics

7. Liquid-Liquid Extraction

8. Liquid-Liquid Extraction

9. Aspen Plus RadFrac Block
RadFrac is a rigorous model for simulating all types of multistage vapor-liquid fractionation operations. These operations include:
Ordinary distillation
Absorption and Reboiled Absorption
Stripping and Reboiled Stripping
Extractive and Azeotropic Distillation
See Corresponding Document on Column Design and Sizing

10. Aspen Plus RadFrac Block
RadFrac is suitable for:
Two-phase systems
Three-phase systems
Narrow and wide-boiling systems
Systems exhibiting strong liquid phase nonideality
RadFrac can model columns in which chemical reactions are occurring. Reactions can have:
Fixed conversions
Equilibrium
Rate-controlled
Electrolytic

11. Aspen Plus DSTWU Block
DSTWU performs shortcut design calculations for single-feed, two-product distillation columns with a partial or total condenser.
DSTWU assumes constant molal overflow and constant relative volatilities
DSTWU uses this method/correlation
To estimate
Winn
Minimum number of stages
Underwood
Minimum reflux ratio
Gilliland
Required reflux ratio for a specified number of stages or the required number of stages for a specified reflux ratio

12. Aspen Plus Distil Block
Distl performs shortcut distillation rating calculations for a single-feed, two-product distillation column.
The column can have either a partial or total condenser.
Distl calculates product composition using the Edmister approach.
Distl assumes constant mole overflow and constant relative volatilities.