Course Highlights
  • Understand the thermodynamics of Vapor Liquid Equilibria for pure components and mixtures
  • Know, understand and master the concepts necessary to optimize the operation of your distillation column
  • Know about all parameters and profiles for the analysis of your distillation column operation
  • Detect deficiencies in the operation of your distilling column, find their origin and solutions
  • Know and understand the operating variables and process control systems used for your distillation column
  • Know the different types of internals, how they operate and how you can optimize them
  • Use the Aspen Plus simulation results to understand and predict the performance of a distillation column
Curriculum

2 Topics
Introduction
Before you start this course

7 Topics
What is distillation ?
Types of distillation processes
Limits of distillation
Concept of volatility
Distillation practices
Distillation column operation in 3D
Vapor Liquid contact

18 Topics
Introduction
Vapor Liquid Equilibrium
Vaporization of a pure component at constant pressure
Condensation of a pure component at constant pressure
Boiling point
Vaporization and Condensation of a pure component at different pressures
Vapor pressure curve
Vapor pressure curve : The case of water
More on vapor pressure curves
Flash vaporization
Heat of vaporization
Critical point
VLE : What you need to know for pure components
Enthalpy diagram for a pure component 1/3
Enthalpy diagram for a pure component 2/3
Enthalpy diagram for a pure component 3/3
PRACTICE SESSION #1 : Ethylene / Ethane fractionator
PRACTICE SESSION #2 : Reboiler operation

16 Topics
Vaporization of a hydrocarbon mixture at constant pressure
What do we learn ?
Vapor - Liquid Equilibrium of mixtures
Vapor pressure of mxitures
Raoult's law
Dalton's law
Concept of Equilibrium Coefficient
Scheibel and Jenny Chart
Concept of Relative Volatility
Relative volatility : Industrial applications
Relative volatility : Effect of pressure
VLE : What you need to know for mixtures
PRACTICE SESSION #3 : Flash Separator
PRACTICE SESSION #4 : Distillation Column - The vaporization curves
PRACTICE SESSION #5 : Distillation Column Overhead Operation
PRACTICE SESSION #6 : Distillation Column - Cut Point & Separation Line

16 Topics
A typical distillation column
Industrial application : The depropanizer (Steam Cracking Process)
Industrial application : The depropanizer Material Balance
Reflux drum pressure
Pressure profile
Simple pressure control
Complex pressure control
Overhead composition control
Alternative control strategies
Overall thermal balance
Condenser thermal balance
Optimum Reflux Ratio
Flow rate profile
Concentration and temperature profiles - Binary distillation
Concentration profiles - Complex mixtures
Temperature profile - Complex mixtures

13 Topics
Introduction
The shell
The trays
Tray arrangements
Tray types
Packings
Packing support
Liquid distributors
Collector trays
Packing restrainers
Combined Tray / Packed distilling column
The reboiler
The condenser

5 Topics
Learning objectives
The base case
Effect of reflux ratio
Effect of feed stage location
Effect of feed temperature

2 Topics
Downloadable resources
Bonus

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Distillation columns : Principles , Operation & Design

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