Absorption is a mass-transfer process in chemistry in which a vapor solute A in a gas mixture is absorbed by means of a liquid in which the solute is more or less soluble. The gas mixture consists mainly of an inert gas and the solute.
The liquid also is primarily immiscible in the gas phase; that is, its vaporization into the gas phase is relatively slight. Subsequently, the solute is recovered from the solution by distillation. In the reverse process of desorption or stripping, the same principles and equations hold.
During the course:
- An overview of different gas fluid (liquid) separation and gas absorption mechanism is offered;
- A divers series of distillation types and gas absorption types is treated;
- Optimalization of separation and distillation and gas absorption types is allocated;
- The newest developments on distillation / separator and gas absorption design and application will be dealt with.
Goal
To develop a fundamental understanding of gas fluid separation and gas absorption engineering.
This goal will be achieved by solving gas fluid (liquid) separation and gas absorption engineering problems trough reasoning.
After the course:
- You understand the influence of a good distillation process design on the products and the separation;
- You know what the important factors are that influence the process;
- You have an over view of available types of separation processes;
- You can optimize existing processes.
Learning Objectives Absorption
On completion of this course, a student should be able to:
- Calculate the degrees of freedom for a system in equilibrium
- Calculate flows and composition in single and multiple equilibrium contact stages by using both an equilibrium relationship and a material balance
- Use analytical and graphical techniques to calculate the number of stages needed for either an absorber or stripper
- Calculate rates of mass transfer across fluid–fluid interfaces using two-film-theory
- Estimate tray efficiency from correlations of mass-transfer coefficients using two-film-theory
- State the differences between loading point and flooding point in a packed column
- Estimate the pressure drop across a trayed and packed column
- Estimate column diameter
- Compare the three different types of trays based on efficiency and design
- Calculate, for a packed column, the height equivalent to a theoretical plate/stage; then, explain its difference from the height of a transfer unit
- Calculate, for a packed column, the number of theoretical plates/stages; then, explain its difference from the number of transfer units
Learning Objectives Distillation
On completion of this course, a student should be able to:
- Plot an x, y diagram using Raoult’s law
- Distinguish between a minimum and a maximum boiling azeotrope
- Describe the three common types of column internals used in a distillation tower
- Describe the concept of constant molal overflow
- Describe the differences between batch and fractional distillation
- Use the McCabe–Thiele method to solve a variety of binary distillation problems
- Describe and calculate the three types of tray efficiencies discussed in the chapter
- Calculate column diameter and heights
- Use shortcut methods for multicomponent distillation to calculate number of stages and optimal feed stage