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Gas Absorption & Stripping in Chemical Engineering

Model Separation Processes involving Absorption such as Packed Towers and Tray Columns
Instructor:
Chemical Engineering Guy
788 students enrolled
English [Auto-generated]
Understand the principle behind gas Absorption and Stripping
Design & Operate Packed Towers
Design & Operate Tray Columns
Calculate the required values for a given Separation Process using Absorption/Stripping
Solve analytically via Kremser Brown Souders Equation
Understand the concept of "operation line" and "equilibrium line"
Calculate the total required stages via Graphical Method
Learn about Absorption Column Equipment (Trays, Packings, Column Internals)
Calculate & Understand the minimum L/G ratio
The HETP method for Packings
The MTU, Method of Transfer Units for Packed Towers
Model Co-Current and Counter-Current Operations
Solve relevant problems involving Gas Absorption and Stripping

Introduction:

Gas Absorption is one of the very first Mass Transfer Unit Operations studied in early process engineering. It is very important in several Separation Processes, as it is used extensively in the Chemical industry.

Understanding the concept behind Gas-Gas and Gas-Liquid mass transfer interaction will allow you to understand and model Absorbers, Strippers, Scrubbers, Washers, Bubblers, etc…

We will cover:

  • REVIEW: Of Mass Transfer Basics required

  • GAS-LIQUID interaction in the molecular level, the two-film theory

  • ABSORPTION Theory

  • Application of Absorption in the Industry

  • Counter-current & Co-current Operation

  • Several equipment to carry Gas-Liquid Operations

  • Bubble, Spray, Packed and Tray Column equipments

  • Solvent Selection

  • Design & Operation of Packed Towers

  • Pressure drop due to packings

  • Design & Operation of Tray Columns

  • Single Component Absorption

  • Single Component Stripping/Desorption

  • Diluted and Concentrated Absorption

  • Basics: Multicomponent Absorption

  • Software Simulation for Absorption/Stripping Operations (ASPEN PLUS/HYSYS)

Solved-Problem Approach:

All theory is backed with exercises, solved problems, and proposed problems for homework/individual study.

At the end of the course:

You will be able to understand mass transfer mechanism and processes behind Absorption and Stripping. You will be able to continue with a Distillation Theory and more Mass Transfer Unit Operation Course and/or Separation Processes Course.

About your instructor:

I majored in Chemical Engineering with a minor in Industrial Engineering back in 2012.

I worked as a Process Design/Operation Engineer in INEOS Koln, mostly on the petrochemical area relating to naphtha treating. There I designed and modeled several processes relating separation of isopentane/pentane mixtures, catalytic reactors and separation processes such as distillation columns, flash separation devices and transportation of tank-trucks of product.

Introduction

1
Welcome to the Course!
2
Introduction
3
Requirements
4
Recommended Public
5
Reference Material

https://www.chemicalengineeringguy.com/courses/gas-absorption-stripping/gas-absorption-database-91919/

Mass Transfer Review

1
Section 2 - Introduction
2
2.1 Equilibrium
3
What is Equilibrium?
4
Vapor Pressure
5
Partial Pressure
6
Raoult’s Law
7
Gas Solubility in Liquids - Overview
8
Gas Solubility Analysis
9
Henry’s Law
10
2.2 Diffusion & Convection
11
What is Flux?
12
What is Ja? Diffusion Flux
13
What is Diffusion?
14
Fick's Law
15
Engineering Applications for Diffusion
16
Case A - Equimolar Counter-Difussion (EMD)
17
Exercise#01 - EMD
18
Case B - Unimolecular Diffusion (UMD)
19
Exercise#02 - UMD
20
Convection
21
2.3 Interphase Mass Transfer
22
Equilibrium Distribution Curve
23
Film Concept
24
Two-Film Theory
25
Two-Film Theory and Equilibrium Solubility Curve
26
Analysis of Mass Transfer Process using Two-Film Theory
27
Film MT Coefficients
28
Local MTC: kx, ky
29
Mass Transfer Coefficients & Correlations
30
Overall Mass Transfer Coefficients
31
Local vs. Overall (MTC)
32
Mass Transfer Resistance
33
Analysis of Gas Solubility
34
Section 2 - Closure

Gas Absorption

1
Introduction to Gas Absorption
2
What is Absorption?
3
Nomenclature in Absorption
4
Gas Absorption Examples
5
Physical vs. Chemical Absorption
6
Scope of the Course
7
Desorption & Stripping
8
Stripping Examples
9
Case Study - Amine Gas Treating AKA Sweetening Sour Gas
10
Equipment & Operation (Absorption and Stripping)
11
Type of Equipment - Dispersion of Gas-Liquid and Liquid-Gas
12
Spray Column
13
Bubble Column
14
Packed Column Intro
15
Tray Column Intro
16
Design Steps
17
Solvent Selection
18
Solvent Selection - Gas Solubility
19
Solvent Selection - Volatility
20
Solvent Selection - Corrosiveness
21
Solvent Selection - Cost
22
Solvent Selection - Viscosity
23
Solvent Selection - Safety
24
Types of Operations
25
Single vs. Multiple Stages
26
Gas Absorption Closure

Tray Column - Absorbers

1
Section 4 - Introduction
2
4.1 Introduction to Tray Columns
3
Introduction to Tray Columns
4
4.2 Equipment used in Tray Columns
5
Sieve Trays
6
Valve Trays
7
Bubble Cap Trays
8
Tray Considerations
9
Trays - Spacing
10
Trays - Sizing
11
Trays - Layouts
12
Trays - Materials
13
Trays - Manways
14
Trays - Operations
15
Tray - Pressure Drop
16
Trays - Costs
17
Tray - Maintenance
18
Trays - Summary
19
All other Pieces
20
Bubbling Area
21
Contact Area
22
Weir
23
Downcomer
24
4.3 Design & Model
25
Counter-current Operation
26
Counter-current Operation for Dilute Systems
27
Operation Line
28
Exercise#03 - Operation Line
29
Equilibrium Line
30
Plotting both Lines
31
Min. Solvent Flow Rate
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