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Gas Absorption & Stripping in Chemical Engineering
Introduction
Welcome to the Course! (5:41)
Introduction to the Course & Content Index (5:16)
Requirements (4:49)
Recommended Public (3:49)
Reference Material (2:45)
Resources & Downloads
Mass Transfer Review
Mass Transfer Review - An Introduction (2:26)
2.1 Equilibrium (0:29)
What is Equilibrium? (3:36)
Vapor Pressure (4:55)
Partial Pressure (2:38)
Raoult’s Law (5:17)
Gas Solubility in Liquids - Overview (5:25)
Gas Solubility Analysis (2:49)
Henry’s Law (6:48)
2.2 Diffusion & Convection (0:45)
What is Flux? (9:05)
What is Ja? Diffusion Flux (2:42)
What is Molecular Diffusion? (6:48)
Fick's Law (4:56)
Engineering Applications for Diffusion (3:21)
Case A - Equimolar Counter-Difussion (EMD) (6:45)
Exercise#01 - EMD (14:04)
Case B - Unimolecular Diffusion (UMD) (16:27)
Exercise#02 - UMD (6:31)
Convection in Mass Transfer (4:38)
2.3 Interphase Mass Transfer (1:12)
Equilibrium Distribution Curve (6:08)
Film Concept (5:05)
Two-Film Theory (6:08)
Two-Film Theory and Equilibrium Solubility Curve (8:53)
Analysis of Mass Transfer Process using Two-Film Theory (5:46)
Film MT Coefficients (7:50)
Local MTC: kx, ky (3:27)
Mass Transfer Coefficients & Correlations (3:31)
Overall Mass Transfer Coefficients (6:29)
Local vs. Overall (MTC) (3:23)
Mass Transfer Resistance (2:35)
Analysis of Gas Solubility (4:44)
Closure of Mass Transfer Review (0:56)
Gas Absorption
Introduction to Gas Absorption (1:13)
What is Absorption? (8:32)
Nomenclature in Absorption (2:58)
Gas Absorption Examples (9:25)
Physical vs. Chemical Absorption (2:34)
Scope of the Course (3:53)
Desorption & Stripping (3:08)
Stripping Examples (3:38)
Case Study - Amine Gas Treating AKA Sweetening Sour Gas (9:20)
Equipment & Operation (Absorption and Stripping) (4:10)
Type of Equipment - Dispersion of Gas-Liquid and Liquid-Gas (4:12)
Spray Column (2:36)
Bubble Column (2:00)
Packed Column Intro (1:32)
Tray Column Intro (1:25)
Steps for Absorption Column Design (6:27)
Solvent Selection (1:40)
Solvent Selection - Gas Solubility (2:28)
Solvent Selection - Volatility (0:58)
Solvent Selection - Corrosiveness (0:45)
Solvent Selection - Cost (1:09)
Solvent Selection - Viscosity (1:19)
Solvent Selection - Safety (1:00)
Types of Operations (1:39)
Single vs. Multiple Stages (8:28)
Gas Absorption Closure (0:46)
Tray Column - Absorbers
Introduction to Tray Absorbers (4:22)
4.1 Introduction to Tray Columns (0:58)
Introduction to Tray Columns (4:18)
4.2 Equipment used in Tray Columns (1:22)
Sieve Trays (4:08)
Valve Trays (3:57)
Bubble Cap Trays (3:39)
Tray Considerations (0:27)
Trays - Spacing (2:28)
Trays - Sizing (1:12)
Trays - Layouts (4:48)
Trays - Materials (2:50)
Trays - Manways (1:30)
Trays - Operations (1:37)
Tray - Pressure Drop (1:27)
Trays - Costs (1:07)
Tray - Maintenance (0:53)
Trays - Summary (1:04)
All other Pieces (0:27)
Bubbling Area (1:43)
Contact Area (1:24)
Weir (2:34)
Downcomer (3:54)
4.3 Design & Model (0:23)
Counter-current Operation (5:47)
Counter-current Operation for Dilute Systems (5:47)
The Operation Line (4:40)
Exercise#03 - Operation Line (5:54)
The Equilibrium Line (4:09)
Plotting both Lines (6:11)
Min. Solvent Flow Rate (L/G) (12:23)
Exercise#04 - Min. Liquid Flow Rate Calculation (5:51)
Exercise#05: Analytical Calculation of Lmin (13:33)
Other Cases for Absorption in Co-Current, Counter-current, Stripping, etc... (1:22)
Co-Current Operation (1:53)
Counter-Current Gas Stripping (1:39)
4.4 Number of Equilibrium Stages (1:18)
Nomenclature used in Gas Absorption (6:30)
Graphical Method - McCabe Thiele (5:33)
Exercise#06 - Graphical Method (13:48)
The Dilute Absorption Factor "A" (1:25)
Analytical Method - Kremser Equation (3:16)
Exercise#07 - Kremser Equation (4:46)
Exercise#08: Kremser vs. Graphical (3:58)
Dynamic Simulation - Absorption Column (7:26)
Dynamic Simulation - Stripping Column (4:09)
Exercise#09 - Absorption (mass fraction) (9:56)
Stage Efficiency (5:44)
Murphree's Efficiency (3:30)
Examples of real industrial process stage efficiencies (1:44)
Exercise#10: Stage & Murphree Efficiencies (2:53)
Exercise#11: Gas Absorber & Murphree Efficiencies (11:50)
Column Operation (2:51)
Column Operation - Normal (2:04)
Column Operation - Flooding (3:41)
Column Operation - Priming (2:26)
Column Operation - Coning (1:43)
Column Operation - Weeping (1:47)
Column Operation - Dumping (3:37)
Column Operation - Summary (3:34)
Tray Diameter Introduction (6:14)
Tray Spacing Height (2:25)
Exercise#12: Diameter of a Tray Column (13:58)
Pressure Drop in Trays (3:49)
Hd, Dry Liquid sieve loss - Pressure Drop in trays (3:07)
Hl, (equivalent h eight of clear liquid holdup) (3:39)
Hd, Surface Tension Pressure loss (1:17)
Exercise#13: Pressure Drop in a Tray Columns (11:25)
Summary of Exercises 11, 12 and 13 (4:42)
Closure of Trayed Absorbers
Packed Column - Absorbers
Introduction to Packed Columns (2:06)
5.1 Intro to Packed Towers (1:51)
Approach to Design (2:29)
5.2 Equipment in Packed Columns (0:20)
Packed Columns vs. Tray Columns (5:03)
Introduction to Packings (4:05)
Packing Material (2:26)
Random Packing (1:28)
Stacked Packing (1:39)
Structural Packing (0:58)
Other Column Internals (1:51)
Liquid distributor (2:13)
Liquid/Vapour Re-Distributor (1:07)
Vapour Distributor (1:12)
Demister / Mist Eliminator (1:45)
Vortex breaker (0:48)
Packing Supports (1:23)
Retaining devices (Hold-down Plate & Bed limiter ) (1:07)
Column Structure - Top (1:23)
Column Structure - Middle (1:44)
Column Structure - Bottom (10:33)
5.3 Design & Model (2:32)
Introduction to Column Diameters & Pressure Drop (3:51)
Analysis of Drop in Pressure in Packed Towers (7:53)
Flow Parameter vs. Pressure Drop Parameters - Graph (4:07)
Flow Parameter vs. Pressure Drop Parameter - Equation (1:36)
Flooding Pressure Drop Correlation (1:49)
Method 1: Fractional Approach to Flooding Gas Velocity (Absorber Diameter) (4:35)
Method 2: Maximum Pressure Drop Approach (Absorber Diameter) (7:35)
Exercise#14 - Drop in Pressure due to Packings (12:55)
Exercise#15: Pressure drop in a Packed Column (6:58)
Exercise#16: Pressure Drop in an Ethanol Absorber (50mm Hiflow Metallic Rings) (11:48)
HETP (Height Equivalent to a Theoretical Plate) (10:14)
Exercise#17 - HETP (2:03)
Exercise#18 - HETP (4:39)
Method of Transfer Units (4:34)
Number of Transfer Units (NTU) (1:25)
Height of Transfer Unit (HTU) (2:11)
Overall vs. Local Mass Transfer coefficients in MTU (3:00)
Gas Phase - Method of Transfer Units - MTU (4:22)
Liquid Phase - Method of Transfer UnitsMTU (2:13)
Exercise#19 - Mass Transfer Units Method in a Packed Columns (6:14)
Steps - Method of Transfer UnitsMTU (2:31)
Method Comparison - HETP vs MTU (3:48)
Exercise#20: Mass Transfer Units Design (6:45)
Exercise#21 Packed Column Height increase due to increase in purity (4:40)
Exercise#22 Packing Height: Acetone-Air-Water (6:14)
Packed Columns Closure (2:32)
Advanced Systems
Introduction to Advanced Systems of Absorption (2:39)
Non-diluted Cases in Tray Columns (7:46)
Exercise#23 Concentrated Tray Column Absorber (11:04)
Packed Columns in Non-diluted Cases (1:35)
Exercise#24 Concentrated Case - Packed Column (11:20)
6.2 Multicomponenet Absorption (5:20)
Methodology for Multicomponent Absorption (6:16)
Case Study - Multicomponent Absorption (15:22)
Sum-Rates (SR) Method for Absorption and Stripping (9:38)
6.3 Reactive Absorption (4:06)
Advanced System Closure (1:07)
Software Simulation
Introduction to Software Simulation of Absorption Systems (1:35)
Aspen Plus - Introduction (2:18)
Models of Absorption in Aspen Plus (3:53)
Case Study 1 - Problem Statement (3:08)
Case Study 1 - Simulation & Results (14:59)
EXTRA - Case Study 1 - Tray Sizing Effects (3:04)
EXTRA - Case Study 1 - Trays vs. Packings (4:18)
EXTRA - Case Study 1 - Diluted vs. Concentrated Case (5:18)
Aspen HYSYS - Introduction (1:46)
Models of Absorption Columns in Aspen HYSYS (3:04)
Case Study 2 - Problem Statement (7:54)
Case Study 2 - Simulations & Results (2:39)
EXTRA - Case Study 2 - Multicomponent Absorption (3:13)
Closure of Absorption Simulation with Software (1:08)
Conclusion
Course Wrap-up (1:39)
Final Conclusion (1:26)
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4.4 Number of Equilibrium Stages
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