Separation Processes: Absorption and Stripping Techniques

This lecture covers absorption-based separation processes, focusing on mass transfer principles in absorption and stripping. The instructor explains the intended learning outcomes, including understanding mass transfer, applying graphical methods, and using the Kremser equation for stage calculations. The lecture discusses the role of mass separating agents (MSA) in creating phase separation, with examples such as post-combustion capture and natural gas processing. The instructor highlights the differences between absorption and other separation processes like liquid-liquid extraction and distillation. Key concepts include the equilibrium-stage nature of absorption, the choice of solvents based on concentration, and the degree of freedom in absorption systems. The lecture also introduces Henry's law and its implications for gas solubility in liquids. The instructor emphasizes the importance of understanding the operating line and equilibrium relationships in designing absorption systems. The session concludes with practical examples and exercises to reinforce the concepts discussed, ensuring students grasp the complexities of absorption and stripping processes in chemical engineering.