CBE 30356 - Lecture Notes - March 30, 2023
Announcements
Class notes
Read through pages 264-277 of the notes and view the online narration below. Don't forget to complete the quiz in Canvas!
The main points of the lecture were
- Diffusion with reaction in liquids
- Hole transfer in Sb2S3 solar cells
Goals:
After this class you should be able to:
- Know what the Hatta number is.
- Understand how a first order consumption reaction affects both steady-state and transient diffusion problems.
- Figure out how to extract diffusivities and mass transfer coefficients from transient concentration measurements.
Reading
Problem of the Day:
In this problem we examine the related problem of gas absorption from a sparger: the idea is that you release bubbles of gas with total surface area A into a well-mixed volume V. The gas dissolves into the liquid and reacts away, with the mass transfer limitation being approximated by diffusion through a thin film at the surface of the bubble. The notes for this problem are provided here.
Demonstration:
David.T.Leighton.1@nd.edu