“Chemical Engineering Equilibrium Separations”
Download
1 / 16

- PowerPoint PPT Presentation


  • 82 Views
  • Uploaded on

“Chemical Engineering Equilibrium Separations” Lectures 12 & 13. 12 Oct 2012. Overview. AspenPlus : Shortcut methods: DSTWU Rigorous method: RADFRAC Efficiencies Introduction to multicomponent distillation. AspenPlus : DSTWU. Tray Operation. Spray Froth * Emulsion Bubble

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about '' - kina


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Chemical engineering equilibrium separations lectures 12 13

Overview

  • AspenPlus:

    • Shortcut methods: DSTWU

    • Rigorous method: RADFRAC

  • Efficiencies

  • Introduction to multicomponent distillation


Chemical engineering equilibrium separations lectures 12 13

AspenPlus: DSTWU


Chemical engineering equilibrium separations lectures 12 13

Tray Operation

Spray

Froth *

Emulsion

Bubble

Cellular foam


Chemical engineering equilibrium separations lectures 12 13

Types of Trays

Sieve

Valve

Bubble cap



Chemical engineering equilibrium separations lectures 12 13

Operation

Typically columns operated at 50% - 85% of flooding.

Figure 6.21 Limits of stable operation in a trayed tower. [Reproduced by permission from H.Z. Kister, Distillation Design, McGraw-Hill, New York (1992).]

Seader et.al., 2012


Chemical engineering equilibrium separations lectures 12 13

Operation

Video:

FRI (Fractionation Research, Inc.) non-profit research consortium

“Design and Performance of Fractionating Devices”

http://www.fri.org/


Chemical engineering equilibrium separations lectures 12 13

Operation

Typically columns operated at 50% - 85% of flooding.

Figure 6.21 Limits of stable operation in a trayed tower. [Reproduced by permission from H.Z. Kister, Distillation Design, McGraw-Hill, New York (1992).]

Seader et.al., 2012


Chemical engineering equilibrium separations lectures 12 13

Efficiencies

Assumed equilibrium stages, but may not reach equilibrium on a stage; why?

Flooding!


Chemical engineering equilibrium separations lectures 12 13

Efficiencies

Overall column efficiency:

Murphree efficiency:



Chemical engineering equilibrium separations lectures 12 13

Efficiencies

Seader & Henley, 2006


Chemical engineering equilibrium separations lectures 12 13

Efficiencies

P.C. Wankat, 2nd., 2007


Chemical engineering equilibrium separations lectures 12 13

Overview

  • Questions on homework??

  • McCabe-Thiele graphical technique (binary systems)

    • Condensers

    • Reboilers

  • Binary Shortcut Methods

  • AspenPlus:

    • Shortcut methods: DSTWU

    • Rigorous method: RADFRAC

  • Efficiencies

  • Introduction to multicomponent distillation (chapter 9)