CBE 417
Download
1 / 27

CBE 417 “Unit Operations” - PowerPoint PPT Presentation


  • 166 Views
  • Uploaded on

CBE 417 “Unit Operations”. Instructor: David J. Dixon Chemical and Biological Engineering Department South Dakota School of Mines and Technology. Fall 2012. Overview. Introduction UO course overview Equilibrium Stage separations What are “Unit Operations”. Overview. Introduction

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 ' CBE 417 “Unit Operations”' - hoshi


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

CBE 417

“Unit Operations”

Instructor: David J. Dixon

Chemical and Biological Engineering Department

South Dakota School of Mines and Technology

Fall 2012


Overview

  • Introduction

  • UO course overview

  • Equilibrium Stage separations

  • What are “Unit Operations”


Overview

  • Introduction

    • Fulbright experience

    • ACHEMA June 2012


Overview

  • Introduction

  • UO course overview

  • Equilibrium Stage separations

  • What are “Unit Operations”



Course Overview

http://webpages.sdsmt.edu/~ddixon/


Overview

  • Introduction

  • UO course overview

  • Equilibrium Stage separations

  • What are “Unit Operations”

Why are separations important in an industrial facility?

Feedstocks are generally mixtures that are not particularly useful…so industrial facility (plant) is used to “add value” to the raw materials:

Example: (average USA prices on 28 Aug 2012)

Crude oil ~$96/bbl (0.60 $/liter; 0.48 euro/liter)

gasoline ~$3.78/gal (1.00 $/liter; 0.80 euro/liter)

Example: (average USA prices on 5 April 2010)

Crude oil ~$86/bbl (0.54 $/liter; 0.40 euro/liter)

gasoline ~$3.25/gal (0.86 $/liter; 0.64 euro/liter)


Typical Refinery Products

  • Seader & Henley (2006)


Industrial Chemical Facility

Typical chemical facility might have 40 – 90% of costs invested in separations.


Recovery/Purification Cost vs Concentration

  • Seader & Henley (2006)


Equilibrium Stage Separations

We could also consider some examples that are non-equilibrium systems; such as membrane and adsorption processes.


Technological Maturity

  • Seader & Henley (2006)


Separations as Unit Operations

Figure 1.15 and Table 1.13

  • Seader & Henley (2006; 2011)


Unit Operation

What is a “Unit Operation”?

  • while the chemicals being separated might be different, the specific technique used has generally the same design methods

    • i.e. a distillation column separating ethanol from water is designed in the same general manner as a distillation column separating toluene from xylene.

    • Examples of techniques generally called unit operations include:

      • Distillation

      • Absorption

      • Liquid-liquid extraction

      • Heat exchanger

      • Etc…


Choosing a Unit Operation

How does one choose a UO? i.e. ethanol from water separation

  • Distillation

  • Adsorption

  • Crystallization

  • L-L extraction

  • Pervaporation

  • Absorption

  • Seader & Henley (2006)


Separations as Unit Operations

  • Seader & Henley (2006)








Today’s Process Engineering

  • Today, most of major unit operations are built into a process simulator and used extensively within the industry. For example:

  • Simulators: AspenPlus, Fluent, Comsol, ChemSep, others.


Overview

  • Introduction

  • UO course overview

  • Equilibrium Stage separations

  • What are “Unit Operations”



ad