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
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Instructor: David J. Dixon
Chemical and Biological Engineering Department
South Dakota School of Mines and Technology
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 chemical facility might have 40 – 90% of costs invested in separations.
We could also consider some examples that are non-equilibrium systems; such as membrane and adsorption processes.
Figure 1.15 and Table 1.13
What is a “Unit Operation”?
How does one choose a UO? i.e. ethanol from water separation