Distillation Lines versus Residue Curves for a Mixture of Oxygen, Argon, and Nitrogen at 1 atm

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Consider a ternary mixture composed of nitrogen, oxygen, and argon. This Demonstration compares the residue curve (dashed red) and the distillation line (dot-dashed blue). These two curves correspond to the composition profiles in packed (residue curves) and staged columns (distillation lines) at infinite reflux. You can drag the locator to change the position of the curves. This is a cryogenic process, with the temperatures in the diagram varying between 77.4 K and 90.3 K, the boiling temperatures of nitrogen and oxygen, respectively.

Contributed by: Housam Binous (March 2011)
Open content licensed under CC BY-NC-SA


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For more information, see

M. F. Doherty and M. F. Malone, Conceptual Design of Distillation Systems, New York: McGraw-Hill, 2001.



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