Fenske equation

Fenske equation

The Fenske equation in continuous fractional distillation is an equation used for calculating the minimum number of theoretical plates required for the separation of a binary feed stream by a fractionation column that is being operated at total reflux (i.e., which means that no overhead product distillate is being withdrawn from the column).

The equation was derived by Merrell Fenske in 1932 [Fenske, M.R. (1932). "Ind.Eng. Chem.", Vol. 24: 482.] , a professor who served as the head of the chemical engineering department at the Pennsylvania State University from 1959 to 1969.

This is one of the many different but equivalent versions of the Fenske equation: [http://www.eng.fsu.edu/~schreiber/uol/exp300/ Distillation notes] (Loren Schreiber, Florida State University)] [http://www.chemeng.queensu.ca/courses/CHEE317/documents/Lecture_13_2007.pdf Lecture 13: Fenske Equation] (Queens University, Canada)] [ [http://www.chemeng.ed.ac.uk/~jskillin/teaching/sepprocs/2004-05/tutorials/Tut6.pdf Tutorial 6: Separation Processes] (J. Skilling, University of Edinburgh, Scotland)] [cite book|author=Maxwell, J.B.|title=Data Book on Hydrocarbons|edition=1st Edition|publisher=D. Van Nostrand|year=1950|id=]

: N = frac{log , igg [ Big(frac{X_d}{1-X_d}Big)Big(frac{1-X_b}{X_b} Big) igg] }{log , alpha_{avg

ee also

*Continuous distillation
*Distillation
*Fractional distillation
*Fractionating column
*McCabe-Thiele method

References

External links

* [http://www.cbu.edu/~rprice/lectures/distill4.html Lecture Notes] (R.M. Price, Christian Brothers University, Tennessee)
* [http://www.design.che.vt.edu/publication/74_LiuQuantrilleCheng1993df.pdf "Studies in Chemical Process Design and Synthesis"] , Y. A. Liu, T.E. Quantrille, and S. Chengt, Ind. Eng. Chem. Res., Volume 29, 1990
* [http://www.engr.sjsu.edu/jennimi/Classes/CHE160B/Notes/25%20-%20MULTICOMPONENT%20DISTILLATION%20CONCEPTS%20BW.pdf Multi-component Distillation] (M.B. Jennings, San Jose State University)


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