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column that is being operated at total reflux (i.e., which means that no overhead product distillate is being withdrawn from the column).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)


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Distillation — Distiller and Distillery redirect here. For other uses, see Distiller (disambiguation) and Distillery (disambiguation). For other uses, see Distillation (disambiguation). Laboratory display of distillation: 1: A heating device 2: Still pot 3:… …   Wikipedia

  • Logarithm — The graph of the logarithm to base 2 crosses the x axis (horizontal axis) at 1 and passes through the points with coordinates (2, 1), (4, 2), and (8, 3) …   Wikipedia

  • Continuous distillation — Image 1: Typical industrial distillation towers Image 2: A crude oil vacuum distillation column as used in oil refineries …   Wikipedia

  • Vapor-liquid equilibrium — Vapor liquid equilibrium, abbreviated as VLE by some, is a condition where a liquid and its vapor (gas phase) are in equilibrium with each other, a condition or state where the rate of evaporation (liquid changing to vapor) equals the rate of… …   Wikipedia

  • Theoretical plate — A theoretical plate in many separation processes is a hypothetical zone or stage in which two phases, such as the liquid and vapor phases of a substance, establish an equilibrium with each other. Such equilibrium stages may also be referred to as …   Wikipedia

  • Dalton's law — For the law of stoichiometry, see Law of multiple proportions. In chemistry and physics, Dalton s law (also called Dalton s law of partial pressures) states that the total pressure exerted by a gaseous mixture is equal to the sum of the partial… …   Wikipedia

  • Fractional distillation — is the separation of a mixture into its component parts, or fractions, such as in separating chemical compounds by their boiling point by heating them to a temperature at which several fractions of the compound will evaporate. It is a special… …   Wikipedia

  • Fractionating column — A fractionating column or fractionation column is an essential item used in the distillation of liquid mixtures so as to separate the mixture into its component parts, or fractions, based on the differences in their volatilities. Fractionating… …   Wikipedia

  • Dry distillation — is the heating of solid materials to produce gaseous products (which may condense into liquids or solids). The method may or may not involve pyrolysis/thermolysis. The products are condensed and collected. This method usually requires higher… …   Wikipedia

  • Vacuum distillation — At atmospheric pressure, dimethyl sulfoxide boils at 189°C. Under a vacuum, it distills off into the connected receiver at only 70°C. Vacuum distillation is a method of distillation whereby the pressure above the liquid mixture to be distilled is …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”