Comparative Analysis Between Manual and Computer Aided Design of Minimum and Optimum Reflux Ratio at Minimum Reflux Operating Condition of a Distillation Column
American Journal of Science, Engineering and Technology
Volume 1, Issue 2, December 2016, Pages: 13-19
Received: Oct. 30, 2016; Accepted: Nov. 30, 2016; Published: Dec. 21, 2016
Views 3118      Downloads 107
Okafor Blessing, Department of Chemical Engineering, Chukwuemeka Odumegwu Ojukwu University, Anambra, Nigeria
Effiong Edward, Department of Chemical Engineering, Federal University of Technology, Owerri, Nigeria
Article Tools
Follow on us
This work presents the comparative analysis between manual and computer aided design of minimum and optimum reflux ratio at minimum reflux condition of a distillation column. The Underwood’s shortcut design model for determining a column’s minimum reflux ratio is applied, and a multiplier of the minimum reflux is used to obtain the optimum reflux ratio of the column. Matlab R2008b is the computer software used to achieve the computer aided design of the reflux due to the need for fast convergence solution to iterative computations. The manual design is a pen and paper approach. The results obtained from both methods were compared for better analysis of the column’s separation efficiency at the reflux operating conditions.
Reflux Ratio, Underwood Model, Design, MATLAB
To cite this article
Okafor Blessing, Effiong Edward, Comparative Analysis Between Manual and Computer Aided Design of Minimum and Optimum Reflux Ratio at Minimum Reflux Operating Condition of a Distillation Column, American Journal of Science, Engineering and Technology. Vol. 1, No. 2, 2016, pp. 13-19. doi: 10.11648/j.ajset.20160102.11
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The Math Works Inc., “Learning MATLAB 7.0, fifth printing revised for MATLAB 7.1, 2005.
David Houcque, “Introduction to Matlab for Engineering Students”, Version 1.2, 2005, pp. 1-10; 35-51, North-western University.
A. J. V. Underwood, “Ind. Eng. Chemistry”, Vol. 41, No. 12, 1948, pp 2844-2847.
J. D. Seader, E. J. Henley, “Separation process principles”, 2nd edition, 2001, John Wiley and sons Inc., New York, USA.
J. F. Richardson, J. H. Harker, and J. R. Backhurst, Coulson and Richardson’s Chemical Engineering series: “Particle technology and separation processes”, Vol. 2, fifth ed., Oxford: Butterworth-Heinemann, 2002, pp. 599-616.
R. N. Shiras, D. N. Hanson, and C. H. Gibson, Industrial and Engineering Chemistry: “Calculation of minimum reflux in distillation columns”, 1950, pp 871-876.
R. E. Treybal, “Mass transfer operations”, 3rd ed., 1980, McGraw-Hill, New York.
H. Z. Kister, “Distillation design analysis”, 1992, pp. 2; 87-123, McGraw-Hill Inc., New York.
C. J. King, “Separation processes”, 1980, McGraw-Hill Inc., New York.
R. Sinnott, G. Towler, Coulson & Richardson’s Chemical Engineering series: “Chemical engineering design”, vol. 6, fifth ed., Butterworth-Heinemann, Burlington, USA, 2009, pp 682-715; 1121-1133.
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
Tel: (001)347-983-5186