Advanced exergy analysis of distillation tower and simulation and optimization by hysys

  • Authors

    • Mohsen Darabi Young Researchers and Elite Club, shahrood Branch, Islamic Azad University , shahrood , Iran
    • Hamid Mohammadiun Department of Mechanical Engineering,Shahrood Branch
    • Mohammad Mohammadiun Department of Mechanical Engineering,Shahrood Branch
    2015-05-03
    https://doi.org/10.14419/ijsw.v3i1.4582
  • Hysys, Exergy Analysis, Simulation and Optimization, Multicomponent.

  • Abstract

    Exergy rate profiles, exergetic efficiency and irreversibility were used to examine the driving forces in multicomponent distillation system with the view to identifying feasible and efficient operating parameters. The mixture comprised of 5% propane, 15% iso butane, 25% n-butane, 20% iso pentane and 35% n-pentane. Operating variables were feed temperature (-30oC and -80oC), pressure (800KPa and 1200KPa), and reflux-ratio (2 and 6). Sensitivity analysis was carried out to examine the effect of varying operating parameters on the systems. Stage-by-stage system exergy analysis was estimated. Column profiles of a base case -30oC, -80oC, -30oC-reflus ratio 6,80oC -80oC reflux ratio 6 and base case reflux ratio 6 did not cross thus are thermodynamically feasible. Base case -30oC-reflux ratio 2, -80oC-reflux ratio 2, and base case-reflux ratio 2 were crossed and constricted and are infeasible. Base case results gave efficiency of 81.7% at depropanizer and 65.2% at debutanizer. Base cases sensitivity results with -30oC, -80oC and reflux ratio 6, efficiency range 57.40 – 70% and 65.20% - 54.90% for depropanizer and debutanizer respectively. Spitted cases gave 81.7% and 62.20% with more scatter profiles. Splitted feed base case -30oC design gave the lowest overall system exergy loss rate of 1.12E+6 and efficiency of 95.70%.

  • References

    1. [1] Alatiqi, I.M. and Luyben, W.L. Alternative distillation configurations for separating ternary mixtures with small concentration of intermediate in the feed, Ind Eng Chem Process Des Dev, 24, 1985, 500–506 http://dx.doi.org/10.1021/i200029a047.

      [2] Al-Muslim H., and Dincer I. Thermodynamic analysis of crude oil distillation systems, International Journal of Energy Research, 29, 2005, 637 http://dx.doi.org/10.1002/er.1097.

      [3] Blancarte-Palacios, J.L., Bautista-Valde’s, M.N., Herna’ndez, S., Rico-Ramı’rez, V. and Jime’nez, A. Energy-efficient designs of thermally coupled distillation sequences for four-component mixtures, Ind Eng Chem Res, 21, 2003, 5157–5164 http://dx.doi.org/10.1021/ie030297k.

      [4] Christiansen, A.C., Skogestad, S. and Lien, K. Complex distillation arrangements: extending the Petlyuk idea, Comput Chem Eng, 21, 1997, S237–S242. http://dx.doi.org/10.1016/S0098-1354(97)87508-4.

      [5] Demirel, Y. Retrofit of distillation columns using thermodynamic analysis. Separation Sciences and Technology, 41, 2006, 791 817. http://dx.doi.org/10.1080/01496390600600047.

      [6] Dhole V.R., and Linnhoff B. Distillation Column Targets, Computers and Chemical Engineering 17, 1993, 549-560. http://dx.doi.org/10.1016/0098-1354(93)80043-M.

      [7] Engelien HK, Larsson T, and Skogestad S. Implementation of Optimal Operation for Heat IntegratedDistillation Columns, Trans Inst Chem Eng; 81, 2003, 277–81. http://dx.doi.org/10.1205/026387603762878755.

      [8] Faria, S.H.B., and Zemp, R. J. Using exergy loss profiles and enthalpy-temperature profiles for the evaluation of thermodynamic efficiency in distillation columns, J. Thermal Engineering, Vol. 4, No. 4, 2005, 76 -82.

      [9] Flores, O. A., Cardenas, C., Hernandez, S., and RicoRamyrez, V. Thermodynamic Analysis of Thermally Coupled Distillation Sequences, Ind. Eng. Chem. Res., 42, 2003, 5940. http://dx.doi.org/10.1021/ie034011n.

      [10] Finn, A.J. Consider thermally coupled distillation, Chem Eng Prog, 10, 1993, 41–45.

      [11] Fidkowski, Z. and Krolikowski, L. Energy requirements of nonconventional distillation systems, AIChE J, 36, 1990, 1275–1278 http://dx.doi.org/10.1002/aic.690360820.

      [12] Glinos, K. and Malone, F. Optimality regions for complex column alternatives in distillation systems, Trans IChemE, Part A, Chem Eng Res Des., 66, 1998, 229–240.

      [13] Herna’ndez, S. and Jime’nez, A. Design of optimal thermally-coupled distillation systems using a dynamic model, Trans IChemE, Part A, Chem Eng Res Des., 74, 1996, 357–362.

      [14] Herna’ndez, S. and Jime’nez, A. Design of energy-efficient Petlyuk systems, Comput Chem Eng, 23, 1999a, 1005–1010. http://dx.doi.org/10.1016/S0098-1354(99)00257-4.

      [15] Hsuan, C., and Jr-Wie, L., A new exergy method for process analysis and optimization, Chemical Engineering Science., 60, 2005, 2771 http://dx.doi.org/10.1016/j.ces.2004.12.029.

      [16] King, C.J., Separation Processes (McGraw-Hill, New York, 2nd edition, 1980).

      [17] Le Goff, P., and Hornut, J.M. Exergy analysis and exergo-economic optimization of industrial process (Janvier-Fevrier, 1998).

      [18] Linnhoff, B. and Alanis, F. J. Integration of a New Process into an Existing Site: A Case Study in the Application of Pinch Technology," ASME Journal of Engineering for Gas Turbines and Power, Vol. 113, 1991, 159-169. http://dx.doi.org/10.1115/1.2906537.

      [19] Le Goff, P., Cachot, T. and Rivero, R. Exergy analysis of distillation process. Chemical Engineering and Technology, Vol. 19, 1996, 478 – 485 http://dx.doi.org/10.1002/ceat.270190603.

      [20] Maia M. L. O., Zemp R.J. Thermodynamic analysis of multicomponent distillation columns: identifying optimal feed conditions, Brazilian Journal of Chemical Engineering, vol 17, 2000, 751-759. http://dx.doi.org/10.1590/S0104-66322000000400038.

      [21] Olujic, Z., Fakhri, F., De Rijke, A., De Graauw J., and Jansens, P.J. Internal heat integration – the key to an energy-conserving distillation column, Journal of Chemical Technology and Biotechnology. 78, 2003, 241 http://dx.doi.org/10.1002/jctb.761.

      [22] Rivero, R., 1993, "L'Analyse d'Exergie: Application à la Distillation Diabatique et aux Pompes à Chaleur à Absorption", PhD thesis, Institut National Polytechnique de Lorraine, Nancy, France.

      [23] Rivero, R., and Koeijer, G. Entropy production and exergy loss in experimental distillation columns, Chemical Engineering Science, 58, 2003, 1587. http://dx.doi.org/10.1016/S0009-2509(02)00627-9.

      [24] Rong, B., Kraslawski, A., and Nystrom, L. The synthesis f thermally coupled distillation flowsheets for separations of five component mixture, Computers Chem. Engng., 24, 2000, 247 – 252. http://dx.doi.org/10.1016/S0098-1354(00)00466-X.

      [25] Ruchira, T., and Masaru, I. Graphical exergy analysis of processes in distillation column by energy utilization diagrams. AIChE Journal, Vol. 42, No 6, 1996, 1633-1641. http://dx.doi.org/10.1002/aic.690420615.

      [26] Tedder, D.W. and Rudd, D.F. Parametric studies in industrial distillation: Part I. Design comparisons. AIChE J, 24: 1978, 303-315. http://dx.doi.org/10.1002/aic.690240220.

      [27] Santanu, B. Effect of feed on optimal thermodynamic performance of a distillation column. Chemical Engineerin Journal, Vol. 88. 2002, 175-186. http://dx.doi.org/10.1016/S1385-8947(01)00303-5.

      [28] Taprap, R., and Ishida, M. Graphic exergy analysis of processes in distillation column by energy-utilization diagrams, AIChE Journal, Vol. 42, No. 6, 1996, 1633. http://dx.doi.org/10.1002/aic.690420615.

      [29] Zemp R.J., de Faria S.H.B, Maia M.L.O. Driving force distribution and exergy loss in the thermodynamic analysis of distillation columns, Computers and Chemical Engineering, Vol 21S, 1997, S52 http://dx.doi.org/10.1016/S0098-1354(97)87555-2.

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  • How to Cite

    Darabi, M., Mohammadiun, H., & Mohammadiun, M. (2015). Advanced exergy analysis of distillation tower and simulation and optimization by hysys. International Journal of Scientific World, 3(1), 163-177. https://doi.org/10.14419/ijsw.v3i1.4582

    Received date: 2015-04-05

    Accepted date: 2015-04-28

    Published date: 2015-05-03