Simulated Heat Integration Study of Reactive Distillation Column for Ethanol Synthesis

Document Type : Research Article

Authors

Department of Chemical Engineering, Malaviya National Institute of Technology Jaipur, Jaipur-302017, INDIA

Abstract

Ethanol is largely used as a solvent in the synthesis of varnishes and perfumes. It is also used as a preservative for biological products, fuel, and gasoline additives. Anethanol-water mixture, normally obtained by fractional distillation yields an azeotropic solution consisting of approximately 95 w% of ethanol. The synthesis of ethanol in a reactive distillation column with the azeotropic feed at 20ºC with ethylene oxide as another reactant feed for the reaction with water to produce ethylene glycol was simulated in Aspenplus. Simulated results show 98.82 mol% purity of ethanol in the reactive distillation column. In order to reduce the energy consumption in reactive distillation, a Reactive Heat Integrated Distillation Column (R-HIDiC) is proposed for the same purity of ethanol product. From the simulated results, it has been found that the overall energy utilization in the proposed distillation column is reduced by 65% as compared to the conventional reactive distillation column. The pressure profile, temperature profile, and concentration profile of the reactive distillation column and the column proposed are also compared.

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References

[1] Tavan Y., Hosseini S.H., Design and Simulation of a Reactive Distillation Process to Produce High-Purity Ethyl Acetate, J. Taiwan Inst. Chem. Eng., 44(4):  577-585 (2013).
[2] Nakaiwa M., Huang K., Endo A., Ohmori T., Akiya T., Takamatsu T., Internally Heat-Integrated Distillation Columns: A Review, Chem. Eng. Res. Des., 81(1): 162-177 (2003).
[3] Olujic Z., Fakhri F., De Rijke A., De Graauw J., Jansens P.J., Internal Heat Integration “the Key to an Energy Conserving Distillation Column, J. Chem. Technol. Biot., 78 (23):  241-248 (2003).
[4] Gadalla M.A., Internal Heat Integrated Distillation Columns (iHIDiCs)—New Systematic Design Methodology, Chem. Eng. Res. Des., 87 (12):  1658-1666 (2009).
[5] Suphanit B., Design of Internally Heat-Integrated Distillation Column (HIDiC): Uniform Heat Transfer Area Versus Uniform Heat Distribution, Energy., 35 (3): 1505-1514 (2010).
[6] De Rijke A., “Development of a Concentric Internally Heat Integrated Distillation Column (HIDiC)”, TU Delft, Delft University of Technology (2007).
[7] Glavic P., Complex Integration of Processes, Can. J. Chem. Eng., 79 (4):  643-654 (2001).
[8] Horiuchi K., Yanagimoto K., Kataoka K., “Nakaiwa M., Energy-Saving Characteristics of Heat Integrated Distillation Column Technology Applied to Multi-Component Petroleum Distillation”, In: Institution of Chemical Engineering Symposium Series, p. 172. Institution of Chemical Engineers (2006).
[9] Iwakabe K., Nakaiwa M., Huang K., Nakanishi T., Rosjorde A., Ohmori T., Endo A., Yamamoto T., Energy Saving in Multicomponent Separation Using an Internally Heat-Integrated Distillation Column (HIDiC), Appl. Therm. Eng., 26 (13): 1362-1368 (2006).
[10] Mulia-Soto J.F., Flores-Tlacuahuac A., Modeling, Simulation and Control of an Internally Heat Integrated Pressure-Swing Distillation Process for Bioethanol Separation, Comput. Chem. Eng., 35(8):  1532-1546 (2011).
[11] Zhu Z., Wang L., Ma Y., Wang W., Wang Y., Separating an Azeotropic Mixture of Toluene and Ethanol via Heat Integration Pressure Swing Distillation, Comput. Chem. Eng., 76: 137-149 (2015).
[12] Li R., Ye Q., Suo X., Dai X., Yu H., Heat-Integrated Pressure-Swing Distillation Process for Separation of a Maximum-Boiling Azeotrope Ethylenediamine/Water, Chem. Eng. Res. Des., 105: 1-15 (2016).
[13] Hernandez S., Pereira Pech S., Jimenez A., Rico Ramirez V., Energy Efficiency of an Indirect Thermally Coupled Distillation Sequence, Can. J. Chem. Eng., 81 (5): 1087-1091 (2003).
[14] Dirk-Faitakis C.B., An W., Lin T.-B., Chuang K.T., Catalytic Distillation for Simultaneous Hydrolysis of Methyl Acetate and Etherification of Methanol, Chem. Eng Process. Process Intensification. 48 (5):  1080-1087 (2009).
[15] Kumar M.P., Kaistha N., Role of Multiplicity in Reactive Distillation Control System Design, J. Process. Contr., 18 (7): 692-706 (2008).
[16] Noeres C., Kenig E., Gorak A., Modelling of Reactive Separation Processes: Reactive Absorption and reactive distillation, Chem. Eng Process. Process Intensification, 42 (3):  157-178 (2003).
[17] Wang S., Wong D., Lee E., Effect of Interaction Multiplicity on Control System Design for a MTBE Reactive Distillation Column, J. Process. Contr., 13(6):  503-515 (2003).
[18] Wang S.-J., Wong D.S., Control of Reactive Distillation Production of High-Purity Isopropanol, J. Process. Contr., 16(4): 385-394 (2006).
[19] Tavan Y., Hosseini S.H., A Novel Integrated Process to Break the Ethanol/Water Azeotrope Using Reactive Distillation “Part I: Parametric Study, Sep. Purif. Technol., 118: 455-462 (2013).
[20] Olujić Ž., Sun L., De Rijke A., Jansens P., Conceptual Design of an Internally Heat Integrated Propylene-Propane Splitter, Energy., 31 (15):  3083-3096 (2006).
[21] Takamatsu T., Nakaiwa M., Huang K., Akiya T., Noda H., Nakanishi T., Aso K., Simulation Oriented Development of a New Heat Integrated Distillation Column and Its Characteristics for Energy Saving, Comput. Chem. Eng., 21: S243-S247 (1997).
[22] Huang K., Matsuda K., Iwakabe K., Takamatsu T., Nakaiwa M., Interpreting Design of an Ideal Heat-Integrated Distillation Column Through Exergy Analysis, Journal of Chemical Engineering of Japan, 39(9): 963-970 (2006).
[23] Mah R.S.H., Nicholas J.J., Wodnik R.B., Distillation with Secondary Reflux and Vaporization: A Comparative Evaluation, AIChE J., 23(5): 651-658 (1977).
[24] Olujić Ž., Sun L., Gadalla M., De Rijke A., Jansens P., Enhancing Thermodynamic Efficiency of Energy Intensive Distillation Columns via Internal Heat Integration, Chem. Biochem. Eng. Q., 22(4): 383-392 (2008).
[25] Campbell J.C., Wigal K., Van Brunt V., Kline R., Comparison of Energy Usage for the Vacuum Separation of Acetic Acid/Acetic Anhydride Using an Internally Heat Integrated Distillation Column (HIDiC), Separ. Sci. Technol., 43 (9-10):  2269-2297 (2008).
[26] Vanaki A., Eslamloueyan R., Steady-State Simulation of a Reactive Internally Heat Integrated Distillation Column (R-HIDiC) for Synthesis of Tertiary-Amyl Methyl Ether (TAME), Chem. Eng. Process. : Process Intensification. 52: 21-27 (2012).
[27] Pulido J.L., MartÃnez E.L., Maciel M.R.W., Maciel Filho R., Heat Integrated Reactive Distillation Column (r-HIDiC): Implementing A New Technology distillation, Chem. Eng. Trans., 24: 1303-1308 (2011).
[28] Huang K., Nakaiwa M., Wang S.J., Tsutsumi A., Reactive Distillation Design with Considerations of Heats of Reaction, AIChE Journal, 52 (7): 2518-2534 (2006).
[29] Dimian M.C., “Integrated Design and Simulation of Chemical Processes, Integration of Design and Control, Computer Aided Chemical Engineering, Elsevier, 13: 501-554 (2003). 
Iranian Journal of Chemistry and Chemical Engineering
Volume 38, Issue 4 - Serial Number 96
July and August 2019
Pages 183-191

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