Modeling and Optimization of Ethylene Oxychlorination Fluidized Bed Reactor in Arvand Petrochemical Complex

Document Type : Research Article


Faculty of Chemical, Oil and Gas Engineering, Shiraz University, Shiraz, I.R. IRAN


The main goal of this research is the modeling and optimization of the ethylene oxychlorination reactor in the Arvand Petrochemical Complex. In this process, the dichloroethane is produced through the oxychlorination of ethylene on CuCl3 supported Al2O3 catalyst. The ethylene oxychlorination reaction occurs in a fluidized bed reactor equipped with a heat exchanger to control operating temperature. In the industrial plant, the oxychlorination and direct chlorination processes are in parallel and produced HCl in the direct chlorination and EDC cracking units fed to the oxychlorination reactor. In this research, the oxychlorination reactor is modeled based on the mass and energy balance equations at steady-state conditions. Due to fluid specifications and flow regime, a two-phase flow regime including bubble and emulsion phases with mass transfer between phases is selected to simulate the reactor. To prove the accuracy and precision of the considered model and assumptions, the simulation results are compared with the plant data. Then, an optimization problem is programmed to maximize the dichloroethane production rate based on the design and operating limitations considering feed temperature, coil temperature, operating pressure, and mass flow rate of hydrogen chloride and oxygen as decision variables. The simulation results show that applying the optimal operating condition on the system increases dichloroethane production from 128.7 to 141.3 mol/s.


Main Subjects

[1] Magistro A.J., Cowfer, J.A., Oxychlorination of Ethylene, Journal of Chemical Education, 63: 1056-1058 (1986).
[2] Arzani S., Esfeh H.K., Zadeh Y.G., Akbari V., Parametric Studies of Ethylene Dichloride Purification Process. World Academy of Science, Engineering and Technology, International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering, 9(9): 1184-1187 (2017).
[3] Vajglová Z., Kumar N., Eränen K., Peurla M., Murzin D.Y., Salmi T., Ethene Oxychlorination over CuCl2/γ-Al2O3 Catalyst in Micro-and Millistructured Reactors, Journal of Catalysis, 364: 34-344 (2018).
[4] Wachi S., Asai Y., Kinetics of 1, 2-Dichloroethane Formation from Ethylene and Cupric Chloride, Industrial & Engineering Chemistry Research, 33(2): 259-264 (1994).
[5] Carrubba R., Spencer J., Kinetics of the Oxychlorination of Ethylene, Industrial & Engineering Chemistry Process Design and Development, 9(3): 414-419 (1970).
[6] Montebelli A., Tronconi E., Orsenigo C., Ballarini N., Kinetic and Modeling Study of the Ethylene Oxychlorination to 1, 2-Dichloroethane in Fluidized-Bed Reactors, Industrial & Engineering Chemistry Research, 54(39): 9513-9524 (2015).
[7] Al-Zahrani S., Aljodai A., Wagialla K., Modelling and Simulation of 1, 2-Dichloroethane Production by Ethylene Oxychlorination in Fluidized-Bed Reactor, Chemical Engineering Science, 56(2): 621-626 (2001).
[8] Moreira J., Pires C., Modelling and Simulation of an Oxychlorination Reactor in a Fluidized Bed, The Canadian Journal of Chemical Engineering, 88(3): p. 350-358 (2010).
[9] Go K.S., Kim Y., Son S.R., Kim, S.D., 1,2-Dichloroethane Production by Two-Step Oxychlorination Reactions in a Uidized Bed Reactor, Chem. Eng. Sci., 65, 499-503 (2010)
[10] Faghih S.M., Kianfar E., Modeling of Fluid Bed Reactor of Ethylene Di Chloride Production in Abadan Petrochemical Based on Three-Phase Hydrodynamic Model, International Journal of Chemical Reactor Engineering, 16 (1018).
[11] Khademi M., Taghavi S.A., Optimization of Ethylene Oxychlorination Fluidized-Bed Reactor Using Differential Evolution (DE) Method, Scientia Iranica. Transaction C, Chemistry, Chemical Engineering, 24(3): 1253-1263 (2017).
[12] Mahecha-Botero A., Grace J.R., Elnashaie S.S.E.H., Lim C.J., Advances in Modeling of Fluidized-Bed Catalytic Reactors: A Comprehensive Review, Chemical Engineering Communications, 196(11): 1375-1405 (2009).
[13] Fryer C., Potter O.E., Bubble Size Variation in Two-Phase Models of Fluidized Bed Reactors, Powder Technology, 6: 317-322 (1972).
[14] Toor, F., P. Calderbank, “Modeling of Fluidized bed Reactors”, Proceedings of the Tripartite Chemical Engineering Conference. (1968).
[15] Holland F., Bragg R., “Fluid Flow for Chemical and Process Engineers”, Elsevier, New York (1995).
[16] Daizo K., Levenspiel O., “Fluidization Engineering”,  Butterworth-Heinemann, New York (2013).
[17] Holman J., “Heat Transfer”, McGraw-Hill, New York (2001).
[18] Polling B.E., Prausnitz J. M., O’Connell J.P., “The Properties of Gases and Liquids”, McGraw Hill, New York (2000).
[19] Gilat A., Subramaniam V., “Numerical Methods for Engineers and Scientists: An Introduction with Applications Using MATLAB ”. John Wiley & Sons Inc., New Jersey (2008)
[20] Coley, D.A., “An Introduction to Genetic Algorithms for Scientists and Engineers”. World Scientific Publishing Company, Singapore (1999).