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Simulation of direct chlorination of ethylene in a two-phase reactor by coupling equilibrium, kinetic and population balance models

  • Z. Moradi and M. Farsi EMAIL logo
Published/Copyright: September 1, 2020
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Abstract

The purpose of presented research is the mathematical simulation and sensitivity analysis of ethylene dichloride synthesis (EDC) through direct chlorination of ethylene in a bubble column reactor at steady state condition. In the first step, the reactor is heterogeneously simulated based on the energy and mass balance equations by coupling the mass and energy, kinetic, equilibrium, and population balance models. In the considered process, the gaseous ethylene and chlorine are dispersed and dissolved in the liquid medium and converted to EDC at the presence of a homogeneous catalyst. The population balance model is applied to calculate the heat and mass transfer area along the reactor. To investigate the accuracy of established model, the results of simulation are compared with the plant data. It is confirmed that temperature, pressure, rate of mass transfer, breakage, and coalescence phenomena change the bubble diameter and distribution in the chlorination reactor. In the second step, the effects of operating pressure and temperature on the EDC production rate are investigated by the developed model. In the third step, considering EDC production rate as the cost function the optimal operating temperature of reactor is developed at steady state condition. Based on the obtained results, the optimal operating temperature is 357 K and EDC production at the optimal condition is 23.79 mol s−1.


Corresponding author: M. Farsi, Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Islamic Republic of Iran, E-mail:

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

References

1. Kumar, T, Mohsin, R, Ghafir, MFA, Kumar, I, Wash, AM. Concerns over use of leaded aviation gasoline (AVGAS) fuel. Chem Eng Trans 2018;63:181–6. https://doi.org/10.3303/CET1863031.Search in Google Scholar

2. Khademi, M, Angooraj Taghavi, S. Optimization of ethylene oxychlorination fluidized-bed reactor using differential evolution (DE) method. Sci Iran 2017;24:1253–63. https://doi.org/10.24200/sci.2017.4109.Search in Google Scholar

3. Montebelli, A, Tronconi, E, Orsenigo, C, Ballarini, N. Kinetic and modeling study of the ethylene oxychlorination to 1,2-dichloroethane in fluidized-bed reactors. Ind Eng Chem Res 2015;54:9513–24. https://doi.org/10.1021/acs.iecr.5b01456.Search in Google Scholar

4. Jana, SK, Das, SK. Tapered bubble column using pseudoplastic non-Newtonian liquids–empirical correlation for pressure drop. Chem Chem Technol 2017;11:327–32. https://doi.org/10.23939/chcht11.03.327.Search in Google Scholar

5. Kantarci, N, Borak, F, Ulgen, KO. Bubble column reactors. Process Biochem 2005;40:2263–83. https://doi.org/10.1016/j.procbio.2004.10.004.Search in Google Scholar

6. Wachi, S, Morikawa, H. Liquid-phase chlorination of ethylene and 1,2-dichloroethane. J Chem Eng Jpn 1986;19:437–43. https://doi.org/10.1252/jcej.19.437.Search in Google Scholar

7. Wachi, S, Morikawa, H. Chlorination of ethylene in a boiling bubble column reactor. J Chem Eng Jpn 1987;20:238–45. https://doi.org/10.1252/jcej.20.238.Search in Google Scholar

8. Orejas, JnA. Modelling and simulation of a bubble-column reactor with external loop: application to the direct chlorination of ethylene. Chem Eng Sci 1999;54:5299–309. https://doi.org/10.1016/s0009-2509(99)00254-7.Search in Google Scholar

9. Abashar, M. Ethylene dichloride production in external-loop gaslift reactors. JKSUES 2004;16:179–201. https://doi.org/10.1016/s1018-3639(18)30786-4.Search in Google Scholar

10. Kurta, S, Mykytyn, I, Khatsevich, O, Ribun, V. Mechanism of catalytic additive chlorination of ethylene to 1,2-dichloroethane. Theor Exp Chem 2018;54:283–91. https://doi.org/10.1007/s11237-018-9574-6.Search in Google Scholar

11. Orejas, JnA. Model evaluation for an industrial process of direct chlorination of ethylene in a bubble-column reactor with external recirculation loop. Chem Eng Sci 2001;56:513–22. https://doi.org/10.1016/s0009-2509(00)00255-4.Search in Google Scholar

12. Halder, G. Introduction to chemical engineering thermodynamics. PHI Learning Pvt. Ltd; 2014.Search in Google Scholar

13. Selma, B, Bannari, R, Proulx, P. Simulation of bubbly flows: comparison between direct quadrature method of moments (DQMOM) and method of classes (CM). Chem Eng Sci 2010;65:1925–41. https://doi.org/10.1016/j.ces.2009.11.018.Search in Google Scholar

14. Laakkonen, M, Alopaeus, V, Aittamaa, J. Validation of bubble breakage, coalescence and mass transfer models for gas–liquid dispersion in agitated vessel. Chem Eng Sci 2006;61:218–28. https://doi.org/10.1016/j.ces.2004.11.066.Search in Google Scholar

15. Aryafard, E, Farsi, M, Rahimpour, M. Modeling and simulation of crude oil desalting in an industrial plant considering mixing valve and electrostatic drum. Chem Eng Process Process Intensific 2015;95:383–9. https://doi.org/10.1016/j.cep.2015.06.011.Search in Google Scholar

16. Kakhki, NA, Farsi, M, Rahimpour, M. Effect of current frequency on crude oil dehydration in an industrial electrostatic coalescer. J Taiwan Inst Chem E 2016;67:1–10.10.1016/j.jtice.2016.06.021Search in Google Scholar

17. Kumar, S, Ramkrishna, D. On the solution of population balance equations by discretization—I. A fixed pivot technique. Chem Eng Sci 1996;51:1311–32. https://doi.org/10.1016/0009-2509(96)88489-2.Search in Google Scholar

18. Perry, JH. Chemical engineers’ handbook. ACS Publications; 1950.10.1021/ed027p533.1Search in Google Scholar

19. Poling, BE, Prausnitz, JM, O’connell, JP The properties of gases and liquids. New York: Mcgraw-hill; 2001, vol. 5.Search in Google Scholar

20. Reid, RC, Prausnitz, JM, Poling, BE. The properties of gases and liquids; 1987.Search in Google Scholar

21. Fukushima, S, Kusaka, K. Liquid-phase volumetric and mass-transfer coefficient, and boundary of hydrodynamic flow region in packed column with cocurrent downward flow. J Chem Eng Jpn 1977;10:468–74. https://doi.org/10.1252/jcej.10.468.Search in Google Scholar

22. Cho, JS, Wakao, N. Determination of liquid-side and gas-side volumetric mass transfer coefficients in a bubble column. J Chem Eng Jpn 1988;21:576–81. https://doi.org/10.1252/jcej.21.576.Search in Google Scholar

23. Specchia, V, Baldi, G. Pressure drop and liquid holdup for two phase concurrent flow in packed beds. Chem Eng Sci 1977;32:515–23. https://doi.org/10.1016/0009-2509(77)87008-5.Search in Google Scholar

24. Farsi, M, Jahanmiri, A. Methanol production in an optimized dual-membrane fixed-bed reactor. Chem Eng Process: Process Intensific 2011;50:1177–85. https://doi.org/10.1016/j.cep.2011.08.011.Search in Google Scholar

Received: 2020-06-16
Accepted: 2020-07-10
Published Online: 2020-09-01

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