Design of a Medium-scale Circulating Fluidized Bed Reactor for Chlorination of processed Aluminum Oxide
Keywords:CPFD simulation, alumina chlorination, Circulating Fluidized Bed Reactor (CFBR), reactor design, Barracuda, fluidization, multiphase flow
AbstractFluidization is a well-established and widely used technology in the process industry. The production stability and the large effective contact area between the active substances, resulting in high mass and heat transfer between the phases, are some of the main advantages of fluidization. However, this technology has not yet been adequately developed for alumina chlorination as a standard solution on an industrial scale. Although a circulating fluidized bed reactor design is complex by its nature, it is advantageous to simulate the process compared to running experiments on a lab scale. The Computational Particle-Fluid Dynamic (CPFD) simulation lays a foundation for studying the given reaction process. The reaction between the solid alumina particles and the gaseous chlorine and carbon monoxide results in the products (aluminum chloride and carbon dioxide). The present study aims to design a circulating fluidized bed reactor by simulating the process in Barracuda®. Simulations with a simple geometry contributed to a better understanding of the reaction process. Then the simulation results are compared with values from both a theoretical approach and parallel simulations in Aspen Plus®. The comparison revealed that the results from Barracuda® Virtual Reactor (VR), such as product flow rate, are within a reasonable range of what could be expected in a full-scale plant. The promising preliminary results imply that CPFD could be a promising approach for future research on the design, optimization, and implementation of the industrial alumina chlorination process. The final design includes a fluidized bed reactor with a 2.4 m internal diameter and 8 m height and four parallel internal cyclones on top.
A. Abrahamsen and D Geldart. Behavior of gas-fluidized beds of fine powders part I. Homogeneous expansion. Powder Technology, 26(1), 35–46, 1980. doi:10.1016/0032-5910(80)85005-4
N. Ahmadpour Samani, C, Jayarathna, and L.A.Tokheim. Fluidized bed calcination of cement raw meal: Laboratory experiments and CPFD simulations. In Proceedings - 61st SIMS Conference on Simulation and Modelling SIMS 2020, 2020. doi:10.3384/ecp20176407
Z. Barahmand. Design of an Industrial Chlorination Reactor Using CPFD Simulations, Master Thesis, University of South-Eastern Norway, 2021.
Z. Barahmand, C. Jayarathna, and C. Ratnayake. Sensitivity and uncertainty analysis in a fluidized bed reactor modeling. In Proceedings - 1st SIMS EUROSIM Conference on Modelling and Simulation, Finland, 2021a.
Z. Barahmand, C. Jayarathna, and C. Ratnayake. The effect of alumina impurities on chlorination in a fluidized bed reactor: A CPFD study. In Proceedings - 1st SIMS EUROSIM Conference on Modelling and Simulation, Finland, 2021b.
Barracuda User Manual. CPFD Software, 2021. https://cpfd-software.com/
Ø. Bjarte. Carbochlorination routes in production of Al, pages 57, SINTEF Industry, 2018.
A. N. Chandran, S. S. Rao, and Y. B. G. Varma. Fluidized bed drying of solids. AIChE Journal, 36(1), 29–38, 1990. doi:10.1002/aic.690360106
Y. N. Chang and F. I. Wei. High-temperature chlorine corrosion of metals and alloys. Journal of Materials Science, 26(14), 3693–3698, 1991. doi: 10.1007/BF01184958
R. Cocco, S. Karri, and T. Knowlton. Introduction to Fluidization. Chemical Engineering Progress, 110, 21–29, 2014.
M. Davies. Alloy selection for service in chlorine, hydrogen chloride and hydrochloric acid. Nickel Institute, 2018.
HAYNES® 214® ALLOY. Haynes International, Inc. 2008. haynes.ch/doc/haynes/214_h3008.pdf
A. V. Kulkarni, S. V. Badgandi, and J. B. Joshi. Design of ring and spider-type spargers for bubble column reactor: Experimental measurements and CFD simulation of flow and weeping. Chemical Engineering Research and Design, 87(12), 1612–1630, 2009. doi:10.1016/j.cherd.2009.06.003
D. Kunii and O. Levenspiel. Fluidization Engineering. Butterworth-Heinemann, 1991.
Z. Liu, G. Wang, and J. Yi. Study on heat transfer behaviors between Al-Mg-Si alloy and die material at different contact conditions based on inverse heat conduction algorithm. Journal of Materials Research and Technology, 9(2), 1918–1928, 2020. doi:10.1016/j.jmrt.2019.12.024 National Fuels and Energy Conservation Act. S. 2176, U.S. Government Printing Office, 1973.
J. H. Perry. Chemical Engineers’ Handbook (Third Edition). McGraw-Hill, New York, 1950.
Y. K. Rao and M. K. Soleiman. Alumina chlorination. United States Patent No. US4565674A, 1986.
M. A. Rhamdhani, M. Dewan, G. Brooks, B. Monaghan, and L. Prentice. Alternative Al Production Methods: Part 1. A Review. Mineral Processing and Extractive Metallurgy IMM Transactions Section C, 122, 87–104, 2013.
Survey of potential processes for the manufacture of aluminium, ANL/OEPM-79-4. Little , D. Arthur, Inc., Cambridge, MA, USA, 1979. doi:10.2172/5669730
J. Thonstad. Aluminium Electrolysis: Fundamentals of the Hall-Héroult Process. Aluminium-Verlag, 2001.
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