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Received May 12, 2020
Accepted July 7, 2020
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Purification of R-12 for refrigerant reclamation using existing industrial-scale batch distillation: design, optimization, simulation, and experimental studies
School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea 1OunR2tech Co. Ltd, Pohang 37553, Korea
Korean Journal of Chemical Engineering, November 2020, 37(11), 1823-1828(6), 10.1007/s11814-020-0631-1
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Abstract
Many design variables and constraints, such as operating temperature and pressure of existing batch distillation or operating temperature of existing cooling and heating media, must be verified and satisfied during design and optimization when an existing batch distillation column is utilized for new mixture. The convergence of batch distillation simulation is sensitive with the initial values of these variables. Thus, a new systematic methodology was proposed to design and optimize separation of a new mixture using an existing batch column. The systematic methodology was based on an industrial case study of dichlorodifluoromethane (R-12) reclamation from a waste refrigerant mixture. Based on a comparison of the Pxy diagram with experimental data, “REFerence fluid PROPerties” was selected as the thermodynamic model. After design and optimization using shortcut and rigorous methodologies, the existing batch distillation unit was operated to validate the proposed methodology. The experimented performance match well with the simulated results. Under the optimized operating condition, complete purification of R-12 (purity=99.5%) was achieved experimentally after 28.3 h. The advantages and disadvantages of the proposed methodology were then discussed.
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Long NVD, Han TH, Lee DY, Park SY, Hwang BB, Lee M, Energies, 12, 3776 (2019)
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Tarancon G, US Patent, 8,075,742 (2011).
Yates SF, US Patent, 4,906,796A (1990).
Shields CJ, Swindells AS, US Patent, 5,288,930 (1994).
Corbin DR, Diebold MP, Mahler BA, US Patent, 5,585,529 (1996).
Heyduk AF, Mouk RW, Abel AE, US Patent, 5,497,627 (1996).
Diwekar U, Batch distillation - simulation, optimal design, and control, CRC press, Boca Raton (2012).
Sorensen E, in Distillation, Elsevier, Amsterdam (2014).
Lee YJ, Jeong H, Park HK, Park KY, Kang TW, Cho J, Kim DS, Korean J. Chem. Eng., 33(8), 2418 (2016)
Long NVD, Lee DY, Park SY, Hwang BB, Lee M, Chem. Eng. Process., 148, 1 (2020)
Garcia AN, Loria JDCZ, Bravo LEV, Uribe JAR, J. Eng., 14, 1 (2013)
Sundaram S, Evans LB, Ind. Eng. Chem. Res., 32, 511 (1993)
Diwekar UM, Madhavan KP, Ind. Eng. Chem. Res., 30, 713 (1991)
Barolo M, Guarise GB, Chem. Eng. Res. Des., 74(8), 863 (1996)
Kleiber M, Fluid Phase Equilib., 92, 149 (1994)
