Modeling and Simulation of Sulfur Hexafluoride (SF<sub>6</sub>) Purification Process

Joo Yeob Lee; Yeong-Koo Yeo; Heung Man Moon; Doo Seon Park

Korean Journal of Chemical Engineering, Vol.17, No.2, 252-256, March, 2000

DOI10.1007/BF02707153 Export Citation

Modeling and Simulation of Sulfur Hexafluoride (SF₆) Purification Process

Joo Yeob Lee, Yeong-Koo Yeo , Heung Man Moon¹, and Doo Seon Park^{1, †}

Department of Chemical Engineering, Hanyang University, 17 Haengdang-dong, Sungdongku, Seoul 133-791, Korea
¹Daesung Cryogenic Research Institute, Daesung Sanso Co., Ltd., Korea

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Liquid sulfur hexafluoride (SF₆) contains carbon tetrachloride (CF₄) and air as main impurities. It is very difficult to remove these impurities by using a catalyst column or an adsorption column. In this work a new purification method SF₆ mixture based on batch distillation is proposed. Experimental study showed good purification performance, where SF₆N50 was obtained from SF₆N30 feed. In the modeling of the batch purification process of SF₂ mixture, the K-value was calculated based on the regular solution theory and a short cut method was employed. Results of simulations showed good agreement with thoes of experiments.

Keywords:Sulfur Hexafluoride;Batch Distillation;Purification;Regular Solution Theory

[References]

Distefano GP, AIChE J., 14, 190 (1968)
Diwekar UM, Comput. Chem. Eng., 18(S), 451 (1994)
Gmehling J, Ind. Eng. Chem. Process Des. Dev., 21, 118 (1982)
Gmehling J, Ind. Eng. Chem. Res., 32, 178 (1993)
Grant MH, "Fluorine Chemistry: A Comprehensive Treatment," John Wiley & Sons Inc.,, 188 (1995)
Luyben WL, "Process Modeling Simulation and Control for Chemical Engineers," 2nd ed., 7, McGraw-Hill Publishing, 72 (1990)
Marshall N, "Encyclopedie des Gaz Gas Encyclopaedia," Elsevier Scientific Publishing, 861 (1976)
Prausnitz JM, AIChE J., 7, 682 (1961)
Prausnitz JM, "Molecular Thermodynamics of Fluid-Phase Equilibria," 2nd ed., Prentice-Hall Inc., 389 (1986)
Takaiki, TAKAIOSU GASU, 13(4), 153 (1976)
Walas SM, "Phase Equilibria in Chemical Engineering," Butter-worth Publishers, 329 (1985)

[Referenced By]

[Related Articles]

[1] Distefano GP, AIChE J., 14, 190 (1968)

[2] Diwekar UM, Comput. Chem. Eng., 18(S), 451 (1994)

[3] Gmehling J, Ind. Eng. Chem. Process Des. Dev., 21, 118 (1982)

[4] Gmehling J, Ind. Eng. Chem. Res., 32, 178 (1993)

[5] Grant MH, "Fluorine Chemistry: A Comprehensive Treatment," John Wiley & Sons Inc.,, 188 (1995)

[6] Luyben WL, "Process Modeling Simulation and Control for Chemical Engineers," 2nd ed., 7, McGraw-Hill Publishing, 72 (1990)

[7] Marshall N, "Encyclopedie des Gaz Gas Encyclopaedia," Elsevier Scientific Publishing, 861 (1976)

[8] Prausnitz JM, AIChE J., 7, 682 (1961)

[9] Prausnitz JM, "Molecular Thermodynamics of Fluid-Phase Equilibria," 2nd ed., Prentice-Hall Inc., 389 (1986)

[10] Takaiki, TAKAIOSU GASU, 13(4), 153 (1976)

[11] Walas SM, "Phase Equilibria in Chemical Engineering," Butter-worth Publishers, 329 (1985)