Hydrodynamics of co-current downward liquid-liquid system with packing

Swaminathan Samdavid; Thiruvengadam Renganathan; Kamatam Krishnaiah

Korean Journal of Chemical Engineering, Vol.39, No.1, 86-95, January, 2022

DOI10.1007/s11814-021-0950-x Export Citation

Hydrodynamics of co-current downward liquid-liquid system with packing

Swaminathan Samdavid^{1, 2}, Thiruvengadam Renganathan^{1, †}, and Kamatam Krishnaiah^{1, 3}

¹Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600 036, India
²Present address: Department of Chemical Engineering, SRM Institute of Science and Technology, Chengalpattu - 603203, India
³Present address: Department of Chemical Engineering, Indian Institute of Technology Tirupati, Tirupati 517 506, India

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The effect of packing and its voidage on the hydrodynamic characteristics of co-current downward liquidliquid system (CCDLLS) was studied using water and three different oils (exxsol, kerosene and white oil). Two flow regimes, homogeneously dispersed oil regime and heterogeneously dispersed oil, were observed with the total pressure drop showing a minimum at the regime transition velocity. Depending on the packing, frictional pressure drop either shows a minimum or monotonically increases with water velocity. Low-density oil results in higher holdup and correspondingly higher frictional pressure drop. Higher dispersed phase holdup is obtained by using a low voidage packing. Semi-empirical/empirical equations are proposed to predict the frictional pressure drop and phase holdup.

Keywords:Liquid-liquid Flow;Co-current Downward;Packed Bed;Hydrodynamics;Pressure Drop

[References]

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Samdavid S, Renganathan T, Krishnaiah K, RSC Adv., 6, 12439 (2016)
Samdavid S, Cocurrent downward liquid-liquid system: Hydrodynamics and mixing characteristics, Ph.D. thesis, IIT Madras (2017).
Sallaly M, Reynier JP, Che. Eng. Sci., 25, 1709 (1970)
Motil BJ, Balakotaiah V, Kamotani Y, AIChE J., 49(3), 557 (2003)

[1] Babu PSKC, Kundu G, Mukherjee D, Indian J. Chem. Technol., 6(5), 243 (1999)

[2] Liu L, Matar O, Lawrence J, Hewitt G, Che. Eng. Sci., 61, 4007 (2006)

[3] Hu B, Angeli P, Can. J. Chem. Eng., 84(1), 94 (2006)

[4] Ghosh S, Das G, Das PK, J. Fluids Eng., 133, 011202 (2011)

[5] Samdavid S, Renganathan T, Krishnaiah K, RSC Adv., 6, 12439 (2016)

[6] Samdavid S, Cocurrent downward liquid-liquid system: Hydrodynamics and mixing characteristics, Ph.D. thesis, IIT Madras (2017).

[7] Sallaly M, Reynier JP, Che. Eng. Sci., 25, 1709 (1970)

[8] Motil BJ, Balakotaiah V, Kamotani Y, AIChE J., 49(3), 557 (2003)