Experiments of hydrodynamic and gas liquid mass transfer were carried out in a bubble column of 19.4 cm internal diameter and of 4m height. The liquid phase can be either tap water or a coalescence inhibitor system, using aqueous solutions of three alcohols (ethanol, 2-propanol and 1-butanol) with a volumetric concentration of 0.05% v/v and sodium dodecyl sulfate: SDS (10?3mol/L) as an anionic surfactant. The hydrodynamic study involved placing wall pressure sensors in different axial positions of a bubble column to determine the gas hold-up in different regions and the influence of non-coalescing system on its evolution. The overall liquid movement induced by bubbles and the residence time distribution analysis of liquid phase was performed by using inductivity sensors. Gas hold-up results showed that the presence of the gas is more important in the zone far enough to the gas distributor (zone II). The results of the volumetric mass transfer coefficient (KLa) revealed that KLa decreased with the addition of alcohol, especially when the number of carbons in alcohol increased. KLa decreased more with the addition of anionic surfactant. It was also proven that a decrease in KLa was due to a decrease in KL, which was due to a decrease of bubble rise velocity as well as of the diffusivity when alcohol or ionic surfactant was added. Correlations were developed linking gas holdup and gas-liquid mass transfer coefficient to superficial gas velocity and surface tension gradient.

Gas Hold-up Correlations KLa Correlations RTD Semi Pilot Bubble Column Coalescence-inhibiting System Gas - Liquid Mass Transfer

Azizi F, Al Taweel AM, Chem. Eng. Sci., 62(24), 7436 (2007)
Magolan B, Lubchenko N, Baglietto E, Chem. Eng. Sci.: X, 2, 100009 (2019)
Chisti MY, Airlift bioreactors, Elsevier, New York (1989).
Camarasa E, Vial C, Poncin S, Wild G, Midoux N, Bouillard J, Chem. Eng. Process., 60, 329 (1999)
Vial C, Camarasa E, Poncin S, Wild G, Midoux N, Bouillard J, Chem. Eng. Sci., 55(15), 2957 (2000)
Jin HB, Yang SH, He GX, Guo ZW, Tong ZM, Chem. Eng. Sci., 60(22), 5955 (2005)
Erfani A, Khosharay S, Aichele CP, J. Chem. Thermodyn., 135, 241 (2019)
Cachaza EM, Diaz ME, Montes FJ, Galan MA, Chem. Eng. Sci., 66(18), 4047 (2011)
Guido G, Pellegrini LA, Chem. Eng. Res. Des., 124, 283 (2017)
Besagni G, Inzoli F, Chem. Eng. Sci., 170, 270 (2017)
Vandu CO, Krishna R, Chem. Eng. Process., 43(8), 987 (2004)
Miron AS, Camacho FG, Gomez AC, Grima EM, Chisti Y, AIChE J., 46(9), 1872 (2000)
Gourich B, Vial C, Essadki AH, Allam F, Soulami MB, Ziyad M, Chem. Eng. Process., 45(3), 214 (2006)
Martin M, Montes FJ, Galan MA, Chem. Eng. J., 128(1), 21 (2007)
Orhan R, Dursun G, Chem. Eng. Res. Des., 109, 477 (2016)
Kovats P, Thevenin D, Zahringer K, Int. J. Multiphase Flow, 123, 103174 (2020)
Shu SL, Vidal D, Bertrand F, Chaouki J, Renew. Energy, 141, 613 (2019)
Dolenko TA, Burikov SA, Dolenko SA, Efitorov AO, Plastinin IV, Yuzhakov VI, Patsaeva SV, J. Phys. Chem. A, 119, 10806 (2015)
Guo KY, Wang TF, Yang GY, Wang JF, J. Chem. Technol. Biotechnol., 92(2), 432 (2017)
Syeda SR, Afacan A, Chuang KT, Can. J. Chem. Eng., 80(1), 44 (2002)
Rosso D, Huo DL, Stenstrom MK, Chem. Eng. Sci., 61(16), 5500 (2006)
Alves SS, Orvalho SP, Vasconcelos JMT, Chem. Eng. Sci., 60(1), 1 (2005)
Solsvik J, Jakobsen HA, J. Dispersion Sci. Technol., 35, 1626 (2014)
Oolman TO, Blanch HW, Chem. Eng. Commun., 43, 237 (1986)
Zahradnik J, Fialova M, Linek V, Chem. Eng. Sci., 54(21), 4757 (1999)
Fujimoto T, Sanyo Chemical Industries Ltd., Kyoto (Japan) (1985).
Vasconcelos JMT, Orvalho SP, Alves SS, Am. Inst. Chem. Engineers J., 48, 1145 (2002)
Boussinesq J, Annales de Chimie et de Physique, 29, 364 (1913)
Garner FH, Hammerton D, Chem. Eng. Sci., 3, 1 (1954)
Dukhin SS, Kovalchuk VI, Gochev GG, Lotfi M, Krzan M, Malysa K, Miller R, Adv. Colloid Interface Sci., 222, 260 (2015)
Syeda SR, Reza MJ, Chem. Eng. Res. Des., 89(12A), 2552 (2011)
Khoshray S, Talebi M, Akbari TS, Salehi ST, J. Mol. Liq., 249, 245 (2018)
Torn RD, Nathanson GM, J. Phys. Chem. B, 106(33), 8064 (2002)
Biscay F, Ghoufi A, Malfreyt P, J. Chem. Phys., 134, 044709 (2011)
Albijanic B, Chatterjee S, Subasinghe N, Asad MWA, Chem. Eng. Res. Des., 113, 241 (2016)
Zahradnik J, Fialova M, Chem. Eng. Sci., 51(10), 2491 (1996)
Zahradnik J, Fialova M, Ruzicka M, Drahos J, Kastanek F, Thomas NH, Chem. Eng. Sci., 52(21-22), 3811 (1997)
Levenspiel O, Chemical reaction engineering, Third Ed. John Wiley & Sons, New York (1999).
Essadki AH, Gourich B, Vial C, Delmas H, Chem. Eng. Sci., 66(14), 3125 (2011)
Stenstrom MK, Gilbert RG, Wat. Res., 15(6), 643 (1981)
Jamnongwong M, Loubiere K, Dietrich N, Hebrard G, Chem. Eng. J., 165(3), 758 (2010)
Frossling N, Gerlands Beitage zur Geophysik, 52, 170 (1938)
Maceiras R, Santana R, Alves SS, Chem. Eng. Sci., 62(23), 6747 (2007)
Griffith RM, Chem. Eng. Sci., 17, 1057 (1962)
Gourich B, Vial C, El Azher N, Soulami MB, Ziyad M, Biochem. Eng. J., 39, 1 (2008)
Han L, Al-Dahhan MH, Chem. Eng. Sci., 62(1-2), 131 (2007)
Zednikova M, Orvalho S, Fialova M, Ruzicka M, Chem. Eng., 2, 19 (2018)
Asgharpour M, Mehrnia MR, Mostoufi N, Biochem. Eng. J., 49, 351 (2010)