Dynamic simulation of agitated liquid—liquid dispersions—II. Experimental determination of breakage and coalescence rates in a stirred tank

Laso, Manuel; Steiner, L.; Hartland, S.

doi:10.1016/0009-2509(87)80117-3

Cited by 55 publications

(48 citation statements)

References 9 publications

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“…Some of these studies are summarized in Table 1. Majority of them (Vermeulen et al, 1955;Rodger et al, 1956;Weinstein and Treybal, 1973;Mlynek and Resnick, 1972;Fernandes and Sharma, 1967;Brown and Pitt, 1974;McManamey, 1978;Calabrese et al, 1986a,b;Wang and Calabrese 1986;Nishikaw et al, 1987a,b;Laso et al, 1987;Chatzi et al, 1991;Zhou and Kresta, 1998;Pacek et al, 1999;Ruiz et al, 2002;Desnoyer et al, 2003;Giapos et al, 2005;Sechremeli et al, 2006) have been done on batch vessels. Only few of them have been done on continuous flow stirred tanks (Wienstein and Treybal, 1973;Fernandes and Sharma, 1967;Quadros and Baptista, 2003).…”

Section: Literature Reviewmentioning

confidence: 99%

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Representative drop sizes and drop size distributions in A/O dispersions in continuous flow stirred tank

et al. 2008

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Section: Literature Reviewmentioning

confidence: 99%

“…T 0 is the reference tank diameter equal to 25 cm. Laso et al (1987) Dispersed phase was a mixture of CCl 4 with n-heptane or 1-octanol or MIBK. Continuous phase was water.…”

Section: Nishikawa Et Al (1987a)mentioning

confidence: 99%

Representative drop sizes and drop size distributions in A/O dispersions in continuous flow stirred tank

et al. 2008

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“…Note that most of the correlations were developed for stirred vessels and not for extraction columns (e.g. Coulaloglou & Tavlarides [11] and Laso [52]. So, the parameters in these correlations have to be refitted (for a given case) to match the experimental data.…”

Section: Mass-transfermentioning

confidence: 99%

“…So, the parameters in these correlations have to be refitted (for a given case) to match the experimental data. The correlations from Laso et al [52] and Narsimhan and Ramkrishna [53] are strictly empirical, whereas the models from Coulaloglou and Tavlarides [11] and Tsouris and Tavlarides [64] are derived according to a phenomenological base. The correlation parameters for breakage frequency correlations employed in RDC and Kühni columns are given in Table A5.…”

Section: Mass-transfermentioning

confidence: 99%

“…(A17)). The models: Coulaloglou & Tavlarides [11], Sovova [51], Tsouris & Tavlarides [64] are developed based on a phenomenological approach and the model of Laso et al [52] is strictly empirical. The phenomenological models are based on the film drainage theory using the statistic collision rate and the coalescence efficiency:…”

Section: The Coalescence Frequencymentioning

confidence: 99%

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LLECMOD: A Bivariate Population Balance Simulation Tool for Liquid- Liquid Extraction Columns

Attarakih¹,

Bart²,

Steinmetz³

et al. 2008

TOCENGJ

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Abstract:The population balance equation finds many applications in modelling poly-dispersed systems arising in many engineering applications such as aerosols dynamics, crystallization, precipitation, granulation, liquid-liquid, gas-liquid, combustion processes and microbial systems. The population balance lays down a modern approach for modelling the complex discrete behaviour of such systems. Due to the industrial importance of liquid-liquid extraction columns for the separation of many chemicals that are not amenable for separation by distillation, a Windows based program called LLECMOD is developed. Due to the multivariate nature of the population of droplets in liquid -liquid extraction columns (with respect to size and solute concentration), a spatially distributed population balance equation is developed. The basis of LLECMOD depends on modern numerical algorithms that couples the computational fluid dynamics and population balances. To avoid the solution of the momentum balance equations (for the continuous and discrete phases), experimental correlations are used for the estimation of the turbulent energy dissipation and the slip velocities of the moving droplets along with interaction frequencies of breakage and coalescence. The design of LLECMOD is flexible in such a way that allows the user to define droplet terminal velocity, energy dissipation, axial dispersion, breakage and coalescence frequencies and the other internal geometrical details of the column. The user input dialog makes the LLECMOD a user-friendly program that enables the user to select the simulation parameters and functions easily. The program is reinforced by a parameter estimation package for the droplet coalescence models. The scale-up and simulation of agitated extraction columns based on the populations balanced model leads to the main application of the simulation tool.

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Measurements of particle‐size distribution during suspension polymerization

1999

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Dynamic simulation of agitated liquid—liquid dispersions—II. Experimental determination of breakage and coalescence rates in a stirred tank

Cited by 55 publications

References 9 publications

Representative drop sizes and drop size distributions in A/O dispersions in continuous flow stirred tank

Representative drop sizes and drop size distributions in A/O dispersions in continuous flow stirred tank

LLECMOD: A Bivariate Population Balance Simulation Tool for Liquid- Liquid Extraction Columns

Measurements of particle‐size distribution during suspension polymerization

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