Comparison of methods for measuring interfacial areas in gas‐liquid dispersions

Landau, J.; Boyle, J.; Gomaa, Hassan; Al‐Taweel, Areej Mohammad

doi:10.1002/cjce.5450550104

Cited by 33 publications

(22 citation statements)

References 12 publications

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“…The chemical method is applicable to all flow regimes and is apparently the only method which does not require verification by another measurement technique (Landau et al, 1977). One of the main drawbacks at present of all but the last method is the restriction to one or two flow regimes, namely bubbly and/or slug.…”

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confidence: 99%

Investigation of interfacial area and void fraction in upward, cocurrent gas‐liquid flow

DeJesus

Kawaji

1990

Can J Chem Eng

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Interfacial area was measured in cocurrent, gas-liquid upward flow through a vertical, 2.54 cm I.D. and 2.67 m long tube by absorption of CO, diluted in air into aqueous sodium hydroxide solution. Void fraction and pressure drop were also measured for superficial liquid velocities up to 1.3 m/s. Although the interfacial area exhibited a maximum and minimum with increasing superficial gas velocities at relatively high liquid flow rates as in previous experiments, several significant differences were found. Since the dissipation parameters proposed in the past to correlate interfacial area were found to be less than satisfactory, a new empirical relation is proposed, which can correlate most of the present data within f 20%.On a mcsurk la surface intcrfaciale en Ccoulement ascendant gaz-liquide b cocourant dans un tube de 234 cm de diambre intCrieur et de 2,67 m de long, par absorption de CO, diluk dans l'air dans une solution d'hydroxyde de sodium aqueux. On a Cgalement mesure la fraction de vide et la perte de charge pour des vitesses liquides superficielles allant jusqu'k 1.3 m/s. Bien que la surface interfaciale montre un maximum et un minimum avec l'accroissement des vitesses de gaz superficielles a des dCbits liquides relativement Clevis, plusieurs differences importantes ont CtC remarquCes. I x s paramktres de dissipation proposks dans le pass6 pour la corrdation de la surface interfaciale s'etant avCres insatisfaisants, on propose une nouvelle relation enipirique, capable de corrkler la plupart des donnCes actuelles avec une erreur infkrieure a 20%.

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Investigation of interfacial area and void fraction in upward, cocurrent gas‐liquid flow

DeJesus

Kawaji

1990

Can J Chem Eng

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“…Whereas the light attenuation technique yields an average value representative of the conditions across its path length, the photographic technique emphasizes the regions near the wall (Landau et al, 1977 b). This may well explain the small but systematic deviation between the two techniques which was observed to occur in the bubble column when gas holdups larger than 5 % were obtained using large bubbles (Q2 1 2.0 mm, Figure 5).…”

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confidence: 99%

An improved light attenuation technique for measuring large interfacial areas

Kasireddy

Al‐Taweel

1990

Can J Chem Eng

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A laser-based light attenuation technique was successfully used to measure interfacial areas as high as 5832 m2/m3 and Sauter mean bubble diameter varying between 50 and 5600 pm. Good agreement between this approach and the photographic technique was obtained particularly at low gas holdups.On a utilisC avec sucds une technique d'attknuation de la lumibre bade sur le laser afin de mesurer des surfaces interfaciales atteignant 5832 m2/m3 et le diamttre des bulles moyen de Sauter variant entre 50 et 5600 pm. Un bon accord a Ctt obtenu entre cette approche et la technique photographique particulibrement h de faibles rktentions de gaz.

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“…For the measurement of S in gas liquid reactions, commonly used methods include light scattering techniques and chemical methods. The light scattering method can be used in systems where gas is in the dispersed phase [35,46,70,71]. In the chemical method, a gas liquid reaction system with known kinetics is considered [72].…”

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confidence: 99%

A Review on Gas‐Liquid Reactions in Light Oil Sweetening: Kinetics and Reactor Design Aspects

et al. 2014

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Thiols in liquefied petroleum gas are undesirable due to their foul odor and corrosive nature. The process of removing these thiols is termed as sweetening. Metal phthalocyanines are reported to be the most effective sweetening catalyst. However, the solubility of metal phthalocyanine is low in aqueous medium. Thus, in an effort to further improve upon the existing catalysts, a novel cobalt phthalocyanine sulfonamide catalyst was developed. Laboratory and commercial evaluation of this catalyst showed enhanced activity as compared to a commercial catalyst with comparable stability. With proven higher activity, comparable stability, design of grass root oxidizer using this catalyst is the next step. Design of oxidizers for an extractive sweetening process based on this catalyst in grass root refineries requires a rigorous kinetic model. The paper reviews the literature on sweetening kinetics and focuses on the concepts of design of laboratory reactors for reaction kinetics studies for such gas-liquid reactions. Laboratory reactor systems can be useful for accurate estimation of kinetic parameters which can then be used to design industrial reactors and predict their performance.

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Comparison of methods for measuring interfacial areas in gas‐liquid dispersions

Cited by 33 publications

References 12 publications

Investigation of interfacial area and void fraction in upward, cocurrent gas‐liquid flow

Investigation of interfacial area and void fraction in upward, cocurrent gas‐liquid flow

An improved light attenuation technique for measuring large interfacial areas

A Review on Gas‐Liquid Reactions in Light Oil Sweetening: Kinetics and Reactor Design Aspects

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