Modeling the absorption of SO2 in a spray scrubber using the penetration theory

Brogren, Charlotte; Karlsson, Hans T.

doi:10.1016/s0009-2509(97)00126-7

Cited by 155 publications

(99 citation statements)

References 24 publications

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“…However, countercurrent spray contactors are the most commonly used (Brogren and Karlsson, 1997). Spray towers were developed for limestone slurry scrubbing by Chemico, and the first commercial unit was installed in the Texas Utilities Monticello plant (Hewittand Saleem, 1980).…”

Section: 484 (678)mentioning

confidence: 99%

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Liquid‐phase mass transfer in spray contactors

Yeh

Rochelle

2003

AIChE Journal

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The liquid‐phase mass transfer in sprays has been measured with carbon dioxide desorption by collecting and analyzing samples of the spray. Experiments were conducted with laboratory‐ (0.009 to 0.13 L/s) and pilot‐scale (6.4 to 12.8 L/s) centrifugal hollow‐cone spray nozzles at pressure drops from 34 kPa to 138 kPa. Significant mass transfer occurred during sample collection, and a quench sampling method was developed to minimize this effect. The number of liquid‐phase transfer units (NL) due to spray impact onto walls and liquid pools was often as much as the spray NL. Approximately 60% of the spray NL occurs in the liquid sheet before droplet formation, and the droplet region can account for less than half of the total NL of the spray.

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Section: 484 (678)mentioning

confidence: 99%

“…Examples include the work of Noblett et al (1995), Agarwal (1995, Brogren andKarlsson (1997), andDeVincentis (1998). However, in these models, the liquid mass transfer coefficient usually must be provided or assumed, and the simulations are used to study the effect of other parameters on SO 2 removal.…”

Section: Limestone Slurry Scrubbingmentioning

confidence: 99%

Liquid‐phase mass transfer in spray contactors

Yeh

Rochelle

2003

AIChE Journal

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“…The presence of a chemical component in the liquid phase which reacts with the absorbed component enables a considerable enhancement of the mass transfer rate. One of the most studied case is the scrubbing of sulfur dioxide (SO 2 ) by a limestone slurry in a counter current spray scrubber, used in order to reduce the emissions [1,2,3,4]. A deep understanding of the phenomena taking place during the gas-droplet mass transfer coupled with chemical reaction is of fundamental interest for the design and the optimization of such industrial applications.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, the expression for the Sherwood number derived by Frössling from a study of the evaporation of small water droplet (see [5]) was often used for gas absorption into a droplet. More recently, Brogren and Karlsson [1] have proposed a model for the flue gas desulfurization taking into account all the chemical reactions taking place in the liquid but using the Higbie penetration theory [6] for the mass transport.…”

Section: Introductionmentioning

confidence: 99%

Gas absorption into a spherical liquid droplet: Numerical and theoretical study

Wylock¹,

Colinet²,

Haut³

2012

Chemical Engineering Journal

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This work deals with the modeling and the direct numerical simulation of the absorption of a gas component into a spherical liquid droplet in free fall, where the absorbed component takes part to a chemical reaction. This study is realized by computing the flow fields and the concentration fields simultaneously in the gas and liquid phases. The time evolution of the droplet global mass absorption rate is studied for various regimes characterized by the Reynolds and the Hatta numbers. The monitoring of the time evolution of the concentration fields in the droplet enables the understanding of the interactions between the diffusive and convective mass transports and the chemical reaction. The phenomena controlling the mass transfer rate and how they evolve during the mass absorption process can then be identified. In a first stage, the case of the physical absorption is studied. Moreover, analytical expressions are developed to correlate the time evolution of the Sherwood number with the Reynolds number and the absorption time. In a second stage, the influence of the coupling with a chemical reaction is studied. It is observed that several rate-limiting mechanisms successively control the global absorption rate, enlightening the complex interactions between convective and diffusive mass transport and the chemical reaction.

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“…Several models available for absorption of SO 2 are based on lime/limestone slurry [4,5]. Some models are also available in literature regarding the absorption of SO 2 in sea water [6,7].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of Wet Magnesia Flue Gas Desulphurization Process

Mondal

2008

Modelling and Simulation in Engineering

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Desulphurization of flue gases from various chemical industries in a techno-econo-enviro manner is a demanding technology.The concentrations of sulphur dioxide in and around these plants overshoot the danger point. In recent years, the process analysis of chemical absorption in a slurry has become important in rational design and development of wet scrubbing processes for the removal of SO 2 from flue gases. The elementary steps encountered in wet scrubbing by slurries are diffusion and reaction of gaseous species and solid dissolution in liquid film. In the present work, the process of the absorption of sulphur dioxide into wet magnesia slurry was theoretically analyzed according to the two-reaction plane model incorporating the solid dissolution promoted by the reactions with absorbed sulphur dioxide in the liquid film. A model based on Fick's second law has been developed to calculate enhancement factor for absorption of Sulphur dioxide into Mg(OH) 2 slurry. The concentration of accumulated species in the bulk of the liquid phase (sulphite ions for this case) which substantially control the absorption rates was included in the model for the prediction of theoretical enhancement factor. The values of theoretical enhancement factors obtained from model were compared with experimental enhancement factors available in literature. The model values of enhancement factors agreed well with the values of experimental enhancement factor available in literature.

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Modeling the absorption of SO2 in a spray scrubber using the penetration theory

Cited by 155 publications

References 24 publications

Liquid‐phase mass transfer in spray contactors

Liquid‐phase mass transfer in spray contactors

Gas absorption into a spherical liquid droplet: Numerical and theoretical study

Mathematical Modeling of Wet Magnesia Flue Gas Desulphurization Process

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