Absorption of SO2 in hollow fiber membrane contactors using various aqueous absorbents

Lee, Hyung-Keun; Jo, Hang-Dae; Choi, Won-Kil; Park, Hyun-Hee; Lim, Chun-Won; Lee, Yong Taek

doi:10.1016/j.desal.2006.03.435

Cited by 28 publications

(12 citation statements)

References 3 publications

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“…Since then, large numbers of researches on the membrane absorption process have been done (6)(7)(8)(9)(10)(11)(12)(13)(14). In the membrane absorption process, micro-porous membranes are applied.…”

Section: Effect Of Membrane Structural Characteristics On Mass Transfmentioning

confidence: 99%

Effect of Membrane Structural Characteristics on Mass Transfer in a Membrane Absorption Process

Zhang

Chen

Sun

et al. 2010

Separation Science and Technology

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Carbon dioxide is absorbed by de-ionized water or NaOH aqueous solution in the unsteady-state membrane absorption process. A theoretical model has been developed to describe the mass transfer behavior in the liquid phase, in which the effects of membrane structural characteristics are investigated. The concentration profiles in the liquid phase are calculated as a function of time. When the membrane porosity is relatively high or the pore size is relatively small, the solute concentration profile near the membrane surface can get homogeneous instantly due to the short distance between adjacent pores. In this case, the existence of the porous membrane has less effect on the mass transfer process. However, when the membrane porosity is relatively low or the pore size is relatively large, the distance between the adjacent pores is large, so the concentration profile near the membrane surface is hard to get homogeneous during the absorption process. Therefore, the concentration profile can be influenced significantly by the membrane structural characteristics, which means that the membrane structure has a significant effect on the mass transfer in liquid phase. Moreover, the chemical reaction in the liquid phase makes it difficult for the concentration profile near the membrane surface to get homogeneous. The disturbance in the liquid phase caused by the gas flow and pressure fluctuation is also taken into account in the model, and the model results agree well with the experimental data.

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Section: Effect Of Membrane Structural Characteristics On Mass Transfmentioning

confidence: 99%

Effect of Membrane Structural Characteristics on Mass Transfer in a Membrane Absorption Process

Zhang

Chen

Sun

et al. 2010

Separation Science and Technology

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show abstract

“…Lee et al [35] obtained SO 2 removal efficiencies and mass transfer coefficients in the hollow fiber membrane contactors at various gas and liquid flow rates. Recently, some researches have been done on the removal of H 2 S from gas streams by membrane contactors [38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

“…Although most of the researches are focused on the carbon dioxide removal, some others were conducted on removal of the other acid gases [35][36][37][38][39][40][41][42]. Lee et al [35] obtained SO 2 removal efficiencies and mass transfer coefficients in the hollow fiber membrane contactors at various gas and liquid flow rates.…”

Section: Introductionmentioning

confidence: 99%

Hollow fiber gas–liquid membrane contactors for acid gas capture: A review

Mansourizadeh

Ismail

2009

Journal of Hazardous Materials

332

161

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“…In a membrane dialysis system, the feed solution (defined as the retentate phase) and the receiving solution (defined as the dialysate phase) are usually composed of the same solvent and consequently, it is impossible to avoid the transport of the solvent across the membrane because of the pressure gradient in the two phases. This mechanism of operation is different from other methods involving membrane contactors, e.g., solvent extraction [2][3][4], gas absorption [5][6][7], ion exchange [8,9] and membrane distillation [10,11]. The early applications of membrane dialysis include Donnan dialysis [12] and alcohol reduction of beverages [13].…”

Section: Introductionmentioning

confidence: 99%

Two‐Dimensional Mass‐Transfer Model of a Flat‐Plate Dialyzer with Ultrafiltration Operation

2010

Chem Eng & Technol

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A two-dimensional theoretical model of a flat-plate dialyzer with ultrafiltration operation was developed in this study. The two-dimensional velocity profile of the fluid and the concentration distribution in the membrane of the dialysis system with ultrafiltration operation were also derived. The Crank-Nicolson method was used to numerically solve the two-dimensional theoretical model. The influences of the retentate phase flow rate, dialysate phase flow rate, ultrafiltration flow rate and channel thickness ratio on the concentration distribution and the mass transfer rate were illustrated. A considerable mass-transfer efficiency improvement was obtained by employing the flat-plate dialyzer with ultrafiltration operation in comparison to the pure dialysis system without ultrafiltration operation. An experiment involving urea separation by the flat-plate dialyzer with ultrafiltration operation was also performed to confirm the accuracy of the proposed mathematical model.

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Absorption of SO2 in hollow fiber membrane contactors using various aqueous absorbents

Cited by 28 publications

References 3 publications

Effect of Membrane Structural Characteristics on Mass Transfer in a Membrane Absorption Process

Effect of Membrane Structural Characteristics on Mass Transfer in a Membrane Absorption Process

Hollow fiber gas–liquid membrane contactors for acid gas capture: A review

Two‐Dimensional Mass‐Transfer Model of a Flat‐Plate Dialyzer with Ultrafiltration Operation

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