Liquid film flow and area generation in structured packed columns

Nicolaiewsky, E. M. A.; Tavares, Frederico W.; Rajagopal, Krishnaswamy; Fair, James R.

doi:10.1016/s0032-5910(99)00029-7

Cited by 33 publications

(36 citation statements)

References 24 publications

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“…M250X had steeper flow channels (60 ) than M250Y (45 ), but otherwise was geometrically equivalent. Its measured area appears to be lower than M250Y but by less than 5% -insufficient to be distinguished from the experimental noise.…”

Section: Effect Of Corrugation Angle (M250y/m250x) and Element Interfmentioning

confidence: 99%

“…34,48 High-capacity packings have been introduced to counteract this problem. 49,50 The idea is to bend the sheets near the joint from the standard 45 inclination to a vertical (90 ) orientation to facilitate a smoother flow transition. The packing used in this work (MP252Y) resembled M250Y except for this modification, which occurred at the top/bottom 1.…”

Section: Effect Of Corrugation Angle (M250y/m250x) and Element Interfmentioning

confidence: 99%

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A dimensionless model for predicting the mass‐transfer area of structured packing

et al. 2011

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The mass-transfer area of nine structured packings was measured in a 0.427 m ID column via absorption of CO 2 from air into 0.1 kmol/m 3 NaOH. The mass-transfer area was most strongly related to the specific area (125-500 m Áh). Surface tension (30-72 mN/m) had a weaker but significant effect. Gas velocity (0.6-2.3 m/s), liquid viscosity (1-15 mPaÁs), and flow channel configuration had essentially no impact on the mass-transfer area. Surface texture (embossing) increased the effective area by 10% at most. The ratio of mass-transfer area to specific area (a e /a p ) was correlated within the limits of AE13% for the entire experimental database a e a p ¼ 1:34

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Section: Effect Of Corrugation Angle (M250y/m250x) and Element Interfmentioning

confidence: 99%

Section: Effect Of Corrugation Angle (M250y/m250x) and Element Interfmentioning

confidence: 99%

A dimensionless model for predicting the mass‐transfer area of structured packing

et al. 2011

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“…Since it is very difficult to carry out experimental studies inside packed columns, numerous researchers pay attention to a single inclined plate (Ghiaasiaan et al, 1997;Johnso, 1999;Karimi and Kawaji, 2000;Nicolaiewsky, 1999;Saber and El-Genk, 2004;Takahama and Kato, 1980;Zapke and Kröger, 2000). Some qualitative and quantitative conclusions were drawn by the experimental observation and analysis.…”

Section: Introductionmentioning

confidence: 99%

CFD Study on Liquid Flow Behavior on Inclined Flat Plate Focusing on Effect of Flow Rate

Yuan

Repke

et al. 2012

Engineering Applications of Computational Fluid Mechanics

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ABSTRACT:The factors affecting the separation efficiencies of structured packed columns are multi-scale, including the macroscopic variables (eg feed rate, pressure and temperature) and the microscopic liquid flow behavior and distribution. Especially in the situation in which the second liquid phase is inevitable within distillation columns, the microscopic liquid flow behavior could lead to the uncertainty of the separation efficiencies. This work mainly focuses on the investigation of the local flow behavior of a liquid phase flowing on an inclined steel plate at different situations. On one hand, a three-dimensional CFD model based on the VOF model is developed with the commercial CFD package, FLUENT 6.3. On the other hand, the results of the experimental study are adopted to validate partially the model. Within the developed model, the influences of the liquid and gas flow rates are studied with respect to the specific wetted area, the thickness profile of film and rivulet flows as well as the average velocity of the liquid phase.

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“…The geometrical characteristics of the regular packing, the physical properties of liquid and packing material, and other factors affect the liquid distribution inside the column, and this has been the subject of other studies. 5,[9][10][11][12][13][14] Experimental data on the effect of the operation parameters on the pressure drop, mass transfer efficiency, and distribution of the local flow parameters in a distillation column with a 0.9-m diameter and a regular aluminum Koch 1Y packing are shown in Pavlenko et al 12,13 It is shown by Nicolaiewsky et al 14 and Nicolaiewsky and Fair 15 that for the vertical plane sheets a decrease in surface tension and contact angle improves liquid spreading and surface wetting both for standard and corrugated sheets. The surface texture and roughness of a sheet also improve its wetting at the expense of contact angle reduction.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of liquid distribution over structured packing

Алексеенко¹,

Маркович²,

Evseev³

et al. 2008

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).The thickness of a liquid film on the structured packing inside a distillation column was measured at the region of counter-current flow of gas and liquid by fiber-optic sensors. The local distribution of liquid inside a typical geometrical cell formed by the corrugated Koch 1Y sheets was examined in this study. It is shown that, in the vicinity of the sheet contact points inside the cell, the liquid film thickness is maximal, and peculiar meniscuses are formed where liquid flow redistribution over the corrugation surface occurs. A counter gas flow decreases pulsations of the liquid film thickness by a factor of 1.5-2 on the rib and lateral surfaces of corrugation. Experimental data on the effect of operation parameters on the local distribution of liquid in the cell and the pressure drop in the column are presented.

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Liquid film flow and area generation in structured packed columns

Cited by 33 publications

References 24 publications

A dimensionless model for predicting the mass‐transfer area of structured packing

A dimensionless model for predicting the mass‐transfer area of structured packing

CFD Study on Liquid Flow Behavior on Inclined Flat Plate Focusing on Effect of Flow Rate

Experimental investigation of liquid distribution over structured packing

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