Influence of Surface Tension on Effective Packing Area

Tsai, Robert E.; Schultheiss, Peter; Kettner, Andreas Martin; Lewis, J. Christopher; Seibert, A. Frank; Eldridge, R. Bruce; Rochelle, Gary T.

doi:10.1021/ie070780l

Cited by 62 publications

(51 citation statements)

References 21 publications

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“…It should be recognized that Tsai et al 15 presented masstransfer area data for M250Y and M500Y, and concluded that a reduction in surface tension (35 mN/m) from the base case (72 mN/m) had no impact on M250Y and a dramatic effect (50%) on M500Y. Improvements to the experimental setup since then (see Tsai 16 ) could explain the discrepancy between the more recent data and this previous report.…”

Section: Effect Of Surface Tension (M250y/m500y/p500)contrasting

confidence: 51%

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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 Surface Tension (M250y/m500y/p500)contrasting

confidence: 51%

“…Additional details about the experimental system are in Tsai et al 15 and a complete procedural description can be found in Tsai. 16 …”

Section: Packed Columnmentioning

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 details of the experimental protocol and the methods of analysis are presented elsewhere. 50,74 The Danckwerts plot technique 75 simultaneously yields k L and a m from mass-transfer experiments. From the measurements of the gas absorption rate at different apparent firstorder reaction rate constants, the values of k L and a m can be determined using the Danckwerts surface renewal model.…”

Section: Implications: Mass-transfer Areamentioning

confidence: 99%

New mass‐transfer correlations for packed towers

2011

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in Wiley Online Library (wileyonlinelibrary.com).Rate-based calculations for trayed and packed columns offer process engineers a more rigorous and reliable basis for assessing column performance than the traditional equilibrium-stage approach, especially for multicomponent separations. Although the mathematics, thermodynamics, and transport-related physics upon which nonequilibrium separations theory is founded are generally true, it is also true that rate-based simulations today suffer from a serious weakness-they are ultimately tied to underlying equipment performance correlations with questionable predictive capability. In the case of packed columns operated countercurrently, correlations are required for the masstransfer coefficients, k x and k y , for the specific area participating in mass transfer, a m , for the two-phase pressure drop, (Dp/Z) 2/ , and for the flood capacity of the column. In particular, it is generally well known that packing mass-transfer correlations available in the public domain are unreliable when they are applied to chemical systems and column operating conditions outside of those used to develop the correlations in the first place. For that reason, we undertake the development of dependable, dimensionally consistent, correlating expressions for the mass-transfer-related quantities k x , k y , and a m for metal Pall rings, metal IMTP, sheet metal structured packings of the MELLAPAK type, and metal gauze structured packings in the X configuration, using a new data fitting procedure. We demonstrate the superior performance of these correlations for a wide range of chemical systems and column operating conditions, including distillations as well as acid gas capture with amines. Further, we show that these new correlations lead to predictions for the relative interfacial area participating in mass transfer that can be greatly in excess of the geometrical surface area of the packing itself.

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“…Superficial gas velocity, V SG , is 1.5 m/s corresponding to a F-Factor, F S , of 1.6 Pa 0.5 . Tsai et al (2008Tsai et al ( , 2011 and Tsai (2010) Spiegel and Meier (1992) (Spiegel and Meier, 1992) with respect to its validity at high liquid loads and compare their model with other previous published work.…”

Section: Litterature Reviewmentioning

confidence: 99%

Pressure Drop, Capacity and Mass Transfer Area Requirements for Post-Combustion Carbon Capture by Solvents

Lassauce

Alix

Raynal

et al. 2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Re´sume´-Pertes de charge, capacite´et aires de transfert de matie`re requises pour le captage du CO 2 en post-combustion par solvants -Les proce´de´s de captage en post-combustion utilisant des amines sont conside´re´s comme l'une des options pre´fe´re´es pour le captage et le stockage du CO 2 (CSC, CO 2 Capture and Storage). Cependant, le couˆt du CO 2 e´vite´est tre`s important et doit eˆtre re´duit. Ce couˆt est fortement lie´aux designs des colonnes, qui doivent, par conse´quent, eˆtre optimise´es. Dans cet article, les performances hydrodynamiques et le transfert de matie`re de garnissages vrac et structure´s sont discute´s en terme de perte de charge, de capacite´et, le plus important, en terme de coefficients de transfert de matie`re, notamment l'aire interfaciale, parame`tre le plus important pour la conception d'absorbeurs de CO 2 . La comparaison de diffe´rents garnissages commerciaux a`haute efficacite´est discute´e a`partir de caracte´risations expe´rimentales et de simulations CFD et une me´thodologie pour de futurs de´veloppements est propose´e.Abstract -Pressure Drop, Capacity and Mass Transfer Area Requirements for Post-Combustion Carbon Capture by Solvents -Post-combustion capture processes using amines are considered as one of the preferred options for CO 2 Capture and Storage (CCS). However, the cost of avoided CO 2 is very large and must be reduced. The latter cost is strongly linked with column designs which consequently must be optimized. In the present article, hydrodynamics and mass transfer performances of random and structured packings are discussed in terms of pressure drop, capacity and most importantly in terms of mass transfer parameters, in particular in terms of interfacial area which is the most important parameter for CO 2 absorbers design. Comparison of different commercial high efficiency packings is discussed from experimental characterization and from CFD simulations and a methodology for future developments is proposed.

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Influence of Surface Tension on Effective Packing Area

Cited by 62 publications

References 21 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

New mass‐transfer correlations for packed towers

Pressure Drop, Capacity and Mass Transfer Area Requirements for Post-Combustion Carbon Capture by Solvents

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