Interfacial area and gas-side mass transfer coefficient of a gas—liquid absorption column: pilot-scale comparison of various tray types

Peytavy, Jean‐Louis; Huor, M. H.; Bugarel, R.; Laurent, André

doi:10.1016/0255-2701(90)87004-3

Cited by 10 publications

(10 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the Scheffe system, 11 the results calculated by our model showed obvious positive deviations. By contrast, the Azrak 12 and Peytavy 13 systems showed negative deviations. The experimental valve of Scheffe 11 is Glistch V-1, and its structure is similar to that of the Glistch V-4 valve, which was used in Brahem's experiment.…”

Section: Validation Of the Extended New Interfacial Area Modelmentioning

confidence: 50%

“…In Liang's system, 14 foaming can be ignored because the system is air-water. However, moderate or heavy foaming would occur in the systems of Azrak 12 and Peytavy 13 because DEA can decrease the water surface tension. Once the foam becomes established, the mean bubble size will decrease, whereas the gas holdups will increase.…”

Section: Data For Model Development and Testingmentioning

confidence: 98%

“…11,14,15 The experimental data are summarized in 13 However, the space height of the column was not provided; thus, the exact LP/SP ratio is unknown. Moreover, estimation was performed to obtain the LP/SP.…”

Section: Validation Of the Extended New Interfacial Area Modelmentioning

confidence: 99%

“…Models are developed using small-scale tray experimental data. [11][12][13][14] These models are empirical and semiempirical. However, the effect of gas-liquid nonideal flow on the interfacial area was not considered in such models; thus, they cannot be used to predict the gas-liquid interfacial area of large-scale trays.…”

Section: Introductionmentioning

confidence: 99%

“…2 However, previous research on hydrodynamics and mass transfer has mainly focused on sieve trays, [3][4][5][6][7][8][9][10] and little attention has been centered on valve trays. [11][12][13][14][15] Therefore, high-accuracy models should be developed on the basis of theoretical research regarding the actual flow characteristics of gas-liquid in valve trays to calculate the hydraulic and mass transfer rates. These models will provide theoretical guidance for the reasonable design and optimization of trays.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Prediction of gas–liquid interfacial area in valve trays

Wang¹,

Leng²,

Shao³

et al. 2015

AIChE Journal

View full text Add to dashboard Cite

An accurate prediction of gas-liquid interfacial area is very important for the design and optimization of column trays. However, the difference of the gas-liquid flow regimes operating at different scale trays significantly affect the interfacial area calculation. Therefore, in this study, an interfacial area model operating at small column was established using the Kolmogorov's isotropic turbulence hypothesis. According to the analyzes of the gas-liquid flow phenomena of different scale columns, an assumption that the similarity principle of flow characteristics of gas-liquid in full contact was proposed. Moreover, a new model that can be used to predict the gas-liquid interfacial area of a large column with exiting the nonideal flow was obtained through the extension of the small tray interfacial area model based on this principle. Finally, the new model was tested by comparisons with the experimental results of references. The prediction accuracy significantly improved with the maximum deviation of approximately 40%. V C 2015 American Institute of Chemical Engineers AIChE J, 62: 905-915, 2016 Keywords: distillation, different scales, valve tray, interfacial area, physical model IntroductionDistillation is the major process in present and future petroleum and/or chemical industries.1 Heat and mass transfers between gas and liquid phases occur in trays during distillation. Briefly, these transfer processes occur via phase interface. Hence, the interfacial area is an important field of investigation in chemical engineering research. Generally, studies on the interfacial area have mainly focused on two aspects: (1) increasing the contact interfacial area of the gasliquid interface by some means or the optimization of equipment structures to enhance the mass and heat transfer processes and (2) developing gas-liquid interfacial area models to predict the transfer of mass or heat. Valve trays grafted with some special structures are widely used as contactors for distillation/absorption columns because of their high tray efficiency, relatively low pressure drop, and large operation range (enhanced performance).2 However, previous research on hydrodynamics and mass transfer has mainly focused on sieve trays, [3][4][5][6][7][8][9][10] and little attention has been centered on valve trays.11-15 Therefore, high-accuracy models should be developed on the basis of theoretical research regarding the actual flow characteristics of gas-liquid in valve trays to calculate the hydraulic and mass transfer rates. These models will provide theoretical guidance for the reasonable design and optimization of trays.Column diameter and height are two main parameters involved in industrial column design. The column diameter is controlled by two-phase flow hydrodynamic behavior (weeping or flooding), whereas the total column height is controlled by mass transfer parameters. 15 To date, the actual trays of a column (cf. column height) are determined by two main methods: (1) tray efficiency based on equilibrium stage model [16][17][18] an...

show abstract

Section: Validation Of the Extended New Interfacial Area Modelmentioning

confidence: 50%

Section: Data For Model Development and Testingmentioning

confidence: 98%

Section: Validation Of the Extended New Interfacial Area Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Prediction of gas–liquid interfacial area in valve trays

Wang¹,

Leng²,

Shao³

et al. 2015

AIChE Journal

View full text Add to dashboard Cite

show abstract

Absorption

Karayiannis

Laso

2018

Kirk-Othmer Encyclopedia of Chemical Technology

View full text Add to dashboard Cite

Absorption, or gas absorption, is a unit operation used in the chemical industry to separate gases by washing or scrubbing a gas mixture with a suitable liquid. One or more of the gas components dissolves or is absorbed in the liquid and is thus removed from the mixture. Absorption is currently one of the most important processes in chemical engineering not only for product recovery but also, and perhaps mainly, for pollutant removal. Intense industrial and academic effort is focused on optimizing the process, in terms process efficiency as well as commercial aspects. In this article, the fundamental principles of gas solubility and mass transfer, design and operation of industrial equipment with relevant examples of typical commercial gas absorption processes are discussed, including recent developments in these areas.

show abstract

Simulation thermischer Trennverfahren fluider Vielkomponentengemische

Górak¹,

Schüler

1994

Prozeßsimulation

View full text Add to dashboard Cite

Interfacial area and gas-side mass transfer coefficient of a gas—liquid absorption column: pilot-scale comparison of various tray types

Cited by 10 publications

References 8 publications

Prediction of gas–liquid interfacial area in valve trays

Prediction of gas–liquid interfacial area in valve trays

Absorption

Simulation thermischer Trennverfahren fluider Vielkomponentengemische

Contact Info

Product

Resources

About