Hydrodynamics of Packed Bed Column: Study of the Column for the Absorption of CO2 in Water and its Efficiency

Ali, Syed Shahbaz; Akhtar, Javaid

doi:10.4172/2469-9861.1000122

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…With packed bed absorption columns, packing of different forms may be used as charging: Raschig rings, Berl saddles, Pall rings, Sulzer structured packing, Intalox ceramic saddles, composite packing (grids and networks), and other kinds of packing (5)(6)(7). In more experimental work with the absorption column with packing, it is very important to know the hydrodynamic characteristics of absorption devices, as well as mass transfer between the phases, which determine the efficiency and performance of the column for separation processes (8)(9)(10).…”

Section: Introductionmentioning

confidence: 99%

Packed bed absorption column: Hydrodynamics and mass transfer

et al. 2019

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This paper presents the results of the determination of the hydrodynamic characteristics and mass transfer in the pilot plate absorption column. The experimental values of the pressure drop in the countercurrent flow of air and water through the column were obtained. The graphic dependence of the pressure drop of air per unit height of the layer of packing (ΔP/h) on the apparent air velocity (Ug) through the dry charge was shown to be in the form of a quadratic function. From the graphical function which shows the dependence of the pressure drop per unit height of the layer of filling (ΔP/m) on the apparent air velocity during the countercurrent flow of the phases (water and air), three fields of the interaction of the phases were observed: a) the area of low load, at low apparent air velocities, b) the area of high load, at higher air velocities, and c) the flooding area, when the liquid completely fills the cavities and the working gas in them starts bubbling. The overall mass transfer coefficient (Kg) of the air-CO 2-water system depends on the flow rate of the gaseous phase and the composition of the starting gas mixture (air-CO 2). With the increase in the total gas flow rate, with a constant composition of the starting gas mixture and constant fluid flow, the overall mass transfer coefficient increases. Increasing the amount of CO 2 in the starting gas mixture at a constant flow rate of fluid and a constant ratio of the molar flow of the inert in the liquid and the gas-phase (L'/G') decreases the overall mass transfer coefficient.

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Section: Introductionmentioning

confidence: 99%

Packed bed absorption column: Hydrodynamics and mass transfer

et al. 2019

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Experimental and modeling studies of mass transfer and hydrodynamics in a packed bed absorption column for CO2 - water system

Balaban

Nikolovski

Perušić

et al. 2023

Hem Ind

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This paper presents research on hydrodynamics and mass transfer in a packed absorption column. Experimental data on dry column pressure drop, flooding point, and efficiency of absorption of CO2 in water is obtained on a lab-scale absorption column packed with Raschig rings. Auxiliary parts of equipment together with chemical analyses provide simple monitoring and collecting the data. All obtained data were used to test different mathematical models for a given problem, i.e. for determination of the dry column pressure drop, flooding point and the overall gas transfer unit height. For dry column pressure drop, models developed primarily for packed columns described the data the best, with the Billet model generating a 6.54 % mean error, followed by Mackowiak and Stichlmair models. In flooding point calculations, empirical models were tested and models of Lobo, Leva and Takahshi gave the best results. Mass transfer (absorption) experiments gave expected results, since absorption efficiency increased with the increase in the liquid/gas flow rate ratio, i.e. with approaching the flooding point. The Onda?s model was used to calculate partial mass transfer coefficients in liquid and gas phases based on which the height of the overall gas transfer unit was estimated and subsequently compared with the experimental data. Deviation of calculated and experimental results for the height of the overall gas transfer unit is in the expected range of 0-20 %, with mean value of 15.5 %. In conclusion, the available models for determination of the investigated hydrodynamics and mass transfer parameters in packed absorption columns gave adequate results in comparison to the experimental values.

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Columnas empacadas para la producción de enzimas lignolíticas a partir de residuos agroindustriales

Zambrano-Macías

Vera-Párraga

Rosero-Delgado

2021

Revista Científica INGENIAR: Ingeniería, Tecnología E Investigación

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Comenzando con una breve descripción de la fermentación en estado sólido (FES) se señalan las enzimas producidas por diferentes microorganismos sobre distintos sustratos sólidos. Se detallan las columnas empacadas tradicionales como biorreactor de FES y se revisan las variables de interés como temperatura, aireación, tamaño y forma de las partículas, densidad de empaque, porosidad, actividad de agua y pH. Se puntualizan consideraciones que son cruciales en el rendimiento de un biorreactor de columna empacada como la selección del sistema, relación del tamaño, agitación, calor metabólico, influencia del aire en el calor metabólico. Se incluyen ecuaciones que permiten estudiar la actividad metabólica del microorganismo como la ecuación estequiométrica general, el coeficiente respiratorio y el rendimiento biomasa/sustrato (Yx/s). Se señalan los factores biológicos que permiten evaluar el crecimiento de la biomasa como la tasa de crecimiento específico (μ), la tasa específica de consumo del sustrato (qs) y el tiempo de latencia (λ). Se indica el rol de la modelación matemática en el biorreactor y se plantean las ecuaciones Logística modificada y Gompertz modificada para describir el rendimiento general del biorreactor. Palabras clave: fermentación en estado sólido, enzimas, columnas empacadas, biomasa.

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Hydrodynamics of Packed Bed Column: Study of the Column for the Absorption of CO2 in Water and its Efficiency

Cited by 3 publications

References 5 publications

Packed bed absorption column: Hydrodynamics and mass transfer

Packed bed absorption column: Hydrodynamics and mass transfer

Experimental and modeling studies of mass transfer and hydrodynamics in a packed bed absorption column for CO2 - water system

Columnas empacadas para la producción de enzimas lignolíticas a partir de residuos agroindustriales

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