Bubble behaviors and CO2 absorption characteristics in nanoabsorbents

Li, Lirong; Kang, Yong Tae

doi:10.1016/j.jcou.2019.07.037

Cited by 11 publications

(9 citation statements)

References 27 publications

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“…The wall lubrication force exists when the bubbles approach the wall, with the direction of the force pointing to the normal direction away from the wall. 200 Antal et al 274 first proposed a model for the wall lubrication coefficient which is related with the diameter of bubbles and the distance of bubbles from the wall in the laminar two phase flow. The wall lubrication force based on Antal model is described by eq 26.…”

Section: Application and Comparisonmentioning

confidence: 99%

“…Here, C w1 and C w2 are treated as constant values of −0.01 and 0.05, separately. Currently, Antal model has been broadly utilized in gas–liquid flow in bubble column reactors. ,, F⃗ W = C W ρ l α g false| ( u⃗ l − u⃗ g ) false| 2 n⃗ W C W = max ( 0 , C W 1 d b + C W 2 y W ) …”

Section: Two/three Phase Flowmentioning

confidence: 99%

“…As a result, the heat and mass transfer rate of the segment plug flow are greatly affected. Li et al 200 investigated the dynamic characteristic of continuously rising bubbles and its influence on the mass transfer coefficient of CO 2 in nanofluids and used the PBMcoupled VOF method to accurately model the coalescence and rupture process of continuously rising bubbles. Results indicate that the wake vortex formed by the guiding bubble flow plays a leading role in the coalescence and fracture of the bubbles.…”

Section: Multiphase Modelmentioning

confidence: 99%

“…Currently, Antal model has been broadly utilized in gas−liquid flow in bubble column reactors. 194,200,202…”

Section: Application and Comparisonmentioning

confidence: 99%

See 3 more Smart Citations

Computational Fluid Dynamics Based Modeling of Gas Absorption Process: A State-of-the-Art Review

Liu,

Wang,

Cai

et al. 2024

Ind. Eng. Chem. Res.

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The effective removal of gas phase species relies on effective gas liquid hydrodynamic contact coupling with fast chemical reaction rates. To promote mass transfer rate and the development of reagents, computational fluid dynamic modeling has long been recognized as an effective methodology for the quantification of physical and chemical parameters. The simulation of the gas liquid process involves the coupling of models including multiphase flow, turbulence, interfacial forces, mass transfer, and chemical reactions. The selection of suitable models according to practical applications has been challenging. In terms of multiphase flow, volume of fraction, Euler−Euler, and Euler−Lagrange approaches are discussed. With regard to turbulence, direct numerical simulation, large eddy simulation, and Reynolds averaged Navier−Stokes approach are compared. With respect to interfacial forces, the dominance of drag, lift, virtual mass, wall lubrication, and turbulent dispersion forces for different situations are obtained. In terms of mass transfer, the development and applications of film model, dimensionless analysis, penetration model, and surface renewal model are discussed. Different methodologies to enhance mass transfer include improvement of equipment structure, addition of nanofluid, and exposure to an energy field are summarized. To accelerate the computational process, four methods including the space−time conservation element and solution element model, compartmental model, reduction in dimension, and multiscale approach are discussed. This paper intends to provide a thorough review on the applications of different models to different situations and, in particular, to reveal the restrictions of different models. Overall, this study lays the foundation for future studies on the optimization of scrubbers for large scale practical applications. It also allows a deeper understanding of the interactions of fluid dynamics, mass transfer, and chemical reactions.

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Section: Application and Comparisonmentioning

confidence: 99%

Section: Two/three Phase Flowmentioning

confidence: 99%

Section: Multiphase Modelmentioning

confidence: 99%

“…Currently, Antal model has been broadly utilized in gas−liquid flow in bubble column reactors. 194,200,202…”

Section: Application and Comparisonmentioning

confidence: 99%

See 2 more Smart Citations

Computational Fluid Dynamics Based Modeling of Gas Absorption Process: A State-of-the-Art Review

Liu,

Wang,

Cai

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Compared with theoretical research, experimental studies have been deeply studied in many fields of CO 2 bubble dynamics. Generally speaking, the dynamic parameters of the CO 2 bubble can be analyzed by using the above test equipment, such as bubble radius, rising velocity, deformation rate, aspect ratio, etc. − It is simple to measure the CO 2 bubble dynamic characteristics in solution using these parameters in Table . The utilization of the CO 2 bubble provides some references for enhancing absorption and reducing the greenhouse effect.…”

Section: Experimental Study On Co2 Bubble Dynamics In Different Solut...mentioning

confidence: 99%

Review and Perspectives on CO₂ Bubble Dynamic Characteristics in Different Liquids during Carbon Capture, Utilization, and Storage Process

Gao

Yang

et al. 2022

Energy Fuels

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Carbon dioxide (CO 2 ) bubbles are common during carbon capture, utilization, and storage (CCUS) processes and have many impacts on water conservancy machinery, metallurgy, and the chemical industry. To explore the dynamic characteristics of CO 2 bubbles in different liquids in CCUS, the motion mechanism of CO 2 bubbles was integrated, and the effects of different liquid characteristics and different external conditions on the dynamic characteristics of CO 2 bubbles were classified and summarized. At the same time, the research progress of numerical simulation on CO 2 bubble dynamics is reviewed. Therefore, approaches and methods that can be further explored in theoretical analysis, experimental research, and numerical simulation of CO 2 bubble dynamics are proposed, which can provide reference and guidance for engineering practice, especially CCUS technologies.

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Removal performance, mechanisms, and influencing factors of biochar for air pollutants: a critical review

Zhao

Wang

Theng

et al. 2022

Biochar

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The emission of air pollutants from various industries is a major contributor to environmental pollution. The removal of these pollutants before they are discharged into the environment has become an important means of controlling air pollution. Biochar has attracted increasing attention because of its low cost, high porosity, large specific surface area, abundant surface functional groups, and high removal capacity. The physicochemical properties of biochar are greatly affected by feedstock types, preparation, and modification conditions. For this reason, the capacity and propensity of biochar for removing air pollutants are rather variable. To understand the existing research status and grasp the latest research progress, a systematic review on the removal of different air pollutants by biochar is highly needed. Based on the recent research, this paper systematically analyzes and summarizes the preparation and modification methods of biochar commonly used for the removal of six air pollutants (SO2, H2S, CO2, Hg0, VOCs, and NH3), as well as the removal performance and mechanisms. Then, the potential influencing factors (preparation parameters, physicochemical characteristics of biochar, and removal conditions) are discussed. Finally, the regeneration of biochar, suggestions, and future perspectives are proposed. Graphical Abstract

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Bubble behaviors and CO2 absorption characteristics in nanoabsorbents

Cited by 11 publications

References 27 publications

Computational Fluid Dynamics Based Modeling of Gas Absorption Process: A State-of-the-Art Review

Computational Fluid Dynamics Based Modeling of Gas Absorption Process: A State-of-the-Art Review

Review and Perspectives on CO₂ Bubble Dynamic Characteristics in Different Liquids during Carbon Capture, Utilization, and Storage Process

Removal performance, mechanisms, and influencing factors of biochar for air pollutants: a critical review

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Bubble behaviors and CO2 absorption characteristics in nanoabsorbents

Cited by 11 publications

References 27 publications

Computational Fluid Dynamics Based Modeling of Gas Absorption Process: A State-of-the-Art Review

Computational Fluid Dynamics Based Modeling of Gas Absorption Process: A State-of-the-Art Review

Review and Perspectives on CO2 Bubble Dynamic Characteristics in Different Liquids during Carbon Capture, Utilization, and Storage Process

Removal performance, mechanisms, and influencing factors of biochar for air pollutants: a critical review

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Product

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Review and Perspectives on CO₂ Bubble Dynamic Characteristics in Different Liquids during Carbon Capture, Utilization, and Storage Process