Process intensification in gas-liquid mass transfer by nanofluids: Mechanism and current status

Zhang, Huan; Wang, Bing; Xiong, Mingyang; Gao, Chunyang; Ren, Hongyang; Ma, Liang

doi:10.1016/j.molliq.2021.118268

Cited by 23 publications

(9 citation statements)

References 205 publications

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“…Microsize equipment attract wide attention in the CO 2 absorption process due to a high removal efficiency, selectivity, and integration level and controllability . Three ways can be used to enhance the mass transfer in the gas absorption process, including structure design, dispersed particles (such as catalyst and adsorbent), and energy fields (such as magnetic, electric, and ultrasonic fields) …”

Section: Approaches For Mass Transfer Enhancementmentioning

confidence: 99%

“…In this way, the gas−liquid mass transfer area is increased. 395 Studies on the gas−liquid−solid three-phase flow hydrodynamics are significantly less than the two-phase flow. In particular, most of these studies are based on the E-E model; studies which are based on the E-L model are scarce.…”

Section: Hollow Fiber Membrane Modulementioning

confidence: 99%

“…On the other hand, nanoparticles adhere to the bubbles and inhibit the bubbles from coalescence. In this way, the gas–liquid mass transfer area is increased …”

Section: Approaches For Mass Transfer Enhancementmentioning

confidence: 99%

Section: Approaches For Mass Transfer Enhancementmentioning

confidence: 99%

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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: Approaches For Mass Transfer Enhancementmentioning

confidence: 99%

Section: Hollow Fiber Membrane Modulementioning

confidence: 99%

“…On the other hand, nanoparticles adhere to the bubbles and inhibit the bubbles from coalescence. In this way, the gas–liquid mass transfer area is increased …”

Section: Approaches For Mass Transfer Enhancementmentioning

confidence: 99%

Section: Approaches For Mass Transfer Enhancementmentioning

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.

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“…Hence, the enhancement effect of these methods was limited. According to existing research, adding fine particles in the liquid can strengthen the mass transfer process, and fine particles can decrease the mass transfer resistance and speed up the mass transfer rate. , In recent decades, with the maturity of nanomaterial preparation technology, the application range of particles extended from the micron level to the nanometer level, and more research on the promotion of gas–liquid mass transfer with nanoparticles has also been catalyzed. , At present, Fe 3 O 4 , Al 2 O 3 , SiO 2 , and CNT , nanofluids have been widely used by researchers to enhance gas–liquid mass transfer such as the absorption of CH 4 , NH 3 , water vapor, O 2 , CO 2 , , CO, and other gases, and nanofluids had excellent performance in enhancing gas–liquid mass transfer. These studies provided the possibility for the industrial application of nanoscale particles to enhance gas absorption.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Enhancement of Gas–Liquid Mass Transfer of Absorption of H₂S by MDEA with Carbon Quantum Dots

Ma,

Zhao

2023

ACS Omega

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Although the addition of fine particles can enhance mass transfer, the stability of suspension is still a challenge. Responding to this, this study introduced carbon quantum dots (CQDs) with good hydrophilicity into a desulfurizer. N-doped carbon quantum dots (N-CQDs) were prepared by the hydrothermal method and characterized by TEM, FT-IR, and XPS. The stability and rheological properties of MDEA-based CQD solutions with different concentrations were studied. CQD solutions with low concentrations showed good stability, and the viscosity of CQD solutions was positively correlated with concentration and inversely correlated with temperature. The desulfurization experiment showed that the desulfurization effect and mass transfer enhancement of MDEA-based CQD solutions were coinfluenced by the viscosity and concentration of the solution; 0.01 vol % CQD solution had the best desulfurization effect, and the mass transfer coefficient was 0.66 mol/(m3h kPa), which increased by 26.61% compared to the base solution.

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Experimental investigation, modelling, and order of magnitude analysis of oxygen mass transfer in pulsed plate column with α‐Fe₂O₃ nanofluid

Shet,

Shetty K.

2024

Can J Chem Eng

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Volumetric oxygen mass transfer coefficient (kLa) is an important parameter in the design of various reactors and bioreactors. In the present work, the influence of α‐Fe2O3 nanofluid on the enhancement of kLa is studied in a pulsed plate column (PPC). An enhancement factor of greater than one showed that the nanofluid is favourable in enhancing the mass transfer rate. The effect of pulsing velocity on kLa is observed to fall under two regimes: the dispersion regime and emulsion regime. The kLa enhancement factor is found to be higher in TiO2 nanofluid than in α‐Fe2O3 nanofluid, indicating that the type of nanofluid influences the enhancement factor. The order of magnitude analysis showed that localized convection triggered by the Brownian motion of nanoparticles is the phenomenon responsible for kLa enhancement. A dimensionless multiple regression analysis (MRA) model was developed to predict kLa in the nanoparticle loading range of 0.003–0.019 (v/v%), relating the Sherwood number with oscillating Reynolds number (1200 ≤ Reo ≤ 20,000), gas flow Reynolds number (0.135 ≤ Reg ≤0.370), Schmidt number (1300 ≤ Sc ≤2700), and Brownian Reynolds number (2.81 × 10−4 ≤ ReB ≤5 × 10−4). The pseudo‐homogeneous model could accurately predict the enhancement until critical loading conditions.

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Process intensification in gas-liquid mass transfer by nanofluids: Mechanism and current status

Cited by 23 publications

References 205 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

Investigation into the Enhancement of Gas–Liquid Mass Transfer of Absorption of H₂S by MDEA with Carbon Quantum Dots

Experimental investigation, modelling, and order of magnitude analysis of oxygen mass transfer in pulsed plate column with α‐Fe₂O₃ nanofluid

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Process intensification in gas-liquid mass transfer by nanofluids: Mechanism and current status

Cited by 23 publications

References 205 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

Investigation into the Enhancement of Gas–Liquid Mass Transfer of Absorption of H2S by MDEA with Carbon Quantum Dots

Experimental investigation, modelling, and order of magnitude analysis of oxygen mass transfer in pulsed plate column with α‐Fe2O3 nanofluid

Contact Info

Product

Resources

About

Investigation into the Enhancement of Gas–Liquid Mass Transfer of Absorption of H₂S by MDEA with Carbon Quantum Dots

Experimental investigation, modelling, and order of magnitude analysis of oxygen mass transfer in pulsed plate column with α‐Fe₂O₃ nanofluid