A review of recent development in numerical simulation of ultrasonic-assisted gas-liquid mass transfer process

Tamidi, Athirah Mohd; Lau, Kok Keong; Khalit, Siti H.

doi:10.1016/j.compchemeng.2021.107498

Cited by 21 publications

(7 citation statements)

References 46 publications

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“…When the ultrasonic wave transmits to the liquid phase, some of the ultrasound energy is converted to heat energy, causing the liquid phase to heat up and evaporate. However, external cooling systems like an air fan, cooling water jacket, cooling coil, or water bath can maintain the liquid temperature and minimize evaporation [37]. cules once irradiated by high-frequency ultrasonic irradiation.…”

Section: Hplc Analysis Of Aqueous Mdea Solutionmentioning

confidence: 99%

Experimental Evaluation of Chemical Reactions Involved in Ultrasonic-Assisted Absorption of Bulk CO2

Shokrollahi,

Lau,

Partoon

2023

Processes

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As the most mature natural gas sweetening process, absorption has always been improved to meet the separation requirement. Recently, ultrasonic irradiation has been proposed as a technique that can intensify CO2 absorption. However, further studies are still required, particularly focusing on the sonochemical effect. Since the influence of the sonochemical effect on the reaction pathway is still debatable, attention must be given to verifying the influence of ultrasonic irradiation on the chemical reactions of CO2 absorption. Hence, this work aims to evaluate the influence of OH˙ radicals generated by the sonochemical effect on the chemical reactions involved during CO2 absorption using promoter-free methyldiethanolamine (MDEA). For the evaluation, various samples under irradiated and non-irradiated conditions are analyzed using the HPLC characterization technique. The results show that the hypothesis of changing the reaction pathway due to the presence of the sonochemical effect is invalid. However, it can accelerate the generation of hydroxyl radicals (OH˙) via water sonolysis. Thus, the origin of sonochemistry in aqueous solutions is defined as water sonolysis. The analysis of the CO2 absorption rate also demonstrates the presence of accelerated chemical reactions (contributed by the OH˙ radicals), which could potentially make the slow kinetic MDEA more practical for industrial application.

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Section: Hplc Analysis Of Aqueous Mdea Solutionmentioning

confidence: 99%

Experimental Evaluation of Chemical Reactions Involved in Ultrasonic-Assisted Absorption of Bulk CO2

Shokrollahi,

Lau,

Partoon

2023

Processes

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“…Ultrasonic power can enhance the mass transfer of CO 2 from the gas phase into the liquid phase by intensifying the physical interaction between the CO 2 molecules and the aMDEA solvent [33]. The intensified sonophysical enhancement, such as acoustic streaming and acoustic fountains, leads to better mixing and more interfacial area for mass transfer to occur [27,29,40].…”

Section: Effect Of Ultrasonic Powermentioning

confidence: 99%

“…Numerical simulation has gained prominence in the advancement of ultrasonicassisted gas-liquid mass transfer technology. This approach offers a comprehensive understanding of the distinctive flow behaviors induced by high-frequency ultrasound waves, such as mixing, cavitation, and heat and mass transfer mechanisms [31][32][33]. For instance, Abolhasani et al ( 2012) conducted a numerical study on the effect of high-frequency ultrasonic waves on the heat transfer rate [34].…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling and Economic Analysis of Ultrasonic-Assisted CO2 Absorption Process for Offshore Application

Mohd Tamidi,

Lau,

et al. 2023

Processes

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In the quest for net zero carbon emissions by 2050, Carbon Capture Utilization and Storage (CCUS) is indispensable. The development of more efficient CO2 capture processes is essential. High-frequency ultrasonic irradiation is an emerging, intensified technique that can enhance the CO2 absorption process. To advance this technology toward commercialization, it is crucial to conduct a thorough economic analysis to allow the identification of the key cost component. While equipment sizing is essential in this economic assessment, there is a lack of numerical models for estimating the size and power consumption of ultrasonic absorbers. This study introduces a numerical model for these predictions. The model was then used to determine the economic feasibility of this emerging technique against the packed bed columns based on capital expenditure (CAPEX), operational expenditure (OPEX), and unit technical cost (UTC) for 20 years of plant operation. According to the economic analysis, ultrasonic intensification requires 34% less CAPEX due to its compact design. Although its OPEX is 11% higher due to the additional electricity needed for the ultrasonic transducers, the UTC is still 3% lower than the conventional packed bed column, demonstrating a potential cost savings in implementing the ultrasonic irradiation-assisted technique during the CO2 absorption process offshore.

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“…The experimental study on batch systems was conducted to investigate the fundamental theories of high-frequency ultrasonic waves on the absorption process. Generally, from the batch system experimental study, the gas-liquid mass transfer coefficient was found to increase with the increase in ultrasonic power but decrease with the increase in sonicated liquid height, volume and distance from the ultrasonic transducer [23]. However, industrial applications are operated in continuous systems for more effective and cost-saving operations than batch systems.…”

Section: Introductionmentioning

confidence: 99%

“…Fluid motions resulting from the propagation of ultrasound wave in liquid medium. Adapted with permission from Ref [23]…”

mentioning

confidence: 99%

Enhancement of CO2 Absorption Process Using High-Frequency Ultrasonic Waves

Tamidi,

Lau,

Yusof

et al. 2023

Sustainability

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The advancement of efficient carbon capture technology is vital for the transition to a net-zero carbon future. Critical developments in ultrasonic irradiation can be used to enhance the conventional CO2 absorption process. For example, sonophysical effects such as acoustic streaming, acoustic cavitation, acoustic fountain and atomization induced by the propagation of high-frequency ultrasonic waves in a liquid medium can enhance the mixing and create a larger interfacial area for gas–liquid mass transfer. In this study, the performance of a continuous ultrasonic-assisted CO2 absorption process using MDEA was investigated. The design of experiment (DOE) was used to study the effect of the gas flowrate, liquid flowrate and ultrasonic power on CO2 absorption performance. Based on the findings, ultrasonic power was the most significant parameter affecting the CO2 outlet concentration, liquid-to-gas ratio (L/G) and mass transfer coefficient (KGa), which confirmed that ultrasonic irradiation has a significant impact on the intensification of the CO2 absorption process. The optimum condition to achieve the target CO2 absorption performance was numerically determined and validated with experimental tests. The results from the verification runs were in good agreement with the predicted values, and the average error was less than 10%.

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A review of recent development in numerical simulation of ultrasonic-assisted gas-liquid mass transfer process

Cited by 21 publications

References 46 publications

Experimental Evaluation of Chemical Reactions Involved in Ultrasonic-Assisted Absorption of Bulk CO2

Experimental Evaluation of Chemical Reactions Involved in Ultrasonic-Assisted Absorption of Bulk CO2

Numerical Modeling and Economic Analysis of Ultrasonic-Assisted CO2 Absorption Process for Offshore Application

Enhancement of CO2 Absorption Process Using High-Frequency Ultrasonic Waves

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