Ultrasonic Enhancement of CO<sub>2</sub> Desorption from MDEA Solution in Microchannels

Liu, Hongchen; Zhao, Shuainan; Zhou, Feng; Yao, Chaoqun; Chen, Guangwen

doi:10.1021/acs.iecr.8b06050

Cited by 18 publications

(9 citation statements)

References 37 publications

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“…Nandhini et al 121 . and Liu et al 122 . looked at different sonic parameters for CO 2 stripping performance and found that the technology shows high performance effectiveness in comparison to conventional stripping.…”

Section: Process Intensification Options For Pccmentioning

confidence: 99%

“…120 A study on solvent capacity reduction resulting from thermal degradation shows that for a 5-h megasonic regeneration, there was a 15.78% capacity loss whereas there was a loss of 11.68% in just 1 h for furnace heating, demonstrating the reduction in solvent make-up in megasonic regeneration. 120 Nandhini et al 121 and Liu et al 122 looked at different sonic parameters for CO 2 stripping performance and found that the technology shows high performance effectiveness in comparison to conventional stripping.…”

Section: Microreactor For Co 2 Capturementioning

confidence: 99%

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Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Joel

Isa

2022

J of Chemical Tech & Biotech

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A global net zero target by mid-century and keeping the maximum global temperature rise to below 1.5 °C was agreed by nearly 200 nations at the 26th UN Climate Change Conference of the Parties. The Intergovernmental Panel on Climate Change advises that emission cuts by 45% are needed by 2030 in order to maintain the global temperature rise below the 1.5 °C target. To achieve this target, it is necessary to investigate technological options that are economically viable and globally acceptable for commercial deployment. This review paper looks at the new technologies needed to reduce CO 2 emission and to motivate commercial deployment, considering that the commercial deployment of CO 2 has been slowed down as a result of high capital and operating expenses which invariably increase the cost of energy. The paper presents a review on early years of process intensification technologies as well as a discussion on potential new process intensification options for CO 2 capture, with suggestions on how to modify those technologies for suitable application to solvent-based carbon capture. The work further discusses current process intensification technologies used for CO 2 capture applications. Solvent developments for enhancing CO 2 capture also are discussed as they contribute to cutting down the sizes of the units as well as decreasing the cost of regeneration which leads to reduction in capital and operating costs. A process flow diagram using a mop fan for capture of CO 2 from buildings is proposed. In addition, a new flow diagram is proposed for using loop reactor technology to capture CO 2 from large point sources, and finally a new process diagram using rotating packed bed absorber combined with sono-assisted regenerator is presented for improved performance of CO 2 capture technology. Recommendations on these diagrams are made to help ensure transition toward the net zero target.

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Section: Process Intensification Options For Pccmentioning

confidence: 99%

Section: Microreactor For Co 2 Capturementioning

confidence: 99%

Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Joel

Isa

2022

J of Chemical Tech & Biotech

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“…The solvent loss was only 3.15%, whereas it can rise to 11.65% for conventional technologies . Liu et al recently used ultrasound irradiation to regenerate the MDEA solvent in a microreactor system, referring to the method as an ultrasonic microreactor . Adding ultrasound assistance enhanced the mass transfer performance at low temperatures and bigger microchannels.…”

Section: Process Intensification Technologiesmentioning

confidence: 99%

“…102 Liu et al recently used ultrasound irradiation to regenerate the MDEA solvent in a microreactor system, referring to the method as an ultrasonic microreactor. 103 Adding ultrasound assistance enhanced the mass transfer performance at low temperatures and bigger microchannels. The improved regeneration performance of the ultrasonic microreactor was ascribed to the higher bubble growth rate in the microreactor, which was caused by improved diffusion and increased bubble coalescence.…”

mentioning

confidence: 99%

Process Intensification of CO₂ Desorption

Gecim

Ouyang

Roy

et al. 2022

Ind. Eng. Chem. Res.

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Anthropogenic climate change due to, among other causes, unhindered CO 2 emissions is a major concern worldwide. The postcombustion capture (PCC) process using a solvent, known as chemical absorption, is currently the most effective way to reduce CO 2 emissions from large point sources. However, high capital investment costs when using the conventional packed bed absorber/desorber technology and high energy requirements during solvent regeneration are the primary obstacles for its large-scale implementation. Different process intensification (PI) technologies to desorb CO 2 from the solvent have been introduced to mitigate the energy consumption compared to the conventional packed bed technology. This work reviews different technologies for intensification of CO 2 desorption. In this context, rotating packed beds, microreactors, and membrane contactors have been explored as potential alternatives to intensify the desorption because of their superior mass and heat transfer. Alternative energy sources like ultrasound and microwaves have also been used to improve the desorption performance of conventional equipments. PI can also be realized by using novel solvents with improved desorption kinetics in combination with intensification equipment. Thus in this review, a comprehensive assessment of different existing PI technologies based on regeneration energies and regeneration efficiencies relative to conventional technology is presented. The intensification of mass transfer for the different technologies is compared, and a new parameter, named the regeneration factor, is proposed to evaluate the performance of PI equipment. This study outlines the advances in process intensification of CO 2 desorption technologies to date and presents an overview of the merits and limits of all technologies.

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“…The coupling of surface wave and microstreaming has been demonstrated to improve the mass-transfer efficiency significantly, resulting in an enhanced mass-transfer coefficient of 3−20 times more than that without ultrasound. Zhao et al 9 and Liu et al 13 further investigated the ultrasonic intensification in extraction and gas desorption. The results show that mass transfer enhances in both the gas−liquid system and liquid−liquid system due to the dynamic interface caused by bubble oscillation.…”

Section: Introductionmentioning

confidence: 99%

Microcavity-Enabled Local Oscillation of Taylor Bubbles in a Microchannel

Cheng

Chen

et al. 2021

Ind. Eng. Chem. Res.

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Interphase mass transport is important for many industrial applications ranging from multiphase reaction and separation but remains a great challenge in maximizing the interface area and mass-transfer flux. In this work, a periodical oscillation of Taylor bubbles is demonstrated to enhance interface transport by arranging gas microcavities on the walls of a rectangular microchannel. Bubble oscillation is characterized as the expansion and contraction of the bubble tail near the gas microcavity. Microscope visualization results show that the oscillation amplitude increases with a decrease of cavity width, while it decreases with an increase of capillary number. This is attributed to the increased hydrodynamic resistance in the liquid film between bubble surface and gas microcavity. The evolution of slip velocity at the gas microcavity interface is numerically investigated to explain the interaction between dynamic pressure and Laplace pressure, where bubble velocity fluctuation occurs. A bubble oscillation map is proposed to offer insight into the role of the gas microcavity, providing a quantitative basis to optimize the surface design and operating conditions.

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Ultrasonic Enhancement of CO₂ Desorption from MDEA Solution in Microchannels

Cited by 18 publications

References 37 publications

Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Process Intensification of CO₂ Desorption

Microcavity-Enabled Local Oscillation of Taylor Bubbles in a Microchannel

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Ultrasonic Enhancement of CO2 Desorption from MDEA Solution in Microchannels

Cited by 18 publications

References 37 publications

Novelty in fossil fuel carbon abatement technologies in the 21st Century: post‐combustion carbon capture

Novelty in fossil fuel carbon abatement technologies in the 21st Century: post‐combustion carbon capture

Process Intensification of CO2 Desorption

Microcavity-Enabled Local Oscillation of Taylor Bubbles in a Microchannel

Contact Info

Product

Resources

About

Ultrasonic Enhancement of CO₂ Desorption from MDEA Solution in Microchannels

Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Novelty in fossil fuel carbon abatement technologies in the 21^st Century: post‐combustion carbon capture

Process Intensification of CO₂ Desorption