Modelling and Design of Carbon Dioxide Absorption in Rotating Packed Bed and Packed Column

Thiels, Matt; Wong, David Shan Hill; Yu, Cheng-Hsiu; Kang, Jia-Lin; Jang, Shi-Shang; Tan, Chung-San

doi:10.1016/j.ifacol.2016.07.303

Cited by 23 publications

(24 citation statements)

References 15 publications

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“…This allows higher flooding rate and lower interfacial mass transfer resistance resulting in significant reduction in the packed bed sizes. Recent studies have demonstrated prospects of replacing conventional packed beds in PCC with RPB (Agarwal et al 2010;Joel et al 2014;Thiels et al 2016). Agarwal et al (2010) and Joel et al (2014) reported 7 and 12 times packing volume reduction respectively for separate cases involving replacement of conventional packed bed with RPB for Absorbers in PCC based on chemical absorption.…”

Section: Commercial Deploymentmentioning

confidence: 99%

Current status and future development of solvent-based carbon capture

Oko

Wang

Joel

2017

Int J Coal Sci Technol

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Solvent-based carbon capture is the most commercially-ready technology for economically and sustainably reaching carbon emission reduction targets in the power sector. Globally, the technology has been deployed to deal with flue gases from large scale power plants and different carbon-intensive industries. The success of the technology is due to significant R&D activities on the process development and decades of industrial experience on acid gas removal processes from gaseous mixtures. In this paper, current status of PCC based on chemical absorption-commercial deployment and demonstration projects, analysis of different solvents and process configurations-is reviewed. Although some successes have been recorded in developing this technology, its commercialization has been generally slow as evidenced in the cancellation of high profile projects across the world. This is partly due to the huge cost burden of the technology and unpredictable government policies. Different research directions, namely new process development involving process intensification, new solvent development and a combination of both, are discussed in this paper as possible pathways for reducing the huge cost of the technology.

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Section: Commercial Deploymentmentioning

confidence: 99%

Current status and future development of solvent-based carbon capture

Oko

Wang

Joel

2017

Int J Coal Sci Technol

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“…Due to mass transer limitations, large equipment is required to treat vast volumes of flue gas [38]. Several researchers have reported the use of monoethanolamine (MEA) absorbent in carbon capture [34,39,40]. This requires high energy during regeneration [41] and reacts fast with CO 2 [42] compared to other solvents reported.…”

Section: Absorbent Selectionmentioning

confidence: 99%

Process intensification technologies for CO2 capture and conversion – a review

2020

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With the concentration of CO 2 in the atmosphere increasing beyond sustainable limits, much research is currently focused on developing solutions to mitigate this problem. Possible strategies involve sequestering the emitted CO 2 for long-term storage deep underground, and conversion of CO 2 into value-added products. Conventional processes for each of these solutions often have high-capital costs associated and kinetic limitations in different process steps. Additionally, CO 2 is thermodynamically a very stable molecule and difficult to activate. Despite such challenges, a number of methods for CO 2 capture and conversion have been investigated including absorption, photocatalysis, electrochemical and thermochemical methods. Conventional technologies employed in these processes often suffer from low selectivity and conversion, and lack energy efficiency. Therefore, suitable process intensification techniques based on equipment, material and process development strategies can play a key role at enabling the deployment of these processes. In this review paper, the cutting-edge intensification technologies being applied in CO 2 capture and conversion are reported and discussed, with the main focus on the chemical conversion methods.

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“…Due to lack of experimental data at these conditions, generating correlations from CFD simulation data could be an effective and economical alternative to meet the requirement of accurate prediction of the performance of the RPB for CO 2 capture. Among the existing correlations, the Burns correlation (Burns et al, 2000) describes the relationship between liquid holdup ( ) and the centrifugal acceleration (g), liquid superficial velocity (U) and viscosity ( ), which is concise and clear, and it has been adopted in many cases (Joel et al, 2015;Joel et al, 2014Joel et al, , 2017Kang et al, 2014;Thiels et al, 2016). Therefore, a similar expression has been adopted to regress the correlations for , A e and A s in the RPB with an expanded mesh packing based on the CFD simulation results.…”

Section: Effect Of the Contact Anglementioning

confidence: 99%

A mesoscale 3D CFD analysis of the liquid flow in a rotating packed bed

Xie

Ding

et al. 2019

Chemical Engineering Science

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Rotating packed beds (RPBs), as a type of process intensification technology, are promising to be employed as high-efficiency CO 2 absorbers. However, the detailed understanding of the liquid flow in the RPB is still very limited. The complex and dense packing of the bed and the multiscale of the RPB make it very difficult to perform numerical simulations in detail, in particular for full 3D simulations. In this paper, a mesoscale 3D CFD modelling approach is proposed which can be used to investigate the liquid flow in both laboratory-and large-scale RPBs in detail and accuracy. A 3D representative elementary unit of the RPB has been built and validated with experimental observations, and then it is employed to investigate the gas-liquid flows at different locations, across a typical RPB, so that the overall characteristics of the liquid flow in the RPB can be assembled. The proposed approach enables the detailed prediction of the liquid holdup, droplets formation, effective interfacial area, wetted packing area and specific surface area of the liquid within real 3D packing structures throughout the bed. New correlations to predict the liquid holdup, effective interfacial area, and specific surface area of the liquid are proposed, and the sensitivities of these quantities to the rotational speed, liquid flow rate, viscosity and contact angle have been investigated. The results have been compared with experimental data, previous correlations and theoretical values and it shows that the new correlations have a good accuracy in predicting these critical quantities. Further, recommendations for scale-up and operation of an RPB for CO 2 capture are provided. This proposed model leads to a much better understanding of the liquid flow behaviours and can assist in the RPB optimisation design and scaling up.

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Modelling and Design of Carbon Dioxide Absorption in Rotating Packed Bed and Packed Column

Cited by 23 publications

References 15 publications

Current status and future development of solvent-based carbon capture

Current status and future development of solvent-based carbon capture

Process intensification technologies for CO2 capture and conversion – a review

A mesoscale 3D CFD analysis of the liquid flow in a rotating packed bed

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