Effects of process configurations for combination of rotating packed bed and packed bed on CO2 capture

Yu, Cheng-Hsiu; Chen, Ming‐Tsz; Chen, Hao; Tan, Chung‐Sung

doi:10.1016/j.apenergy.2016.05.044

Cited by 27 publications

(12 citation statements)

References 46 publications

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“…However, high MEA concentration imposes a greater corrosion risk, hence it is necessary to optimise this or develop less corrosive absorbents. Modifications of conventional absorbents through combination of common amines [44][45][46] and introduction of porous materials [47] have been reported to enhance CO 2 absorption. Combination of amines is aimed at harnessing the advantages of individual amine and supressing their disadavantages.…”

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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Section: Absorbent Selectionmentioning

confidence: 99%

Process intensification technologies for CO2 capture and conversion – a review

2020

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“…The towers can be operated in multiples either themselves or in combination with conventional packed towers and in different configurations, namely series and parallel. Yu et al . studied this system for a flue gas with 10%vol.…”

Section: Post‐combustion Co2 Capture In Gas‐fired Systemsmentioning

confidence: 99%

“…95,96 The towers can be operated in multiples either themselves or in combination with conventional packed towers and in different configurations, namely series and parallel. Yu et al 97 studied this system for a flue gas with 10%vol. CO 2 , and indicated that a configuration with two rotating packed beds in series gives the highest performance and can decrease regeneration energy by 9.5% due to the increase in the solvent rich loading.…”

Section: Process Optimizationmentioning

confidence: 99%

Making gas‐CCS a commercial reality: The challenges of scaling up

et al. 2017

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Significant reductions in CO 2 emissions are required to limit the global temperature rise to 2°C. Carbon capture and storage (CCS) is a key enabling technology that can be applied to power generation and industrial processes to lower their carbon intensity. There are, however, several challenges that such a method of decarbonization poses when used in the context of natural gas (gas-CCS), especially for solvent-based (predominantly amines) post-combustion capture. These are related to: (i) the low CO 2 partial pressure of the exhaust gases from gas-fired power plants (ß3-4%vol. CO 2 ), which substantially limits the driving force for the capture process; (ii) their high O 2 concentration (ß12-13%vol. O 2 ), which can degrade the capture media via oxidative solvent degradation; and (iii) their high volumetric flow rates, which means large capture plants are needed. Such post-combustion gas-CCS features unavoidably lead to increased CO 2 capture costs. This perspective aims to summarize the key technologies used to overcome these as a priority, including supplementary firing, humidified systems, exhaust gas recirculation and selective exhaust gas recirculation. These focus on the maximum CO 2 levels achievable for each, as well as the electrical efficiencies attainable when the capture penalty is taken into account. Oxy-turbine cycles are also discussed as an alternative to post-combustion gas-CCS, indicating the main advantages and limitations of these systems together with the expected electrical efficiencies. Furthermore, we consider the challenges for scaling-up and deployment of these technologies at a commercial level to enable gas-CCS to play a crucial role in a low-carbon future. C

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“…packed columns), is limited by the relatively slow mass transfer process (Biliyok et al, 2012). Therefore, the RPB has the potential to replace the packed columns in the PCC process to achieve a higher mass transfer efficiency, less equipment footprint, less equipment investment, and it can deal with highconcentrated amine-based solvents more efficiently (Jassim et al, 2007;Wang et al, 2015;Yu et al, 2016;Zhao et al, 2014).…”

Section: Introduction Of the Rpb And Its Investigationmentioning

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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Effects of process configurations for combination of rotating packed bed and packed bed on CO2 capture

Cited by 27 publications

References 46 publications

Process intensification technologies for CO2 capture and conversion – a review

Process intensification technologies for CO2 capture and conversion – a review

Making gas‐CCS a commercial reality: The challenges of scaling up

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

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