Modelling and simulation of intensified absorber for post-combustion CO2 capture using different mass transfer correlations

Joel, Atuman Samaila; Wang, Meihong; Ramshaw, Colin

doi:10.1016/j.applthermaleng.2014.02.064

Cited by 43 publications

(40 citation statements)

References 32 publications

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“…Kang et al (2014 and modelled the RPB absorber in gPROMS ® . Joel et al (2014Joel et al ( , 2015 and 2017) simulated RPB absorber and stripper in ASPEN PLUS ® by using FORTRAN ® routines to insert some correlations that were not available in ASPEN PLUS ® . The results of these studies are valuable and different aspects of RPB system were studied.…”

Section: Review Of Previous Studies On Rpb Absorber Modellingmentioning

confidence: 99%

Process modelling and analysis of intensified CO2 capture using monoethanolamine (MEA) in rotating packed bed absorber

Borhani

Oko

Wang

2018

Journal of Cleaner Production

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Rotating packed bed (RPB) absorber using monoethanolamine (MEA) as the solvent to capture CO2 is modelled at steady state condition in this study according to the first principles in gPROMS ®. The effect of eight different kinetic reaction models and five enhancement factors is examined based on the newly developed model. Selection of kinetic model has significant effect on the carbon capture level (CCL) but the effect of enhancement factor relation is not important. The steady state process model is validated against the experimental data and showed good agreement. The average absolute relative deviation for 12 case-runs is 3.5%. In addition, process analysis is performed to evaluate the effect of four factors namely rotor speed, MEA concentration in lean MEA solution, lean MEA solution temperature and lean MEA solution flow rate on CCL. Finally, orthogonal array design (OAD) method is applied to analyse the simultaneous effect of the above-mentioned factors in the CCL and motor power of RPB absorber by considering 25 scenarios. The result of using OAD revealed that rotor speed has the most important effect on CCL, and after that lean MEA solution flow rate has the second importance. In addition, the OAD method is used to find the proper combination of four factors that resulted in about 90% CCL with low motor power.

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Section: Review Of Previous Studies On Rpb Absorber Modellingmentioning

confidence: 99%

Process modelling and analysis of intensified CO2 capture using monoethanolamine (MEA) in rotating packed bed absorber

Borhani

Oko

Wang

2018

Journal of Cleaner Production

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“…The correlation was found to be valid for different sizes of the RPBs and for viscous Newtonian and non-Newtonian fluids. Because of these advantages, Equation 16 is selected for calculating the liquid phase mass transfer coefficient, and also findings from Joel et al [22] suggested the use of Equation 16…”

Section: Gas and Liquid Phase Energy Balancesmentioning

confidence: 99%

“…Study of intensified absorber was reported in Joel et al [21,22] and Agarwal et al [23]. Joel et al [21] reported 12 times volume reduction for absorber if using RPB technology as compared to packed column.…”

Section: Introductionmentioning

confidence: 99%

Modelling, simulation and analysis of intensified regenerator for solvent based carbon capture using rotating packed bed technology

et al. 2017

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Intensified regenerator/stripper using rotating packed bed (RPB) for regeneration of rich-MEA solvent in post-combustion CO2 capture with chemical absorption process was studied through modelling and simulation in this paper. This is the first systematic study of RPB regenerator through modelling as there is no such publication in the open literature. Correlations for liquid and gas mass transfer coefficients, heat transfer coefficient, liquid holdup , interfacial area and pressure drop which are suitable for RPB regenerator were written in visual FORTRAN as subroutines and then dynamically linked with Aspen Plus ® rate-based model to replace the default mass and heat transfer correlations in the Aspen Plus ®. The model now represents intensified regenerator/stripper. Model validation shows good agreement between model predictions and experimental data from literature. Process analyses were performed to investigate the effect of rotor speed on the regeneration efficiency and regeneration energy (including motor power). The rotor speed was varied from 200 to 1200 rpm, which was selected to cover the validation range of rotor speed. Impact of reboiler temperature on the rate of CO2 stripping was also investigated. Effect of rich-MEA flow rate on regeneration energy and regeneration efficiency was studied. All the process analyses were done for wide range of MEA concentration (32.6 wt%, 50 wt% and 60 wt%). Comparative study between regenerator using packed column and intensified regenerator using RPB was performed and the study shows a size reduction of 9.691 times. This study indicates that RPB process has great potential in thermal regeneration application.

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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 simulation of intensified absorber for post-combustion CO2 capture using different mass transfer correlations

Cited by 43 publications

References 32 publications

Process modelling and analysis of intensified CO2 capture using monoethanolamine (MEA) in rotating packed bed absorber

Process modelling and analysis of intensified CO2 capture using monoethanolamine (MEA) in rotating packed bed absorber

Modelling, simulation and analysis of intensified regenerator for solvent based carbon capture using rotating packed bed technology

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

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