Micro-scale CFD modeling of reactive mass transfer in falling liquid films within structured packing materials

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dc.contributor.authorSebastia-Saez, Daniel
dc.contributor.authorGu, Sai
dc.contributor.authorRanganathan, Panneerselvam
dc.contributor.authorPapadikis, Konstantinos
dc.date.accessioned2016-02-22T12:19:53Z
dc.date.available2016-02-22T12:19:53Z
dc.date.issued2015-02
dc.description.abstractPost-combustion carbon capture in structured packing columns is considered as a promising technology to reduce greenhouse gas (GHG) emissions because of its maturity and the possibility of being retrofitted to existing power plants. CFD plays an important role in the optimization of this technology. However, due to the current computational capacity limitations, the simulations need to be divided into three scales (i.e. micro-, meso- and macro-scale) depending on the flow characteristics to be analyzed. This study presents a 3D micro-scale approach to describe the hydrodynamics and reactive mass transfer of the CO2-MEA chemical system within structured packing materials. Higbie's penetration theory is used to describe the mass transfer characteristics whereas enhancement factors are implemented to represent the gain in the absorption rate attributable to the chemical reaction. The results show a detrimental effect of the liquid load on the absorption rate via a decrease in the enhancement factor. The evolution of the wetted area for MEA solutions is compared to the case of pure water highlighting the differences in the transient behavior. The CO2 concentration profiles are examined showing the capability of the model to reproduce the depletion of the solute within the bulk liquid ascribed to the high value of the Hatta number. Also, several approaches on the reaction mechanism such as reversibility and instantaneous behavior are assessed. The results from micro-scale are to be used in meso-scale analysis in future studies to optimize the reactive absorption characteristics of structured packing materials.en_UK
dc.identifier.citationDaniel Sebastia-Saez, Sai Gu, Panneerselvam Ranganathan, Konstantinos Papadikis, Micro-scale CFD modeling of reactive mass transfer in falling liquid films within structured packing materials, International Journal of Greenhouse Gas Control, Volume 33, February 2015, Pages 40-50en_UK
dc.identifier.issn1750-5836
dc.identifier.issn1750-5836
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/9720
dc.identifier.urihttp://dx.doi.org/10.1016/j.ijggc.2014.11.019
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 3.0 Unported (CC BY 3.0). Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
dc.subjectVOFen_UK
dc.subjectStructured packingen_UK
dc.subjectCarbon captureen_UK
dc.subjectCFDen_UK
dc.subjectReactive mass transferen_UK
dc.titleMicro-scale CFD modeling of reactive mass transfer in falling liquid films within structured packing materialsen_UK
dc.typeArticleen_UK

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