CFD modelling of carbon capture in large-scale for structured packed bed column.

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dc.contributor.advisorManovic, Vasilije
dc.contributor.advisorKonozsy, Laszlo Z.
dc.contributor.advisorNavabi, Syed Ali
dc.contributor.authorHossain, Mohammad Ashraf
dc.date.accessioned2024-03-19T10:49:16Z
dc.date.available2024-03-19T10:49:16Z
dc.date.issued2021-05
dc.description.abstractIn this Ph.D. thesis, a novel 3D numerical model is developed to solve multiphase flow problem for carbon capture. The model solves the Navier-Stokes equations with commercial solver Ansys Fluent with higher accuracy and much better prediction. The proposed model was at first developed to solve the hydrodynamics problem inside the structured packed bed. In the hydrodynamic part, viscous resistance and inertia resistance for both gas and liquid were taken into account and were implemented by the User Defined Function (UDF). The structured mesh was done using ICEM-CFD. In this part, dispersion forces were also included by UDF. Hydrodynamics of the structured packed bed was validated in terms of liquid volume fraction and, a higher degree of accuracy was achieved. This achievement was done by implementing drag law in a novel way. Dispersion of the liquid inside the packed bed was modelled both by mechanical dispersion and by spread tensor. Pressure drop is a very important part of designing structured packing and, it has to be kept to a minimum. In the hydrodynamics study, this pressure drop was kept minimum, and a good distribution of gas and liquid was achieved. The second part of the model is the chemical reactions. In this case, all the five reactions that occur in carbon capture were taken into account along with the hydrodynamics. Few studies like the effect of solvent concentration, the effect of pressure were studied by using this part of the model. Another novel aspect of the model is that it can predict gas-liquid interfacial area and enhancement factor for chemical reactions. As a result, it has become much easier to understand chemical reactions and calculate carbon removal easily. The third part of the model is the heat transfer effect. Heat transfer effect was included by changing gas and liquid temperature and it was found that liquid temperature has a wider impact on carbon capture. All the contributions to the knowledge were summarized in Chapter 7.en_UK
dc.description.coursenamePhD in Energy and Poweren_UK
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/21033
dc.language.isoen_UKen_UK
dc.publisherCranfield Universityen_UK
dc.publisher.departmentSWEEen_UK
dc.rights© Cranfield University, 2020. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder.en_UK
dc.subjectmultiphase flow problemsen_UK
dc.subjectcarbon captureen_UK
dc.subjectNavier-Stokes equationsen_UK
dc.subjectAnsys Fluent solveren_UK
dc.subjecthydrodynamicsen_UK
dc.subjectviscous resistanceen_UK
dc.titleCFD modelling of carbon capture in large-scale for structured packed bed column.en_UK
dc.typeThesis or dissertationen_UK
dc.type.qualificationlevelDoctoralen_UK
dc.type.qualificationnamePhDen_UK

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