CFD multiphase combustion modelling of oleic by-products pellets in a counter-current fixed bed combustor
A transient two-dimensional multiphase model was built to study the combustion of pellets of oleic by-products (Olive Pits (OPi)) in a cylindrical counter-current 40 kW fixed bed combustor. The fixed bed is modelled as a porous medium, which is randomly packed with spherical particles of equal size....
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| Format: | Article |
| Language: | English |
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Académie des sciences
2022-03-01
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| Series: | Comptes Rendus. Chimie |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.170/ |
| _version_ | 1797651352984223744 |
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| author | Mami, Mohamed Ali Lajili, Marzouk Echekki, Tarek |
| author_facet | Mami, Mohamed Ali Lajili, Marzouk Echekki, Tarek |
| author_sort | Mami, Mohamed Ali |
| collection | DOAJ |
| description | A transient two-dimensional multiphase model was built to study the combustion of pellets of oleic by-products (Olive Pits (OPi)) in a cylindrical counter-current 40 kW fixed bed combustor. The fixed bed is modelled as a porous medium, which is randomly packed with spherical particles of equal size. A $\kappa -\varepsilon $ model for low Reynolds number flows was used for turbulence Modelling. Primary and secondary air injections were supplied at the bed (solid phase combustion) and at the freeboard zone (gas phase combustion), respectively. The mass loss history, the temperature distribution at different heights inside the reactor and the gas emissions of CO, CO$_{2}$, O$_{2}$, H$_{2}$, CH$_{4}$ and C$_{\mathrm{org}}$ were computed. Key parameters related to the reaction front velocity, the mass conversion rate and the progress of ignition were also computed. We show that computational results are in good agreement with experimental measurements obtained using a similar reactor fed with the same pellet types. These results also motivate the implementation of the present formulation and its extension to industrial scale furnaces, having established the results for the comparison with pilot-scale experiments. |
| first_indexed | 2024-03-11T16:14:46Z |
| format | Article |
| id | doaj.art-f349b7af3a67453ba1d7fc3c9edb34b9 |
| institution | Directory Open Access Journal |
| issn | 1878-1543 |
| language | English |
| last_indexed | 2024-03-11T16:14:46Z |
| publishDate | 2022-03-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Chimie |
| spelling | doaj.art-f349b7af3a67453ba1d7fc3c9edb34b92023-10-24T14:23:23ZengAcadémie des sciencesComptes Rendus. Chimie1878-15432022-03-0125S211312710.5802/crchim.17010.5802/crchim.170CFD multiphase combustion modelling of oleic by-products pellets in a counter-current fixed bed combustorMami, Mohamed Ali0https://orcid.org/0000-0002-0379-7102Lajili, Marzouk1https://orcid.org/0000-0002-0549-7752Echekki, Tarek2https://orcid.org/0000-0002-0146-7994University of Monastir, Preparatory Institute of Engineering Studies of Monastir (IPEIM), Ionized and Reactive Media Studies Research Laboratory (EMIR), 15 Avenue Ibn El Jazzar Monastir 5019, TunisiaUniversity of Monastir, Preparatory Institute of Engineering Studies of Monastir (IPEIM), Ionized and Reactive Media Studies Research Laboratory (EMIR), 15 Avenue Ibn El Jazzar Monastir 5019, TunisiaNorth Carolina State University, Department of Mechanical & Aerospace Engineering, 1840 Entrepreneur Drive Campus Box 7910 Raleigh, NC 27695-7910, USAA transient two-dimensional multiphase model was built to study the combustion of pellets of oleic by-products (Olive Pits (OPi)) in a cylindrical counter-current 40 kW fixed bed combustor. The fixed bed is modelled as a porous medium, which is randomly packed with spherical particles of equal size. A $\kappa -\varepsilon $ model for low Reynolds number flows was used for turbulence Modelling. Primary and secondary air injections were supplied at the bed (solid phase combustion) and at the freeboard zone (gas phase combustion), respectively. The mass loss history, the temperature distribution at different heights inside the reactor and the gas emissions of CO, CO$_{2}$, O$_{2}$, H$_{2}$, CH$_{4}$ and C$_{\mathrm{org}}$ were computed. Key parameters related to the reaction front velocity, the mass conversion rate and the progress of ignition were also computed. We show that computational results are in good agreement with experimental measurements obtained using a similar reactor fed with the same pellet types. These results also motivate the implementation of the present formulation and its extension to industrial scale furnaces, having established the results for the comparison with pilot-scale experiments.https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.170/Multiphase combustionCFDPorous mediumFixed bed reactorOlive pits pelletsMultiphase combustion |
| spellingShingle | Mami, Mohamed Ali Lajili, Marzouk Echekki, Tarek CFD multiphase combustion modelling of oleic by-products pellets in a counter-current fixed bed combustor Comptes Rendus. Chimie Multiphase combustion CFD Porous medium Fixed bed reactor Olive pits pellets Multiphase combustion |
| title | CFD multiphase combustion modelling of oleic by-products pellets in a counter-current fixed bed combustor |
| title_full | CFD multiphase combustion modelling of oleic by-products pellets in a counter-current fixed bed combustor |
| title_fullStr | CFD multiphase combustion modelling of oleic by-products pellets in a counter-current fixed bed combustor |
| title_full_unstemmed | CFD multiphase combustion modelling of oleic by-products pellets in a counter-current fixed bed combustor |
| title_short | CFD multiphase combustion modelling of oleic by-products pellets in a counter-current fixed bed combustor |
| title_sort | cfd multiphase combustion modelling of oleic by products pellets in a counter current fixed bed combustor |
| topic | Multiphase combustion CFD Porous medium Fixed bed reactor Olive pits pellets Multiphase combustion |
| url | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.170/ |
| work_keys_str_mv | AT mamimohamedali cfdmultiphasecombustionmodellingofoleicbyproductspelletsinacountercurrentfixedbedcombustor AT lajilimarzouk cfdmultiphasecombustionmodellingofoleicbyproductspelletsinacountercurrentfixedbedcombustor AT echekkitarek cfdmultiphasecombustionmodellingofoleicbyproductspelletsinacountercurrentfixedbedcombustor |