dc.contributor.author | Agu, Cornelius Emeka | |
dc.contributor.author | Tokheim, Lars-André | |
dc.contributor.author | Eikeland, Marianne Sørflaten | |
dc.contributor.author | Moldestad, Britt Margrethe Emilie | |
dc.date.accessioned | 2019-02-14T10:27:22Z | |
dc.date.available | 2019-02-14T10:27:22Z | |
dc.date.created | 2018-11-29T17:57:23Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Chemical engineering research & design. 2018, 141, 361-371. | nb_NO |
dc.identifier.issn | 0263-8762 | |
dc.identifier.uri | http://hdl.handle.net/11250/2585418 | |
dc.description | Published by Elsevier B.V.on behalf of Institution of Chemical Engineers. This is an open access article under the CC BY license. | nb_NO |
dc.description.abstract | An efficient design and operational control of a fluidized bed reactor relies on accurate prediction of bubble properties. This paper employs measurement of bed void fraction in determining the bubble velocity in a given bed. An analytical model is developed for bubble rise velocity, which shows that the rise velocity of a single bubble is proportional to the rate of change of the bubble-projected area. Based on the model for bubble rise velocity, a correlation for bubble velocity is obtained as given by
Bubble frequency is also modelled and presented as , and bed expansion due to bubble flow in a larger particle bed (Ar ≥ 400) is modelled by . The three models have been validated against experimental data and the results show that the bubble velocity model has a better prediction accuracy than the existing models for Geldart B and D particles with prediction errors of 15.5% and 12.0%, respectively. The results also show that the proposed bed expansion model predicts better than the existing models in the literature. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Improved Models for Predicting Bubble Velocity, Bubble Frequency and Bed Expansion in a Bubbling Fluidized Bed | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.rights.holder | ©2018 The Author(s). | nb_NO |
dc.source.pagenumber | 361-371 | nb_NO |
dc.source.volume | 141 | nb_NO |
dc.source.journal | Chemical engineering research & design | nb_NO |
dc.identifier.doi | 10.1016/j.cherd.2018.11.002 | |
dc.identifier.cristin | 1637175 | |
cristin.unitcode | 222,58,3,0 | |
cristin.unitname | Institutt for prosess-, energi- og miljøteknologi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |