Two dimensional fluidised bed reactor : performance of a novel multi-vortex distributor

Show simple item record Brink, Hendrik Gideon Saayman, Jean Nicol, Willie 2012-02-16T14:37:31Z 2012-02-16T14:37:31Z 2011-11
dc.description.abstract The influence of the distributor configuration on interphase mass transfer, gas axial dispersion and bubble size was studied in a 2-D fluidised bed reactor for two types of distributor configurations; a novel multi-vortex (MV) distributor with tuyéres directed vertically and horizontally at different heights and a standard perforated plate distributor (baseline). The linear inlet velocity (U0) ranged between 0.1 m/s and 0.35 m/s, with air as fluidising medium at ambient conditions. The ozone decomposition reaction over Fe2O3 impregnated FCC catalyst was used as an indirect measure of the performance of the FBR and it was found that the MV distributor causes a significant improvement (15% average) in the conversion efficiencies at all velocities tested. Bubble size measurements (using two separate techniques) indicated larger bubbles for the MV distributor, while the visual bubbling to turbulent transition boundary (Uc) for the MV distributor was found to be lower than the baseline distributor. The interphase bubble-emulsion mass transfer was quantified using the model derived by Thompson et al. (1999) and was found to be 52% higher for the MV distributor than the baseline distributor. In addition the MV distributor exhibited near plug flow characteristics at velocities exceeding Uc, while this was not the case for the baseline distributor. en_US
dc.description.sponsorship The THRIP for the financial support. en_US
dc.description.uri en_US
dc.identifier.citation Brink, HG, Saayman, J & Nicol, W 2011, 'Two dimensional fluidised bed reactor : performance of a novel multi-vortex distributor', Chemical Engineering Journal, vol. 175, pp. 484-493. en_US
dc.identifier.issn 1385-8947 (print)
dc.identifier.issn 1873-3212 (online)
dc.identifier.other 10.1016/j.cej.2011.09.077
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights © 2011 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Chemical Engineering Journal. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering Journal, vol. 175, 2011, doi:10.1016/jj.cej.2011.09.077. en_US
dc.subject Two dimensional fluidized bed reactor en_US
dc.subject Multi-vortex distributor en_US
dc.subject Ozone decomposition reaction en_US
dc.subject Interphase mass transfer quantification en_US
dc.title Two dimensional fluidised bed reactor : performance of a novel multi-vortex distributor en_US
dc.type Postprint Article en_US

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