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Experimental study of a fast gas-particle separator

Andreux, Régis and Ferschneider, Gilles and Hemati, Mehrdji and Simonin, Olivier Experimental study of a fast gas-particle separator. (2007) Chemical Engineering Research and Design, vol. 8 (n° A6). pp. 808-814. ISSN 0263-8762

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Official URL: http://dx.doi.org/10.1205/cherd06154

Abstract

A horizontal rapid gas-particle separator dedicated to the Fluid Catalytic Cracking process was tested on a small scale cold Circulating Fluidized Bed. Air (density 1.2 kg/m3, dynamic viscosity 1.8×10-5 Pa.s) and typical FCC particles (density 1400 kg/m3, mean diameter 70 mm) are used. The inlet gas velocity is kept constant at 7.3 m/s while the inlet solid loading and the separator dipleg back pressure range from 0 to 16 kg/kg and 100 to 500 Pa, respectively. Solid collection efficiency and pressure drop are studied. A model based on cyclone concepts is proposed. The solid collection efficiency increases with the inlet solid loading and reaches an asymptotic value close to 95 % when the inlet loading is above 5 kg/kg. Two flow regimes are observed in the separator dipleg through the range of inlet solid loadings, related to the available flow section modification and the interstitial gas entrainment. At constant gas collection efficiency, the separator pressure drop is maximum under single-phase flow conditions and reaches a minimum when the inlet solid loading is close to 2.5. The pressure drop increases again for higher inlet solid loading. The final modeling allows good prediction of the separator operation for all inlet solid loading conditions when the gas collection efficiency is at 100 %.

Item Type:Article
Additional Information:The original publication is available on http://www.atypon-link.com/ICHEME/loi/cerd
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > IFP Energies Nouvelles - IFPEN (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By: Régis Andreux

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