Characterization of the flow pattern in a downer reactor

Chemical Engineering Science

Volumn 54, Issue 22, 1999, Pages 5471-5483

  Lehner, P ^a   Wirth, K E ^a  

^a UNIVERSITY OF ERLANGEN NUREMBERG   (Germany)

Author keywords

Circulating fluidized bed; Downer; Fluidization; Hydrodynamics; Multiphase flow; Process tomography

Indexed keywords

COMPUTERIZED TOMOGRAPHY; FLOW OF SOLIDS; FLOW PATTERNS; FLUIDIZATION; FLUIDIZED BEDS; GLASS; GRAVITATIONAL EFFECTS; HYDRODYNAMICS; MULTIPHASE FLOW;

CIRCULATING FLUIDIZED BEDS (CFB); SUPERFICIAL GAS VELOCITY;

CHEMICAL REACTORS;

CIRCULATION; FLUIDIZATION; FLUIDIZED BED; GAS-SOLID TWO-PHASE FLOW; HYDRODYNAMICS;

EID: 0033231787     PISSN: 00092509     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0009-2509(99)00286-9     Document Type: Article

References (19)

1. Aubert, E. (1993). Hydrodynamique de Réacteur Fluidisé à Co-courant Descendant de Gaz et de Solide. Ph.D. thesis. Institut National Polytechnique de Toulouse.
2. Gartside, R. J. (1989). QC - a new reaction system. In J. R. Grace, L. W. Shemilt, & M. A. Bergougnou, Fluidization VI (pp. 25-32). New York: Engineering Foundation.
3. Gordon, R., Bender, R., & Herman, G. T. (1970). Algebraic reconstruction techniques (ART) for three-dimensional electron microscopy and X-ray photography. Journal of Theoretical Biology, 29, 471-481.
4. Grace, J. R., Avidan, A. A., Knowlton, T. M. (Eds.), 1997. Circulating Fluidized Beds. London: Blackie Academic & Professional.
5. Grace, J. R. (1990). High velocity fluidized bed reactors. Chemical Engineering Science, 45, 1953-1966.
6. Lehner, P., Richtberg, M., Wirth, K.-E. (1999). Measurement of solids velocities in a co-current gas/solids flow with a laser-doppler-anemometer and a capacitance probe system. Proceedings of CFB 6, Würzburg, in press.
7. Lehner, P., Wirth, K.-E. (1999a). Effects of the gas/solids distributor on the local and overall solids distribution in a downer reactor. Canadian Journal of Chemical Engineering, 77, 194-198.
8. Lehner, P., Wirth, K.-E. (1999b). Heat transfer in a cocurrent downflow fluidized bed. Proceedings of CFB 6, Würzburg, in press.
9. Meili, R. T. (1995). Kontinuierliche Erzeugung Homogener Gas-/feststoffsuspensionen für Effiziente Fallrohrreaktoren. VDI Fortschrittsbericht, Reihe 3, Nr. 417, VDI Verlag, Düsseldorf.
10. Schiewe, T. (1997). Untersuchungen Zum Einfluß der GutaufgabevorRichtungen Auf Die Strömungsmechanik in Fallrohrreaktoren. Ph.D. thesis. Universität Erlangen-Nürnberg.
11. Wang, Z., Bai, D. -R., & Jin, Y. (1992). Hydrodynamics of cocurrent downflow circulating fluidized bed (CDCFB). Powder Technology, 70, 271-275.
12. Wang, Z., Wei, F., Jin, Y., Yu, Z. (1996). Effect of Flow Direction on Hydrodynamics and Mixing of Circulating Fluidized Beds. Preprints CFB V, Beijing.
13. Wirth, K.-E., & Grassler, T. (1998). Radial profiles of local solids distribution in a high-loaded riser-reactor measured with X-ray computed tomography. ASME Htd-vol. 5 (pp. 445-452).
14. Wirth, K. -E., & Schiewe, T. (1998). Flow structures in a downer reactor. In L. S. Fan, & T. M. Knowlton, Fluidization IX (pp. 253-260). New York: Engineering Foundation.
15. Williams, R. A., & Beck, M. S. (1995). Process Tomography: Principles, Techniques and Applications. Oxford: Butterworth-Heinemann.
16. Zhu, J. -X., & Bi, H. -T. (1995). Distinctions between low density and high density circulating fluidized beds. Canadian Journal of ChemIcal Engineering, 73, 644-649.
17. Zhu, J. -X., & Wei, F. (1995). Recent developments of downer reactors and other types of short contact reactors. In J. F. Lafarge, & C. Laguerie, Fluidization VIII (pp. 907-914). New York: Engineering Foundation.
18. Zhu, J. -X., Yu, Z. -Q., Jin, Y., Grace, J. R., & Issangya, A. (1995). Cocurrent downflow circulating fluidized bed (downer) reactors - a state of the art review. Canadian Journal of Chemical Engineering, 73, 662-677.
19. Zierep, J. (1993). Grundzüge der Strömungslehre. Berlin: Springer Verlag.