Experimental study of high-density gas-solids flow in a new coupled circulating fluidized bed

Powder Technology

Volumn 139, Issue 3, 2004, Pages 214-220

  Li, Z Q ^a   Wu, C N ^a   Wei, F ^a   Jin, Y ^a  

^a TSINGHUA UNIVERSITY   (China)

Author keywords

Coupled circulating fluidized bed; Downer; High circulation flux; Riser; Solids holdup

Indexed keywords

FLUID CATALYTIC CRACKING; PARTICLE ACCELERATORS; POWDERS; PRESSURE EFFECTS;

FLUIDIZED CATALYTIC CRACKING (FCC); GAS-SOLIDS FLOW; PARTICLE SUSPENSION DENSITY;

FLUIDIZED BEDS;

EXPERIMENTAL STUDY; GAS-SOLID FLUIDIZED BED; GAS-SOLID TWO-PHASE FLOW; HOLD-UP;

AIR; ARTICLE; CATALYSIS; DENSITY; FLUIDIZED BED; GAS FLOW; SOLID; SUSPENDED PARTICULATE MATTER;

EID: 1242270630     PISSN: 00325910     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.powtec.2003.12.005     Document Type: Article

References (23)

1. Patience G.S., Chaouki J., Berruti F., Wong R. Scaling considerations for circulating fluidized bed risers. Powder Technology. 72:1992;31-37.
2. Reh L. New and efficient high-temperature processes with circulating fluidized bed reactors. Chemical Engineering & Technology. 18:1995;75-89.
3. Jin Y., Zhu J.X., Wang Z.W., Yu Z.Q. Fluidization Engineering Principles. 2001;Tsinghua Univ. Press, Beijing.
4. Avidan A.A., Edwards M., Owen H. Innovative improvement highlight FC's past and future. Oil & Gas Journal. 88:1990 (Jan. 8);33-58.
5. Reh L. Challenges of circulating fluid-bed reactors in energy and raw materials industries. Chemical Engineering Science. 54:1999;5359-5368.
6. Shan H.H., Dong H.J., Zhang J.F., Niu G.L. Experimental study of two-stage riser FCC reactions. Fuel. 80:2001;1179-1185.
7. Issangya A.S., Bai D., Bi H.T., Lim K.S., Zhu J., Grace J.R. Suspension densities in a high density circulating fluidized bed riser. Chemical Engineering Science. 54:1999;5451-5460.
8. Contractor R., Dry R.J., White C., Mao Q.M., Konstantinidis S., Potter O.E. Circulating fluidized beds - diameter, solids hold-up, axial gas-mixing, and contact efficiency. Powder Technology. 111:2000;132-144.
9. Issangya A.S., Grace J.R., Bai D.R., Zhu J.X. Further measurements of flow dynamics in a high-density circulating fluidized bed riser. Powder Technology. 111:2000;104-113.
10. Pärssinen J.H., Zhu J.X. Particle velocity and flow development in a long and high-flux circulating fluidized bed riser. Chemical Engineering Science. 56:2001;5295-5303.
11. Deng R., Wei F., Liu T. Radial behavior in riser and downer during the FCC process. Chemical Engineering and Processing. 41:2001;259-266.
12. Harris B.J., Davison J.F., Xue Y. Axial and radial variation of flow in circulating fluidized bed risers. Avidan A.A. Circulating Fluidized Bed Technology IV. 1994;103-110 AIChE, New York.
13. Wei F., Wan X., Hu Y., Wang Z., Yang Y., Jin Y. A pilot plant study and 2-D dispersion-reactor model for a high-density riser reactor. Chemical Engineering Science. 56:2001;613-620.
14. Zhu J.X., Wei F. Cocurrent gas-solid downflow fluidized bed (downer) reactors II hydrodynamics. Chemical Reaction Engineering and Technology (China). 12:1996 (Mar.);323-335.
15. Johnston P.M., de. Lasa H.I., Zhu J.X. Axial flow structure in the entrance region of a downer fluidized bed: effects of the distributor design. Chemical Engineering Science. 54:1999;2161-2173.
16. Lehner P., Wirth K.E. Characterisation of the flow pattern in a downer reactor. Chemical Engineering Science. 54:1999;5471-5483.
17. Zhang H., Zhu J.X., Bergougnou M.A. Hydrodynamics in downflow fluidized beds (1): solids concentration profiles and pressure gradient distributions. Chemical Engineering Science. 54:1999;5461-5470.
18. Zhang H., Zhu J.X. Hydrodynamics in downflow fluidized beds (2): particle velocity and solids flux profiles. Chemical Engineering Science. 55:2000;4367-4377.
19. Gartside R.J. Grace J.R., Shemilt L.W., Bergougnou M.A. QC - A New Reaction System. 1989;25-32 Fluidization VI Engineering Floundation, New York.
20. Zhao W.F. Progress in catalytic cracking reaction technology. Petroleum Processing and Petrochemicals (China). 27:1996 (Feb.);12-17.
21. R.S. Deng, Experiments and Simulation on the Hydrocarbons Cracking Processes in a Downer Reactor, Ph.D Dissertation, Tsinghua University, Beijing, China, 2001.
22. Herbert P.M., Gauthier T.A., Briens C.L., Bergougnou M.A. Flow study of a 0.05 m diameter downflow circulating fluidized bed. Powder Technology. 96:1998;255-261.
23. Liu W., Luo K.B., Zhu J.X., Beeckmans J.M. Characterization of high-density gas-solids downward fluidized flow. Powder Technology. 115:2001;27-35.