Measurements of Radial Velocity in Fixed Fluidized Bed for Fischer-Tropsch Synthesis Using LDV
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Measurements of Radial Velocity in Fixed Fluidized Bed for Fischer-Tropsch Synthesis Using LDV

Authors: Xiaolai Zhang, Haitao Zhang, Qiwen Sun, Weixin Qian, Weiyong Ying

Abstract:

High temperature Fischer-Tropsch synthesis process use fixed fluidized bed as a reactor. In order to understand the flow behavior in the fluidized bed better, the research of how the radial velocity affects the entire flow field is necessary. Laser Doppler Velocimetry (LDV) was used to study the radial velocity distribution along the diameter direction of the cross-section of the particle in a fixed fluidized bed. The velocity in the cross-section is fluctuating within a small range. The direction of the speed is a random phenomenon. In addition to r/R is 1, the axial velocity are more than 6 times of the radial velocity, the radial velocity has little impact on the axial velocity in a fixed fluidized bed.

Keywords: LDV, fixed fluidized bed, velocity, Fischer-Tropsch synthesis.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1108995

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[1] Atwood H E, Bennett C. O., "Kinetics of the Fischer-Tropsch reaction over iron," in 1979 Ind Eng Chem Proc Des Dev, vol.18, pp. 163-170.
[2] Wang Y N, Xu Y Y, and Li Y W, "Heterogeneous modeling for fixed-bed Fischer-Tropsch synthesis: reactor model and its applications," in 2003 vol.58, Chem Eng Sci, pp. 867-875.
[3] G Ttel R., Turek T., "Comparison of different reactor types for low temperature Fischer-Tropsch synthesis: a simulation study," in 2009 vol.64, Chem Eng Sci, pp. 955-964.
[4] Marvast M. A., Sohrabi M., and Zarrinpashne S., "Fischer-Tropsch synthesis: modeling and performance study for Fe-HZSM5 bifunctional catalyst," in 2005 vol.28 ChemEng Technol., pp. 78-86.
[5] Wu J, Zhang H, and Ying W, "Simulation and analysis of a tubular fixed-bed Fischer-Tropsch synthesis reactor with Co-based catalyst," in 2010 vol.33, ChemEngTechnol, pp. 1083-1092.
[6] K. Tomishige, "Syngas production from methane reforming with CO2/H2O and O2 over NiO–MgO solid solution catalyst in fluidized bed reactors," in 2004 vol.89, Catal Today, pp. 405-418.
[7] Y. S. Teplitskiy, "Similarity of transport processes in fluidized beds," in 1999 vol.42, Int. J. Heat Mass Transfer, pp. 3887-3899.
[8] C. B. Solnordal, K.J. Reid, "Modeling coke distribution above the freeboard of a fluid coking reactor," in 2012 vol.51, Ind. Eng. Chem. Res., pp. 15337-15350.
[9] É. Guazzelli, J.Hinch, "Fluctuations and instability in sedimentation," in 2011 vol.43, Annu. Rev. Fluid Mech, pp. 97-116.
[10] L. Pietri, M. Amielh, and F. Anselmet, "Simultaneous measurements of temperature and velocity fluctuations in a slightly heated jet combining a cold wire and Laser Doppler Anemometry," in 2000 vol.21, International Journal of Heat and Fluid Flow, pp. 22-36.
[11] N. Pedersen, P. S Larsen, and C. B Jacobsen, "Flow in a Centrifugal Pump Impeller at Design and Off-Design Conditions—Part I: Particle Image Velocimetry (PIV) and Laser Doppler Velocimetry (LDV) Measurements," in 2003, ASME J. Fluids Eng., pp. 61-72.
[12] J. Werther, B. Hage, and C. Rudnick, "A comparison of laser Doppler and single-fiber reflection probes for the measurement of the velocity of solids in a gas–solid circulating fluidized bed," in 1996 vol.35 Chemical Engineering and Processing., pp. 381-391.
[13] A. G. Mychkovsky, N. A. Chang, S. L. Ceccio, "Bragg cell laser intensity modulation: effect on laser Doppler velocimetry measurements," in 2009 vol.48, Applied Optics, pp. 3468-3474.
[14] J. Adanez, J. C. Abanades, "Minimum fluidization velocities of fluidized-bed coal-combustion solids," in 1991 vol.67, Powder Technology., pp. 113-119.
[15] K. Obha, Y. Tsutomu, H. Matsuyama, "Simultaneous measurements of bubble and liquid velocities in two-phase flow using LDV," in 1991 vol.29, Bulletin of JSME., pp. 2487-2493.
[16] C. Chatzidoukas, J. D. Perkins, E. N. Pistikopoulos, and C. Kiparissides, "Optimal grade transition and selection of closed-loop controllers in a gas-phase olefin polymerization fluidized bed reactor," in 2003 vol.58, Chemical Engineering Science., pp. 3643-3658.
[17] R. W. Breault, C. P. Guenther, and L. J. Shadle, "Velocity fluctuation interpretation in the near wall region of a dense riser," in 2008, Powder Technology, pp. 137-145.