Frontiers of Chemical Science and Engineering >
Experimental study on bubble behavior and CFD simulation of large-scale slurry bubble column reactor
Received date: 28 Jan 2010
Accepted date: 11 May 2010
Published date: 05 Dec 2010
Copyright
Slurry bubble column reactors (SBCR) is a three-phase fluidized reactor with outstanding advantages compared with other reactors and is difficult to scale-up due to lack of information on hydrodynamics and mass transfer over a wide range of operating conditions of commercial interest. In this paper, an experiment was conducted to investigate the bubble behavior in SBCR with a height of 5600 mm and an interior diameter of 480 mm. Bubble rise velocity, bubble diameter, and gas holdup in different radial and axial positions are measured in SBCR using four-channel conductivity probe. Tap water, air, and glass beads (mean diameter 75–150 μm) are used as liquid, gas, and solid phases, respectively. It shows that hydrodynamic parameters have good regularity in SBCR. Moreover, a commercial computational fluid dynamics (CFD) package, Fluent, was used to simulate the process in SBCR. The simulations were carried out using axi-symmetric 2-D grids. Data obtained from experiment and CFD simulation are compared, and results show that the tendency of simulation is almost uniform with the experiment, which can help to obtain further understanding about multiphase flow process and establish a model about the synthesis of alcohol ether fuel in SBCR.
Key words: SBCR; four-channel conductivity probe; hydrodynamics; CFD
Haoyi SUN , Tao LI , Weiyong YING , Dingye FANG . Experimental study on bubble behavior and CFD simulation of large-scale slurry bubble column reactor[J]. Frontiers of Chemical Science and Engineering, 2010 , 4(4) : 515 -522 . DOI: 10.1007/s11705-010-0516-7
1 |
Nambiar D K R, Kumar R, Das T R, Gandhi K S. A new model for the breakage frequency of drops in turbulent stirred dispersions. Chemical Engineering Science, 1992, 47(12): 2989–3002
|
2 |
Randolph A D. A population balance for countable entities. Canadian Journal of Chemical Engineering, 1964, 42: 280–28l
|
3 |
Cents A H G, Jansen D J W, Brilman D W F, Versteeg G F. Influence of small amounts of additives on gas hold-up, bubble size, and interfacial area. Industrial & Engineering Chemistry Research, 2005, 44(14): 4863–4870
|
4 |
Wang T F, Wang J F, Ren F, Jin Y. Application of doppler ultrasound velocimetry in multiphase flow. Chemical Engineering Journal, 2003, 92(1-3): 111–122
|
5 |
Zhang K, Zhao Y, Zhang B. Hydrodynamic behavior in a tapered bubble column. Chemical Research in Chinese Universities, 2004, 20(4): 478–482 (in Chinese)
|
6 |
Fredrickson A G, Tsuchiya H M. Continuous propagation of micro-organisms. AIChE Journal. American Institute of Chemical Engineers, 1963, 9(4): 459–468
|
7 |
Utomo M B, Sakai T, Uchida S. Use of neural network-ultrasonic technique for measuring gas and solid hold-ups in a slurry bubble column. Chemical Engineering & Technology, 2002, 25(3): 293
|
8 |
Weinstein H, Shao M, Schnitzlein M. Radial variation in solid density in high velocity fluidization. In: Basu P, ed. Circulating Fluidized Bed Technology. Oxford: Pergamon Press, 1986, 201–206
|
9 |
Vandu C O, Koop K, Krishna R. Large bubble sizes and rise velocities in a bubble column slurry reactor. Chemical Engineering & Technology, 2004, 27(11): 1195–1199
|
10 |
Heard W B, Richter G R. Computational fluid dynamics in chemical reaction engineering. United Engineering Foundation, San Diego, 1996, 106–110
|
11 |
Thompson T. Vision 2020 comes into focus: the multiphase fluid dynamics research consortium. C & EN News, 1999, 185–190
|
12 |
Pan Y, Dudukovic M P, Chang M. Numerical investigation of gas-driven flow in 2-D bubble columns. AIChE Journal. American Institute of Chemical Engineers, 2000, 46(3): 434–449
|
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