Abstract
An advanced gaseous tracer technique and procedures were developed and executed to study for the first time the axial dispersion of the gas phase in a slurry bubble column reactor (SBCR) using air-C9C11-FT catalyst. Residence time distribution (RTD) curves were obtained by measuring the pulse-input’s response of the gaseous tracer. The gas phase axial dispersion coefficient (Dg) was obtained from minimum square error fit of the one-dimensional axial dispersion model to the measured tracer response data. The effects of solids loading on the axial dispersion of gas phase and the overall gas holdup have been studied. It was demonstrated that increasing solids loading improves the gas axial dispersion while decreasing the overall gas holdup. This work suggests that gas phase axial dispersion is significant in reactor performance evaluation of bubble columns or slurry bubble columns.
Acknowledgements
Authors would like to acknowledge the financial support by the members of the High-Pressure Slurry Bubble Column (HPSBC) Consortium, which are ConocoPhillips (USA), EniTecnologie (Italy), Sasol (South Africa), and Statoil (Norway). This fund provided us the financial capability to realize important research plans.
References
Abdallah, I. 2017. Experiemntal Study of Natural Convection Heat Transfer and Gaseous Dynamics from Dual-Channel Circulation Loop. Rolla, MO USA: Chemical and Biochemical Engineering Department, Missouri University of Science and Technology.Search in Google Scholar
Abdulmohsin, R.S., and M.H. Al-Dahhan. 2016. “Axial Dispersion and Mixing Phenomena of the Gas Phase in a Packed Pebble-Bed Reactor.” Annals of Nuclear Energy 88: 100–11.10.1016/j.anucene.2015.10.038Search in Google Scholar
Bloch, G., H-J. Zander, B. Wunderlich, and T. Acher. 2015. “Axial and Radial Dispersion in a Large-Diameter Bubble Column Reactor at Low Height-To-Diameter Ratio.” Chem Ing Tech 87 (6): 756–61.10.1002/cite.201400186Search in Google Scholar
Degaleesan, S., and M. P. Dudukovic. 1998. “Liquid Backmixing in Bubble Columns and the Axial Dispersion Coefficient.” AIChE Journal 44 (11): 2369–78.10.1002/aic.690441105Search in Google Scholar
Field, R. W., and J. F. Davidson. 1980. “Axial Dispersion in Bubble Columns.” Transactions of the Institution of Chemical Engineers 58 (4): 228–36.Search in Google Scholar
Han, L. 2007. Hydrodynamics, Back-Mixing, and Mass Transfer in a Slurry Bubble Column Reactor for Fischer-Tropsch Alternative Fuels. Saint Louis, Missouri: Washington University.Search in Google Scholar
Han, L., and M. Al-Dahhan Axial Dispersion of Gas Phase in Slurry Bubble Column Reactor. Paper presented at: 2005 AIChE Annual Meeting, October 2005.Search in Google Scholar
Herbolzheimer, E., and E. Iglesia. 1994. Inventors. Slurry Bubble Column. U.S. Patent 5348982. https://patents.google.com/patent/US5348982https://patentimages.storage.googleapis.com/91/04/c8/c19df657273dd0/US5348982.pdfSearch in Google Scholar
Joseph, S., Y. T. Shah, and B. G. Kelkar. 1984. “A Simple Experimental Technique to Measure Gas Phase Dispersion in Bubble Columns.” Chemical EngineeringCommunications 28 (4–6): 223–30.10.1080/00986448408940134Search in Google Scholar
Joshi, J. B. 1982. “Gas Phase Dispersion in Bubble Columns.” Chemical Engineering Journal 24 (2): 213–16.10.1016/0300-9467(82)80036-1Search in Google Scholar
Kago, T., Y. Sasaki, T. Kondo, S. Morooka, and Y. Kato. 1989. “Gas Holdup and Axial Dispersion of Gas and Liquid in Bubble Columns of Homogeneous Bubble Flow Regime.” Chemical Engineering Communications 75: 23–38.10.1080/00986448908940667Search in Google Scholar
Kantak, M. V., R. P. Hesketh, and B. G. Kelkar. 1995. “Effect of Gas and Liquid Properties on Gas Phase Dispersion in Bubble Columns.” Chemical Engineering Journal (Lausanne) 59 (2): 91–100.10.1016/0923-0467(94)02922-9Search in Google Scholar
Krishna, R., J. W. A. D. Swart, J. Ellenberger, G. B. Martina, and C. Maretto. 1997. “Gas Holdup in Slurry Bubble Columns: Effect of Column Diameter and Slurry Concentrations.” AIChE Journal 43 (2): 311–16.10.1002/aic.690430204Search in Google Scholar
Kulkarni, A., and Y. T. Shah. 1984. “Gas Phase Dispersion in a Downflow Bubble Column.” Chemical Engineering Communications 28 (4–6): 311–26.10.1080/00986448408940140Search in Google Scholar
Levenspiel, O. 1972. Chemical Reaction Engineering. New York: Wiley Eastern Press.Search in Google Scholar
Mangartz, K. H., and T. Pilhofer. 1981. “Interpretation of Mass Transfer Measurements in Bubble Columns considering Dispersion of Both Phases.” Chemical Engineering Science 36 (6): 1069–77.10.1016/0009-2509(81)80093-0Search in Google Scholar
Men’shchikov, V. A., and M. E. Aerov. 1967. “Axial Mixing of the Gas in Gas-Liquid Reactors.” Teoreticheskie Osnovy Khimicheskoi Tekhnologii 1 (6): 891–95.Search in Google Scholar
Mills, P. L., and M. P. Dudukovic. 1989. “Convolution and Deconvolution of Nonideal Tracer Response Data with Application to Three-Phase Packed Beds.” Computers & Chemical Engineering 13 (8): 881–98.10.1016/0098-1354(89)85062-8Search in Google Scholar
Mills, P. L., J. R. Turner, P. A. Ramachandran, and M. P. Dudukovic. 1996. “The Fischer-Tropsch Synthesis in Slurry Bubble Column Reactors: Analysis of Reactor Performance Using the Axial Dispersion Model.” Topics in Chemical Engineering 45 (8): 679–739.Search in Google Scholar
Ong, B. 2003. Experimental Investigation of Bubble Column Hydrodynamics – Effect of Elevated Pressure and Superficial Gas Velocity. St Louis, MO, USA: Department of Chemical Engineering, Washington University.Search in Google Scholar
Pilhofer, T., Bach, H. F., Mangartz, K. H., 1978. “Determination of fluid dynamic parameters in bubble column design.” ACS Symposium Series 65: 372–83.10.1021/bk-1978-0065.ch031Search in Google Scholar
Rados, N. H., M. Al-Dahhan, and M. P. Dudukovic. 2003. “Modeling of the Fischer-Tropsch Synthesis in Slurry Bubble Column Reactors.” Catalysis Today 79 (80): 211–18.10.1016/S0920-5861(03)00007-5Search in Google Scholar
Shaikh, A. H., and M. Al-Dahhan. 2007. “A Review on Flow Regime Transition in Bubble Columns.” International Journal of Chemical Reactor Engineering 5 (1): 1–68. DOI: 10.2202/1542-6580.1368.10.2202/1542-6580.1368Search in Google Scholar
Shetty, S. A., M. V. Kantak, and B.G. Kelkar. 1992. “Gas-Phase Backmixing in Bubblecolumn Reactors.” AIChE Journal 38 (7): 1013–26.10.1002/aic.690380705Search in Google Scholar
Sivaiah, M., and S. K. Majumder. 2013. “Dispersion Characteristics of Liquid in a Modified Gas-Liquid-Solid Three-Phase Downflow Bubble Column.” Particulate Science and Technology 31 (3): 210–20.10.1080/02726351.2012.694400Search in Google Scholar
Song, H. S., D. Ramkrishna, S. Trinh, R. L. Espinoza, and H. Wright. 2003. “Multiplicity and Sensitivity Analysis of Fischer-Tropsch Bubble Column Slurry Reactors: Plug-Flow Gas and Well-Mixed Slurry Model.” Chemical Engineering Science 58 (12): 2759–66.10.1016/S0009-2509(03)00125-8Search in Google Scholar
Stern, D., A. T. Bell, and H. Heinemann. 1983. “Effects of Mass Transfer on the Performance of Slurry Reactors Used for Fischer-Tropsch Synthesis.” Chemical Engineering Science 38 (4): 597–605.10.1016/0009-2509(83)80119-5Search in Google Scholar
Stern, D., A. T. Bell, and H. Heinemann. 1985. “Experimental and Theoretical Studies of Fischer-Tropsch Synthesis over Ruthenium in a Bubble-Column Reactor.” Chemical Engineering Science 40 (10): 1917–24.10.1016/0009-2509(85)80128-7Search in Google Scholar
Steynberg, A. P. 2004. Fischer-Tropsch Technology. Amsterdam, Netherland: Elsevier.10.1016/S0167-2991(04)80458-0Search in Google Scholar
Towell, G. D., and G. H. Ackermann. 1972. “Axial Mixing of Liquid and Gas in Large Bubble Reactors.” In Proc. 5th European-2nd Internation Symposium on Chemical Reaction Engineering, Amsterdam.Search in Google Scholar
Turner, J. R., and P. L. Mills. 1990. “Comparison of Axial Dispersion and Mixing Cell Models for Design and Simulation of Fischer-Tropsch Slurry Bubble Column Reactors.” Chemical Engineering Science 45 (8): 2317–24.10.1016/0009-2509(90)80111-QSearch in Google Scholar
Vuuren, D. S. V., and M. D. Heydenrych. 1985. Multicomponent Modeling of Fischer-Tropsch Slurry Reactors. Chemical Engineering Research Group (CSIR) Report CENG 581. Pretoria, South Africa.Search in Google Scholar
Wachi, S., and Y. Nojima. 1990. “Gas-Phase Dispersion in Bubble Columns.” Chemical Engineering Science 45 (4): 901–05.10.1016/0009-2509(90)85012-3Search in Google Scholar
Xie, G., and X. Li. 2004. “An Axial Dispersion Model for Evaporating Bubble Column Reactor.” Chinese Journal of Chemical Engineering 12 (2): 214–20.Search in Google Scholar
Xue, J. 2004. Bubble Velocity, Size and Interfacial Area Measurements in Bubble Columns. St Louis, MO, USA: Department of Chemical Engineering, Washington University.Search in Google Scholar
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Articles in the same Issue
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Articles in the same Issue
- Articles
- Hydrogen Generation in an Annular Micro-Reactor: an Experimental Investigation of Water Splitting Reaction Using Aluminum in Presence of Potassium Hydroxide
- Gas Phase Back-Mixing in a Mimicked Fischer-Tropsch Slurry Bubble Column Using an Advanced Gaseous Tracer Technique
- Influence of Pressure on Fundamental Characteristics in Gas Fluidized Beds of Coarse Particle
- Three- Dimensional Hydromagnetic Convective Flow of Chemically Reactive Williamson Fluid with Non-Uniform Heat Absorption and Generation
- Signal Synthesis Model Reference Adaptive Controller with Artificial Intelligent Technique for a Control of Continuous Stirred Tank Reactor
- Effect of Natural and Artificial Light on Fe(III) Organic Complexes Photolysis: Case of Fe (III)-Malonate and Fe(III)-Malate
- Detection of Agglomeration by Analysis of Vibration Signatures in a Pilot-Scale Fluidized Bed Reactor of Propylene Polymerization
- Methanol to Gasoline Conversion over CuO/ZSM-5 Catalyst Synthesized Using Sonochemistry Method
- Degradation of Sulfamethoxazole by Electrochemically Activated Persulfate Using Iron Anode
- Electrosorption of Methylene Blue from Aqueous Solution on Graphene-Titanium Electrode: Adsorption Kinetics Studies