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A Numerical Model Simulation for an Updraft Gasifier Using High Temperature Steam

Authors: T. M. Ismail, M. Abd El-Salam

Abstract:

A mathematical model study was carried out to investigate gasification of biomass fuels using high temperature air and steam as a gasifying agent using high-temperature air up to 1000°C. In this study, a 2D computational fluid dynamics model was developed to study the gasification process in an updraft gasifier, considering drying, pyrolysis, combustion, and gasification reactions. The gas and solid phases were resolved using a Euler−Euler multiphase approach, with exchange terms for the momentum, mass, and energy. The standard k−ε turbulence model was used in the gas phase, and the particle phase was modeled using the kinetic theory of granular flow. The results show that the present model giving a promise way in its capability and sensitivity for the parameter affects that influence the gasification process.

Keywords: Computational fluid dynamics, gasification, biomass fuel, fixed bed gasifier

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1092283

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References:


[1] Y. Wu, Q. Zhang, W. Yang, W. Blasiak, Two-dimensional computational fluid dynamics simulation of biomass gasification in a downdraft fixed-bed gasifier with highly preheated air and steam, Energy &Fuels, 2013, 27, 3274−3282.
[2] W. Jangsawang, A.K. Gupta, K. Kitagawa, S.C. Lee, High temperature steam and air gasification of non woody biomass waste, As. J. Energy Env. , 2007, 8, 601-609
[3] G. Schuster, G. Löffler, K. Weigl, H. Hofbauer, Biomass steam gasification an extensive parametric modeling study, Bioresource Technology, 2001, 77, 71-79.
[4] X. Wang, B. Jin and W. Zhong, "Three-dimensional simulation of fluidized bed coal gasification, Chemical Engineering and Processing: Process Intensification, 2009, 48, 2, 695-705.
[5] M.J.V. Goldschmidt, R. Beetstra, J.A.M. Kuipers, Hydrodynamic modeling of dense gas-fluidized beds: comparison of the kinetic theory of granular flow with 3d hard-sphere discrete particle simulations, Chemical Engineering Science, 2002, 57, 2059–2075.
[6] S. Benyahia, H. Arastoopour, T.M. Knowlton, H. Massah, Simulation of particles and gas flow behavior in the riser section of a circulating fluidized bed using the kinetic theory approach for the particulate phase, Powder Technology, 2000, 112, 24–33.
[7] W. Zhong, Y. Xiong, Z. Yuan, M. Zhang, DEM simulation of gas–solid flow behaviors in spout-fluid bed, Chemical Engineering Science, 2006, 61, 1571–1584.
[8] M.J.V. Goldschmidt, R. Beetstra, J.A.M. Kuipers, Hydrodynamic modeling of dense gas-fluidized beds: comparison and validation of 3d discrete particle and continuum models, Powder Technology, 2004, 142, 23–47.
[9] J. Ding, D. Gidaspow, A bubbling fluidization model using kinetic theory of granular flow, AIChE Journal, 1990, 36, 523–538.
[10] D. Gidaspow, multiphase flowand fluidization: continuum and kinetic theory description, Academic Press, San Diego, 1994.
[11] V. Mathiesen, T. Solberg, B. H. Hjertager, An experimental and computational study of multiphase flow behavior in a circulating fluidized bed, international journal of multiphase flow, 2000, 26, 387–419.
[12] W. Zhong, M. Zhang, B. Jin, Z. Yuan, Flow behaviors of a large spout-fluid bed at high pressure and temperature by 3dsimulation with kinetic theory of granular flow, Powder Technology, 2007, 175, 90–103.
[13] L. Yu, J. Lu, X. Zhang, S. Zhang, Numerical simulation of the bubbling fluidized bed coal gasification by the kinetic theory of granular flow (KTGF), Fuel, 2007, 86, 722–734.
[14] T.M. Ismail, M. Abd El-Salam, M.A. El-Kady, S.M. El-Haggar, three dimensional model of transport and chemical late phenomena a MSW incinerator, International Journal of Thermal Sciences, 2014, 77, 139-157.
[15] W. Yang, A. Ponzio, C. Lucas, W. Blasiak , Performance analysis of a fixed-bed biomass gasifier using high-temperature air, Fuel Processing Technology, 2006, 87, 235 – 245.
[16] D. S. Gunarathne, J. K. Chmielewski, W. Yang, high temperature air/steam gasification of steam exploded biomass, International Flame Research Foundation. The Finnish and Swedish National Committees Finnish – Swedish Flame Days, 2013
[17] C. Lucas, D. Szewczyk, W. Blasiak, S. Mochida, High-temperature air and steam gasification of densified biofuels, Biomass and Bioenergy, 2004, 27, 563–575.
[18] B. Peters, N. Thomas, B. Christian. Modeling wood combustion under fixed bed conditions, Fuel, 2003, 82, 729–738.
[19] B. Tabrizi, A. Saffar, M. R. Assarie, Two-dimensional mathematical model of a packed bed dryer and experimentation, Journal of Power and Energy, 2001, 216, 161-168.
[20] Di Blasi C. Modeling wood gasification in a countercurrent fixed-bed reactor, AIChE J, 2004, 50, 9.
[21] J. Cooper, W. L. H. Hallett. A numerical model for packed-bed combustion of char particles. Chemical Engineering Science, 2000, 55, 4451–4460.
[22] Launder, b. E. and Spalding, D. B. The numerical computations of turbulent flows.1974.
[23] D. Gidaspow, A bubbling fluidization model using kinetic theory of granular flow. AIChE Journal, 1994, 32, 1, 523–538.
[24] S. Hermann, Boundary layer theory. McGraw-Hill, 1979, Seventh Edition.
[25] H. Arastoopour, Numerical simulation and experimental analysis of gas-solid flow systems: 1999 fluor-danielplenarylecture, Powder Technology, 2001, 119, 59-67.
[26] Rosseland, S., Theoretical Astrophysics: Atomic Theory and the Analysis of Stellar Atmospheres and Envelopes, Oxford, UK: Clarendon, 1936.
[27] S.V. Patankar, Numerical heat transfer and fluid flow, Hemisphere, 1980.
[28] W.Q. Tao, Numerical Heat transfer, Second Ed., Xi’an Jiaotong University, Xi’an, 2001.
[29] W. Blasiak, D. Szewczyk, C. Lucas, S. Mochida, Proceedings of 21st International Conferences on Incineration and Thermal Treatment Technologies, May 13–17, 2002, New Orleans, Louisiana, USA, 2002.