Eulerian-Lagrangian model of the fluidized-bed gasification process
DOI:
https://doi.org/10.17981/ingecuc.16.1.2020.012Keywords:
fluidized bed, CFD, eulerian, lagrangian, gasificationAbstract
Introduction: In fluidized bed gasification processes, it is important to evaluate the behavior of pressure parameters, temperature, gas composition, characteristics of the material to be gasified, oxidant flow, among other parameters. To carry out this evaluation quickly, the use of computational fluid dynamics modeling is one of the most powerful tools. The solid and gaseous phases of gasification can be estimated using a Lagrangian and Eulerian model respectively.
Objective: To develop a model using computational fluid dynamics to evaluate the behavior of the gasification process in a fluidized bed.
Method: From the literature review, the geometry of the reactor to be modeled, the operating conditions and the material to be gasified were selected. The model developed with the STAR CCM+ software, the equations that govern the behavior of the process, the mesh and time independence studies, among other parameters of interest, are described in detail.
Results: The model developed was validated with data reported in the literature by direct comparison of the concentrations of the gas obtained when air was used as an oxidizing agent, as well as showing the concentration of the gas obtained throughout the reactor for times of interest.
Conclusions: From the results obtained, a good approximation was achieved with what is reported in the literature, which allows evidencing the validity of the model developed. The sub-models used in this work differ from those reported by [1], so some differences are obtained in the molar fractions of the species obtained, however the model adequately predicts the behavior of the process.
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References
M. Thakare & A.A.Nene, “Eulerian-Lagrangian CFD modeling of coal gasification,” IERJ, Sp. Ed., pp. 1–9, Jun. 2017.
M. La Villetta, M. Costa & N. Massarotti, “Modelling approaches to biomass gasification: A review with emphasis on the stoichiometric method,” Renew. Sustain. Energy Rev., vol. 74, pp. 71–88, Jul. 2017. https://doi.org/10.1016/j.rser.2017.02.027
A. Franco & A. R. Diaz, “The future challenges for ‘clean coal technologies’: Joining efficiency increase and pollutant emission control,” Energy, vol. 34, no. 3, pp. 348–354, Mar. 2009. https://doi.org/10.1016/j.energy.2008.09.012
G. G. Sáinz, “Estudio experimental de la co- gasificación de fangos de EDAR y carbón con aire en lecho fluidizado,” Ph. D Thesis, UNIZAR, Zaragoza, ES, 2013.
J. Xie, W. Zhong, B. Jin, Y. Shao & Y. Huang, “Eulerian-Lagrangian method for three-dimensional simulation of fluidized bed coal gasification,” Adv. Powder Technol., vol. 24, no. 1, pp. 382–392, Jan. 2013. https://doi.org/10.1016/j.apt.2012.09.001
A. Ocampo, E. Arenas, F. Chejne, J. Espinel, C. Londoño, J. Aguirre, J. D. Perez, “An experimental study on gasification of Colombian coal in fluidised bed,” Fuel, vol. 82, no. 2, pp. 161–164, Jan. 2003. https://doi.org/10.1016/S0016-2361(02)00253-3
R. K. Thapa, C. Pfeifer & B. M. Halvorsen, “Modelling of reaction kinetics in bubbling fluidized bed biomass gasification reactor,” Int. J. Energy Environ., vol. 5, no. 1, pp. 35–44, Jan. 2014. https://doi.org/10.2495/HT140161
A. Klimanek, W. Adamczyk, A. Katelbach-Woniak, G. Wecel & A. Szlek, “Towards a hybrid Eulerian-Lagrangian CFD modeling of coal gasification in a circulating fluidized bed reactor,” Fuel, vol. 152, pp. 131–137, Jul. 2015. https://doi.org/10.1016/j.fuel.2014.10.058
R. Jayathilake & S. Rudra, “Numerical and Experimental Investigation of Equivalence Ratio (ER) and Feedstock Particle Size on Birchwood Gasification,” Energies, vol. 10, no. 8, pp. 1–19, Aug. 2017. https://doi.org/10.3390/en10081232
J. Khan & T. Wang, “Development of a Devolatilization Model in Multi-Phase Simulation for a Hybrid Entrained-Flow and Fluidized Bed Mild Gasifier,” in Proc. 28th Annu. Intl. Pittsburgh Coal Conf, Pittsburgh, PA, Sep. 12-15, 2011, Paper 32-3.
N. Couto, V. Silva, E. Monteiro, P. Brito & A. Rouboa, “Using an Eulerian-granular 2-D multiphase CFD model to simulate oxygen air enriched gasification of agroindustrial residues,” Renew. Energy, vol. 77, no. 1, pp. 174–181, May. 2015. https://doi.org/10.1016/j.renene.2014.11.089
Q. Zhang, L. Dor, W. Yang & W. Blasiak, “Mathematical modeling of municipal solid waste plasma gasification in a fixed-bed melting reactor,” Energ. Fuel, vol. 25, no. 9, pp. 4129–4137, Nov. 2011. https://doi.org/10.1021/ef200383j
I. Sánchez, A. Gallardo & N. Edo, “Análisis comparativo de las tecnologías de valorización de residuos basadas en la gasificación,” in CONAMA 2014, Fundación Conama, Madrid, ES, November 24-27, 2014.
R. L. Bain & K. Broer, "Gasification", in Thermochemical Processing of Biomass: Conversion into Fuels, Chemicals and Power. New Jersey, USA: Wiley, 2011. https://doi.org/10.1002/9781119990840.ch3
P. Basu, Biomass Gasification and Pyrolysis Practical Design and Theory. Boston, USA: Academic Press, 2010.
J. Werther, “Potentials of Biomass Co-Combustion in Coal-Fired Boilers,” in Proc. 20th Intl. Conf. on Fluidized Bed Combustion. Berlin: Springer, 2009.
R. W. Breault, “Gasification processes old and new: A basic review of the major technologies,” Energies, vol. 3, no. 2, pp. 216–240, Feb. 2010. https://doi.org/10.3390/en3020216
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