Conference article

Simulation of air-biomass gasification in a bubbling fluidized bed using CPFD model

Ramesh Timsina
Department of Process Energy and Environmental Technology University of South-Eastern Norway

Britt Moldestad
Department of Process Energy and Environmental Technology University of South-Eastern Norway

Marianne S. Eikeland
Department of Process Energy and Environmental Technology University of South-Eastern Norway

Rajan K. Thapa
Department of Process Energy and Environmental Technology University of South-Eastern Norway

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Published in: Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden

Linköping Electronic Conference Proceedings 170:22, s. 145-150

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Published: 2020-01-24

ISBN: 978-91-7929-897-5

ISSN: 1650-3686 (print), 1650-3740 (online)


Biomass is a renewable energy source. Biomass gasification process produces producer gas, which can be further used for power generation or as raw materials for the production of secondary fuels. Experiment on the air gasification of biomass in a bubbling fluidized bed reactor was performed in a pilot-scale reactor located at the University of South-Eastern Norway (USN). A kinetics-based simulation model was developed based on MultiPhase Particle-In-Cell MP-PIC approach, using commercial software Barracuda®, and the results were compared with the experimental data. The average volume percentage of carbon monoxide, hydrogen, methane and nitrogen were found to be around 20%, 10%, 7% and 38% respectively in the experiment. The simulation results agree well for carbon monoxide, hydrogen and methane, but there is a difference in nitrogen volume percentage compared to the experimental results. The oxygen concentration during the experiment was around 1% suggesting a good performance of the gasifier. The char partial oxidation is less significant compared to the homogenous phase reactions. This shows that devolatilization reaction and the homogenous phase reactions dominate the char gasification reaction.


air-biomass gasification, bubbling fluidized bed, CPFD


J. C. Bandara, B. M. E. Moldestad and M. S. Eikeland. Analysing the effect of temperature for steam fluidized-bed gasification of biomass with MP-PIC simulation. International Journal of Energy and Environment, 9(6): 529-542, 2018.

R. B. Bates et al. Steam-air blown bubbling fluidized bed biomass gasification (BFBBG): Multi-scale models and experimental validation. AIChE Journal, 63(5): 1543-1565, 2017. doi:10.1002/aic.15666.

W. Doherty, A. Reynolds and D. Kennedy. Aspen plus simulation of biomass gasification in a steam blown dual fluidized bed. 2013.

C. Franco, F. Pinto, I. Gulyurtlu and I. Cabrita. The study of reactions influencing the biomass steam gasification process. Fuel, 82(7): 835-842, 2003. doi:10.1016/S0016-2361(02)00313-7.

X. Ku, T. Li and T. Løvås. CFD–DEM simulation of biomass gasification with steam in a fluidized bed reactor.  Chemical Engineering Science 122: 270-283, 2015. doi:10.1016/j.ces.2014.08.045.

X. Li et al. "Biomass gasification in a circulating fluidized bed. Biomass and Bioenergy, 26(2): 171-193, 2004. doi:10.1016/S0961-9534(03)00084-9.

H. Liu, R. J. Cattolica and R. Seiser. CFD studies on biomass gasification in a pilot-scale dual fluidized-bed system. International Journal of Hydrogen Energy, 41(28): 11974-11989, 2016. doi:10.1016/j.ijhydene.2016.04.205.

C. Loha, H. Chattopadhyay and P. K. Chatterjee. Three dimensional kinetic modeling of fluidized bed biomass gasification. Chemical Engineering Science, 109: 53-64, 2014. doi:10.1016/j.ces.2014.01.017.

G. Schuster, G. Löffler, K. Weigl and H. Hofbauer. Biomass steam gasification–an extensive parametric modeling study. Bioresource technology, 77(1): 71-79, 2001. doi:10.1016/S0960-8524(00)00115-2.

K.-A. Solli, R. K. Thapa and B. ME. Moldestad. Screening of kinetic rate equations for gasification simulation models. Proceedings of The 9th EUROSIM Congress on Modelling and Simulation, EUROSIM 2016.

R. Thapa, C. Pfeifer and B. M. Halvorsen. Modeling of reaction kinetics in bubbling fluidized bed biomass gasification reactor. Int. J. Energy Environment, 5: 35-44, 2014.

J. Xie, W. Zhong, B. Jin, Y. Shao and Y. Huang. Eulerian–Lagrangian method for three-dimensional simulation of fluidized bed coal gasification. Advanced Powder Technology, 24(1): 382-392, 2013. doi:10.1016/j.apt.2012.09.001.

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