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Numerical modelling of a fast pyrolysis process in a bubbling fluidized bed reactor

Citation

Jalalifar, S and Ghiji, M and Abbassi, R and Garaniya, V and Hawboldt, K, Numerical modelling of a fast pyrolysis process in a bubbling fluidized bed reactor, Proceedings of the 2017 International Conference on Sustainable Energy Engineering (IOP Conference Series: Earth and Environmental Science), 12-14 June 2017, Perth, Australia, pp. 139-145. ISSN 1755-1315 (2017) [Refereed Conference Paper]


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Copyright Statement

Copyright 2017 The Authors. Published under Creative Commons Attribution 3.0 Unported (CC BY 3.0) licence in, Proceedings of the 2017 International Conference on Sustainable Energy Engineering (IOP Conference Series: Earth and Environmental Science) by IOP Publishing Ltd. https://creativecommons.org/licenses/by/3.0/ Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

DOI: doi:10.1088/1755-1315/73/1/012032

Abstract

In this study, the Eulerian-Granular approach is applied to simulate a fast pyrolysis bubbling fluidized bed reactor. Fast pyrolysis converts biomass to bio-products through thermochemical conversion in absence of oxygen. The aim of this study is to employ a numerical framework for simulation of the fast pyrolysis process and extend this to more complex reactor geometries. The framework first needs to be validated and this was accomplished by modelling a lab-scale pyrolysis fluidized bed reactor in 2-D and comparing with published data. A multi-phase CFD model has been employed to obtain clearer insights into the physical phenomena associated with flow dynamics and heat transfer, and by extension the impact on reaction rates. Biomass thermally decomposes to solid, condensable and non-condensable and therefore a multi-fluid model is used. A simplified reaction model is sued where the many components are grouped into a solid reacting phase, condensable/non-condensable phase, and non-reacting solid phase (the heat carrier). The biomass decomposition is simplified to four reaction mechanisms based on the thermal decomposition of cellulose. A time-splitting method is used for coupling of multi-fluid model and reaction rates. A good agreement is witnessed in the products yield between the CFD simulation and the experiment.

Item Details

Item Type:Refereed Conference Paper
Keywords:fast pyrolysis, bubbling fluidized bed, CFD
Research Division:Engineering
Research Group:Environmental Engineering
Research Field:Environmental Engineering Modelling
Objective Division:Mineral Resources (excl. Energy Resources)
Objective Group:Environmentally Sustainable Mineral Resource Activities
Objective Field:Environmentally Sustainable Mineral Resource Activities not elsewhere classified
Author:Jalalifar, S (Mr Salman Jalalifar)
Author:Ghiji, M (Mr Mohammadmahdi Ghiji)
Author:Abbassi, R (Dr Rouzbeh Abbassi)
Author:Garaniya, V (Dr Vikram Garaniya)
ID Code:117501
Year Published:2017
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2017-06-16
Last Modified:2018-04-19
Downloads:33 View Download Statistics

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