CFD and experimental studies on a circulating fluidised bed reactor for biomass gasification
CFD and experimental studies on a circulating fluidised bed reactor for biomass gasification
Biomass gasification has been extensively studied in different thermochemical systems, as has the potential to produce fuel gas for chemicals, fuel and electricity applications. Circulating fluidised bed systems (CFB) are of particular interest due to the high reaction rates and thermal efficiency. The study of varying particle properties and gas velocities during the solids recirculation in a CFB system has been proved to greatly influence the overall biomass gasification process. A comparison between experimental and modelling gas-solid interactions can represent a comprehensive and analytical approach for further understanding and scaling up this reaction system. However, running several experiments is expensive and time-consuming. In this work, a reliable and accurate computational fluid dynamics (CFD) framework has been developed to evaluate the hydrodynamics performance of a CFB gasifier. The multiphase CFD model was validated using a pilot-scale CFB gasifier and silica sand. The CFD and experimental data showed good agreement for the solid recirculation tests, for example when comparing predicted and measured the spatial distribution of pressure up the gasifier's riser. It is the first time that the spatial distribution of solids around a CFB system has been numerically predicted, which can provide guidance to evaluate the hydrodynamics performance of CFB.
CFD, Circulating fluidised bed, Gas-solid interactions, Heat transfer, Hydrodynamics, Particle properties
284-295
Yu, Xi
7e4f553f-cc11-4c6e-ad6d-9fb5c3c07a60
Blanco, Paula H.
95da2984-781a-45ae-a410-7d6472cd275b
Makkawi, Yassir
217bdad4-a83f-44a9-ab54-b52633298456
Bridgwater, Anthony V.
0bb8f904-9940-4063-a29c-4b8c006786b1
2 July 2018
Yu, Xi
7e4f553f-cc11-4c6e-ad6d-9fb5c3c07a60
Blanco, Paula H.
95da2984-781a-45ae-a410-7d6472cd275b
Makkawi, Yassir
217bdad4-a83f-44a9-ab54-b52633298456
Bridgwater, Anthony V.
0bb8f904-9940-4063-a29c-4b8c006786b1
Yu, Xi, Blanco, Paula H., Makkawi, Yassir and Bridgwater, Anthony V.
(2018)
CFD and experimental studies on a circulating fluidised bed reactor for biomass gasification.
Chemical Engineering and Processing - Process Intensification, 130, .
(doi:10.1016/j.cep.2018.06.018).
Abstract
Biomass gasification has been extensively studied in different thermochemical systems, as has the potential to produce fuel gas for chemicals, fuel and electricity applications. Circulating fluidised bed systems (CFB) are of particular interest due to the high reaction rates and thermal efficiency. The study of varying particle properties and gas velocities during the solids recirculation in a CFB system has been proved to greatly influence the overall biomass gasification process. A comparison between experimental and modelling gas-solid interactions can represent a comprehensive and analytical approach for further understanding and scaling up this reaction system. However, running several experiments is expensive and time-consuming. In this work, a reliable and accurate computational fluid dynamics (CFD) framework has been developed to evaluate the hydrodynamics performance of a CFB gasifier. The multiphase CFD model was validated using a pilot-scale CFB gasifier and silica sand. The CFD and experimental data showed good agreement for the solid recirculation tests, for example when comparing predicted and measured the spatial distribution of pressure up the gasifier's riser. It is the first time that the spatial distribution of solids around a CFB system has been numerically predicted, which can provide guidance to evaluate the hydrodynamics performance of CFB.
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Published date: 2 July 2018
Additional Information:
Funding Information:
The authors thank to The Engineering and Physical Sciences Research Council (EPSRC) of the UK for the project research grant EP/M01343X/1, part of the SUPERGEN Bioenergy Challenge, UK.
Keywords:
CFD, Circulating fluidised bed, Gas-solid interactions, Heat transfer, Hydrodynamics, Particle properties
Identifiers
Local EPrints ID: 481898
URI: http://eprints.soton.ac.uk/id/eprint/481898
ISSN: 0255-2701
PURE UUID: 363f2094-b4d5-4b0f-b37d-fd23e2b737e0
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Date deposited: 12 Sep 2023 17:00
Last modified: 06 Jun 2024 02:19
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Contributors
Author:
Xi Yu
Author:
Paula H. Blanco
Author:
Yassir Makkawi
Author:
Anthony V. Bridgwater
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