An Eulerian modeling approach of wood gasification in a bubbling fluidized bed reactor using char as bed material

Gerber, Stefan; Behrendt, Frank; Oevermann, Michael

doi:10.1016/j.fuel.2010.03.034

Cited by 186 publications

(103 citation statements)

References 44 publications

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“…Furthermore, this also agrees with the findings of Gerber et al (2010) who carried out a parametric study on the effects of the inclusion of heat transfer coefficients with a char bed of a biomass BFBG. They found that an ideal adiabatic model, as presently used, provided a higher temperature distribution hence increasing the reaction kinetics for CO 2 consumption.…”

Section: Comparison With Experimental Datasupporting

confidence: 90%

“…different wall temperatures and the introduction of heat transfer coefficients on the wall as carried out previously for biomass (Gerber et al, 2010). The variation in temperature within the bed would greatly affect the composition of the species as the reaction kinetics for the heterogeneous, homogeneous and pyrolysis reactions exhibit a strong dependence on the temperature.…”

Section: Temperature Distributionsmentioning

confidence: 99%

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Effects of limestone calcination on the gasification processes in a BFB coal gasifier

Armstrong

Luo

2011

Chemical Engineering Journal

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Section: Comparison With Experimental Datasupporting

confidence: 90%

Section: Temperature Distributionsmentioning

confidence: 99%

Effects of limestone calcination on the gasification processes in a BFB coal gasifier

Armstrong

Luo

2011

Chemical Engineering Journal

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“…A different and a simpler method, reported by Gerber et al [39], assumed that the biomass entering the reactor contains no water and then added the moisture truly existing in the biomass to the inlet in the form of gaseous water. In this study, the biomass drying is implemented in the model based on evaporative mass transfer process where the biomass water content is assumed to be converted to moisture and added to the gases phase according to the following mass transfer equation [37]:…”

Section: Dryingmentioning

confidence: 99%

A CFD study of biomass pyrolysis in a downer reactor equipped with a novel gas–solid separator-II thermochemical performance and products

Hassan

Ocone

et al. 2015

Fuel Processing Technology

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Highlight A CFD model is used to simulate biomass fast pyrolysis in a downer reactor. An Eulerian-Eulerian approach with a single global pyrolysis reaction is used. A novel gas-solid separator was used to control the gas residence time. Predicted pyrolysis yield is in good agreement with reported literature data. AbstractA Eulerian-Eulerian CFD model was used to investigate the fast pyrolysis of biomass in a downer reactor equipped with a novel gas-solid separation mechanism. The highly endothermic pyrolysis reaction was assumed to be entirely driven by an inert solid heat carrier (sand). A one-step global pyrolysis reaction, along with the equations describing the biomass drying and heat transfer, was implemented in the hydrodynamic model presented in part I of this study (Fuel Processing Technology, V126,(366)(367)(368)(369)(370)(371)(372)(373)(374)(375)(376)(377)(378)(379)(380)(381)(382). The predictions of the gas-solid separation efficiency, temperature distribution, residence time and the pyrolysis product yield are presented and discussed. For the operating conditions considered, the devolatilisation efficiency was found to be above 60% and the yield composition in mass fraction was 56.85% bio-oil, 37.87% bio-char and 5.28% non-condensable gas (NCG). This has been found to agree reasonably well with recent relevant published experimental data. The novel gas-solid separation mechanism allowed achieving greater than 99.9% separation efficiency and < 2 s pyrolysis gas residence time. The model has been found to be robust and fast in terms of computational time, thus has the great potential to aid in future design and optimisation of the biomass fast pyrolysis process.

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“…Eulerian multi-fluid model is adopted [12] [13] [14] where gas and solid phases are all treated as continua, interpenetrating and interacting with each other everywhere in the computational domain. The finite rate model is considered.…”

Section: Discussionmentioning

confidence: 99%

CFD Analysis on Fluidized Bed Gasification of Rice Husk and Rice Straw

Singh¹,

Srivastava²

2017

OALib

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In the work being presented, computational fluid dynamics (CFD) analysis on fluidized bed gasification of rice husk has been carried out. The multiphase Eulerian model was undertaken in the analysis. Due to the lack of computational space, two dimensional models of fluidized bed were created. The objective of the investigation was to study the effect of variation on velocity with varying particle sizes. The quality of synthesis gas was also taken into account. The inlet's superficial velocity was varied from 0.2 m/s to 1.2 m/s and diameter of rice husk varied from 0.0438 mm to 4.38 mm. Based on obtained results, this may be concluded that minimum fluidization velocity decreases with increase in diameter of rice husk. The carbon conversion was found to be maximum for 0.7 m/s velocity and carbon conversion increased for other velocities up to 96.9%. The analysis was carried out using ANSYS FLUENT 14.0 non-commercial code. Subject AreasMechanical Engineering

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An Eulerian modeling approach of wood gasification in a bubbling fluidized bed reactor using char as bed material

Cited by 186 publications

References 44 publications

Effects of limestone calcination on the gasification processes in a BFB coal gasifier

Effects of limestone calcination on the gasification processes in a BFB coal gasifier

A CFD study of biomass pyrolysis in a downer reactor equipped with a novel gas–solid separator-II thermochemical performance and products

CFD Analysis on Fluidized Bed Gasification of Rice Husk and Rice Straw

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