Numerical simulation of the bubbling fluidized bed coal gasification by the kinetic theory of granular flow (KTGF)

Yu, Liang; Lü, Jing; Zhang, Xiangping; Zhang, Suojiang

doi:10.1016/j.fuel.2006.09.008

Cited by 135 publications

(80 citation statements)

References 36 publications

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“…The gaseous phase consists of a mixture of 8 species, namely H 2 O, O 2 , CO 2 , CO, H 2 , CH 4 , Tar and N 2 . As carried out by previous researcher (Petersen and Werther, 2005;Yu et al, 2007), the tar is regarded as C 6 H 6 since the composition of tar is usually regarded as condensed nuclei aromatics. The limestone consists of two pseudo-species -CaCO 3 and CaO.…”

Section: Gasification Reactionsmentioning

confidence: 99%

“…Boundary conditions for the gas phase were set to no-slip and for the particulate phase a tangential slip condition was imposed which was developed by Johnson and Jackson (1987). The cell size in the horizontal direction was 0.01m whilst the vertical direction was set to 0.02m creating a domain of (22x100) cells as used previously (Enwald et al, 1999;Yu et al, 2007). The region near the coal inlet was further reduced to a minimum of 0.4mm horizontally and 0.8mm vertically to correctly capture the pyrolysis characteristics near the fuel inlet.…”

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

“…He considered the drying and devolatilisation processes to occur non-instantaneously whereas Chejne and Hernandez (2002) considered these processes as instantaneous since drying and devolatilisation takes place very quickly in fluidised beds. Yu et al (2007) carried out a two-dimensional Eulerian-Eulerian model of the gasification of Colombian coal based on the experimental work of Ocampo et al (2003).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Armstrong

Luo

2011

Chemical Engineering Journal

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Section: Gasification Reactionsmentioning

confidence: 99%

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

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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“…The laminar finite-rate model computes the chemical source terms using Arrhenius expressions, and ignores the effects of turbulent fluctuations [10]. The net source of chemical species "I" due to reaction is computed as the sum of the Arrhenius reaction sources over the N R reactions that the species participate in and is given as: Figure 1.…”

Section: The Governing Equationsmentioning

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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“…Numerous CFD models using the EE, EL, and hybrid EL approaches were previously developed to simulate fluidized-bed gasifiers, but most of them were only focused on one keycomponent of the fluidized bed system such as a gasifier [20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional full-loop simulation of a dual fluidized-bed biomass gasifier

et al. 2015

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h i g h l i g h t sCFD simulation of biomass gasification in a dual fluidized-bed. The CFD model predicts the gas composition and the reactor temperature distribution. The CFD model has been validated by experimental data. The effects of the particle size distribution and drag models have been investigated. a r t i c l e i n f o t r a c tA three-dimensional CFD model was developed to simulate the full-loop of a dual fluidized-bed biomass gasification system consisting of a gasifier, a combustor, a cyclone separator, and a loop-seal. This fullloop simulation includes the chemical kinetic modeling of biomass drying and pyrolysis, heterogeneous char reactions, and homogeneous gas-phase reactions. In the model, the gas phase is described using Large Eddy Simulation (LES) and the particle phase is described with the Multiphase Particle-In-Cell (MP-PIC) method. The simulation was performed using the GPU-accelerated computing and the simulation results were compared with the gas composition and temperature measurements from a pilot-scale biomass gasification power plant (1 MW th , 6 tons biomass/day). The independence of the accuracy of the model on mesh resolution and computational particle number was determined. The impacts of the particle size distributions (PSD) and drag models on the reactive flows were also investigated.

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Numerical simulation of the bubbling fluidized bed coal gasification by the kinetic theory of granular flow (KTGF)

Cited by 135 publications

References 36 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

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

Three-dimensional full-loop simulation of a dual fluidized-bed biomass gasifier

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