An experimental study on gasification of Colombian coal in fluidised bed

Ocampo, Andrés Felipe García; Arenas, Erika; Chejne, Farid; Espinel, J; Londoño, Carlos; Aguirre, Juliana Valencia; Perez, Jose P.

doi:10.1016/s0016-2361(02)00253-3

Cited by 92 publications

(74 citation statements)

References 3 publications

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“…The Eulerian-granular model in ANSYS 12.0 was used to model the interactions between three phases: one gaseous phase and two granular particle phases within a fluidised bed taken from the literature (Ocampo et al, 2003). This model allows for the presence of the different phases in one control volume of the grid by introducing the volume fraction variable.…”

Section: Model Setupmentioning

confidence: 99%

“…The model was set up according to the experimental study of Colombian coal by Ocampo et al (2003). An initial bed of limestone and char was set to the height of 1.0m with a volume fraction of 0.48; an equal volume fraction was used for the two solid phases of 0.24 each.…”

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

“…The results for the gasification models were compared to the experimental results given in the literature (Ocampo et al, 2003). The mole fraction composition of the exit gases for the inert model 1 and model 2 are given in Fig.…”

Section: Comparison With Experimental Datamentioning

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 3 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: Model Setupmentioning

confidence: 99%

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

Section: Comparison With Experimental Datamentioning

confidence: 99%

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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“…The main types of fl uidized bed gasifi ers are bubbling and circulating, both have their advantages and disadvantages. It proves that circulating fl uidized bed (CFB) gasifi er better due to high resistance time and improved mass and heat transfer, which results in a high conversion 7,8 . ASPEN PLUS is a powerful numerical computation and simulation tool with built-in numerical functions for optimization of various parameters.…”

Section: Introductionmentioning

confidence: 99%

Simulation of circulating fluidized bed gasification for characteristic study of pakistani coal

Ramzan

Athar

Begum

et al. 2015

Polish Journal of Chemical Technology

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A process model for turbulent pressurized circulating fl uidized-bed coal gasifi er is created using ASPEN PLUS software. Both hydrodynamic and reaction kinetics parameter are taken into account, whose expressions for fl uidized bed are adopted from the literature. Various reactor models available in ASPEN PLUS with calculator as External Block are nested to solve hydrodynamics and kinetics. Multiple operational parameters for a pilot-plant circulating fl uidized-bed coal gasifi er are used to demonstrate the effects on coal gasifi cation characteristics. This paper presents detailed information regarding the simulation model, including robust analysis of the effect of stoichiometric ratio, steam to coal ratio, gasifi cation temperature and gasifi cation agent temperature. It is observed that, with the increase in the fl ow rate of air, the components hydrogen, carbon monoxide, carbon dioxide and methane reduce, which causes the Lower Heating Value (LHV) of synthesis gas (Syn. Gas) to decrease by about 29.3%, while increment in the steam fl ow rate shows a minute increase in heating value of only 0.8%. Stoichiometric ratio has a direct relationship to carbon conversion effi ciency and carbon dioxide production. Increasing the steam to coal ratio boosts the production of hydrogen and carbon monoxide, and causes a drop in both carbon dioxide concentration and the conversion effi ciency of carbon. High gasifying agent temperature is desired because of high concentration of CO and H 2 , increasing carbon conversion and LHV. A high gasifying agent temperature is the major factor that affects the coal gasifi cation to enhance H 2 and CO production rapidly along with other gasifi cation characteristics.

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Multifluid Modeling of the Desulfurization Process within a Bubbling Fluidized Bed Coal Gasifier

Armstrong

Luo

et al. 2013

AIChE Journal

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The desulfurization process to a two-dimensional (2-D) and three-dimensional (3-D) Eulerian–Eulerian computational fluid dynamic (CFD) model of a coal bubbling fluidized gasifier is introduced. The desulfurization process is important for the reduction of harmful SOx emissions; therefore, the development of a CFD model capable of predicting chemical reactions involving desulfurization is key to the optimization of reactor designs and operating conditions. To model the process, one gaseous phase and five particulate phases are included. Devolatilization, heterogeneous, and homogeneous chemical reactions as well as calcination and desulfurization reactions are incorporated. A calcination-only model and a calcination plus desulfurization model are simulated in 2-D and 3-D and the concentrations of SO2 leaving the reactors are compared. The simulated results are assessed against available published experimental data. The influence of the fluidized bed on the desulfurization is also considered

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An experimental study on gasification of Colombian coal in fluidised bed

Cited by 92 publications

References 3 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

Simulation of circulating fluidized bed gasification for characteristic study of pakistani coal

Multifluid Modeling of the Desulfurization Process within a Bubbling Fluidized Bed Coal Gasifier

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