Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions

Jovanović, Rastko; Rašuo, Boško; Stefanović, P; Cvetinović, Dejan; Świątkowski, B.

doi:10.1016/j.ijheatmasstransfer.2012.11.070

Cited by 18 publications

(9 citation statements)

References 19 publications

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“…To overcome the flame stability issue in the oxy‐fuel combustion, they redesigned the burner and increased secondary stream swirl which strengthens the IRZ. Jovanović et al proposed a novel LES model able to handle all possible ignition/combustion mechanism of pulverized coal particles in oxy‐fuel combustion and solved ignited jet flame of pulverized coal using proposed model. They addressed limitations of the standard k‐ε model by comparing the performance of the proposed model with the standard model.…”

Section: Aspects Of Coal Combustionmentioning

confidence: 57%

A complete review based on various aspects of pulverized coal combustion

Yadav

Mondal

2019

Int J Energy Res

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Summary Coal is the most abundant energy source, and around 40% of the world's electricity is produced by coal combustion. The emission generated through it put a constraint on power production by coal combustion. There is a need to reduce the emissions generated through it to utilize the enormous energy of coal for power production. Detailed understanding of various aspects of coal combustion is required to reduce the emissions from coal‐fired furnaces. The aim of present paper is to review various aspects of pulverized coal combustion such as oxy‐fuel combustion, co‐combustion of coal and biomass, emissions from pulverized coal furnaces, ash formation and deposition, and carbon capture and sequestration (CCS) technologies to outline the progress made in these aspects. Both experimental and numerical aspects are included in this review. This review also discusses the thermodynamic aspects of the combustion process. Furthermore, the effect of various submodels such as devolatilization models, char combustion models, radiation models, and turbulent models on the process of pulverized coal combustion has been investigated in this paper.

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Section: Aspects Of Coal Combustionmentioning

confidence: 57%

A complete review based on various aspects of pulverized coal combustion

Yadav

Mondal

2019

Int J Energy Res

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“…For stoichiometric and lean conditions of glycine, the reactions were carried out under oxidizer conditions. Glycine has a small carbonic chain, and the presence of N and OH in the structure provides an intense and fast high-temperature combustion during ignition, which releases a high volume of gases [42]. Smaller crystallites and more porous structures were achieved for these compositions since the entry of oxygen is not a problem.…”

Section: Resultsmentioning

confidence: 99%

“…These properties are mainly adjusted by controlling the chemical composition of the fuel and the ratio of fuel to the oxidizer ratio [41]. The stoichiometry of the SCS reactions is determined based on calculations for fueloxidizer mixtures in the chemistry of propellants [39][40][41], which consider the amount of oxidizing and reducing elements in the reaction [42].…”

Section: Introductionmentioning

confidence: 99%

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Influence of the fuel composition and the fuel/oxidizer ratio on the combustion solution synthesis of MgFe2O4 catalyst nanoparticles

Sun¹,

Kaufmann²,

Alves³

et al. 2018

FME Transactions

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Solution combustion synthesis (SCS) has been widely applied to produce oxide catalysts due to the possibility of producing highly pure and homogeneous nanostructured powders at low cost. The smaller the particles are and the higher the surface area is, the more efficient the powder catalyst will be. For iron-based catalysts such as ferrites, the degree of spinel inversion is another factor that affects the catalyst activity. In SCS, the particle size, surface area, and degree of spinel inversion are fundamentally related to process variables such as the fuel composition and the fuel/oxidizer ratio. Therefore, we studied the application of glycine and polyethylene glycol-200 molecular weight (PEG 200) as fuels and the influence of the fuel/oxidizer ratio in the SCS of MgFe 2 O 4 catalyst nanoparticles. The products' morphology and composition were systematically characterized by X-ray diffraction, microscopy analyses, and specific surface area. The results indicate the production of high-purity nanoparticles with increased surface area, which was obtained with low concentrations of glycine and a wide range of particle sizes that depend on the fuel composition and concentration.

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“…Because of this reason, the Discrete Ordinates (DO) method was selected for radiation modelling. Weighted sum of gray gases model [4,6] was selected to calculate the fluid absorption coefficient. In addition, scattering function of 0.9, has been used [3].…”

Section: Radiation Modellingmentioning

confidence: 99%

Numerical Analysis of Pulverised Coal Fired Boiler with Different Burner Geometries

2015

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Pulverized coal combustion is extensively used in utility boilers, industrial boilers, furnaces, kilns, and other energy conversion appliances. The effective utilization of pulverized coal is the main problem in study of combustion processes, particularly in burning low-grade coal. It is well known that the emission of nitrogen oxides (NOx) during coal combustion is a main environmental problem. In this study, three different pulverised coal burner geometries for a pulverised coal fired boiler have been studied by numerical analysis. GLI-Tunçbilek coal was used as fuel. Threedimensional numerical analysis was carried out using Ansys Fluent code. Realizable K-ε turbulence method, single rate devolatilization method, multiple char combustion method and second-order upwind discretization method were used during calculations. Coal particle diameter and coal mass flow rate were assumed to be 70 µm and 378 kg/h respectively.

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Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions

Cited by 18 publications

References 19 publications

A complete review based on various aspects of pulverized coal combustion

A complete review based on various aspects of pulverized coal combustion

Influence of the fuel composition and the fuel/oxidizer ratio on the combustion solution synthesis of MgFe2O4 catalyst nanoparticles

Numerical Analysis of Pulverised Coal Fired Boiler with Different Burner Geometries

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