Modelling of oxy-pulverized coal combustion to access the influence of steam addition on combustion characteristics

Yadav, Sujeet; Mondal, Subha

doi:10.1016/j.fuel.2020.117611

Cited by 9 publications

(4 citation statements)

References 39 publications

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“…At a point located 5 cm away from the wall the temperature disparity for experimental and numerical analysis is lower and equals about 50 • C. A temperature distribution obtained during numerical modeling is getting closer to the experimental results as exhausts are moved away from the fixed bed in the vertical direction. Occurred temperature overestimation results from numerical modeling as an effect of the application of the Eddy Dissipation Model (EDM) of combustion [40,41]. EDM assumes that the realized combustion process is complete, which affects the temperature overestimation.…”

Section: Resultsmentioning

confidence: 99%

Numerical and Experimental Analysis of Heat Transfer for Solid Fuels Combustion in Fixed Bed Conditions

Judt

2020

Energies

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The paper concerns the analysis of the heat transfer process that occurred during solid fuel burning in fixed bed conditions. The subject of the analysis is a cylindrical combustion chamber with an output of 12 kW heating power equipped with a retort burner for hard coal and biomass combustion. During the research, a numerical and experimental study is performed. The analysis is prepared for various heat load of the combustion chamber, which allowed for the reconstruction of real working conditions for heating devices working with solid fuels combustion. The temperature distribution obtained by the experimental way is compared with results of the numerical modeling. Local distribution of principal heat transfer magnitudes like a heat flux density and a heat transfer coefficient that occurred on the sidewall of the combustion chamber is analyzed. The analysis showed, that the participation of convection and radiation in the overall heat transfer process has resulted from the heat load of the heating device. Research results may be used for improving an analytical approach of design process taking place for domestic and industrial combustion chambers.

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Section: Resultsmentioning

confidence: 99%

Numerical and Experimental Analysis of Heat Transfer for Solid Fuels Combustion in Fixed Bed Conditions

Judt

2020

Energies

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“…Water vapor (H 2 O) is a main component of O 2 /CO 2 combustion flue gas, and the influence of H 2 O on Hg 0 removal cannot be ignored. 21 to analyze the mercury removal mechanism when H 2 O and other gases coexist. So far, little attention has been paid to the role of H 2 O in mercury behavior.…”

Section: Introductionmentioning

confidence: 99%

“…Water vapor (H 2 O) is a main component of O 2 /CO 2 combustion flue gas, and the influence of H 2 O on Hg 0 removal cannot be ignored . Considering the complex components of flue gas in O 2 /CO 2 combustion, it is important to analyze the mercury removal mechanism when H 2 O and other gases coexist.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Kinetic Analysis of H₂O on Hg⁰ Removal by Sorbent Traps in Oxy-combustion Atmosphere

Wang

Shen

et al. 2021

Ind. Eng. Chem. Res.

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Oxy-combustion technology is under development for CO2 capture. H2O could influence the Hg0 removal by sorbent traps in an oxy-combustion atmosphere. A study of the effects of H2O on Hg0 removal by biomass char under oxy-combustion conditions is presented in this paper. The kinetic model analysis was conducted to study the adsorption process of Hg0, which included a pseudo-first-order kinetic model, a pseudo-second-order kinetic model, and intraparticle diffusion kinetic model. Experimental results showed that a low-level of H2O had a promoting effect on the adsorption of Hg0, and high-level of H2O had an inhibiting effect. A high concentration of H2O would form a water film on the surface of sorbent traps to hinder the removal of external mass transfer on Hg0. Although the adsorption rate of Hg0 depended both on external mass transfer and intraparticle diffusion, external mass transfer was a more important controlling factor. It was found that physical adsorption was one of the main forms of Hg0 removal on the surface of sorbent traps, owing to the large specific surface area and good pore structure of the modified corn straw char. The removal of Hg0 was mainly attributed to capture by physical adsorption and the formation of HgO by chemisorption.

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“… 18 When water vapour and carbon dioxide are both present in the furnace atmosphere, water molecules will primarily occupy active sites in char. 19 In this respect Yadav and Mondal 20 found that the char gasification reaction was enhanced in water vapor enrichment cases, affecting the flame temperature distribution and the incident radiation profile of the combustion furnace. Niu et al also investigated intrinsic kinetics to predict ash effects on coal char burnout in air and O 2 /CO 2 atmospheres showing that ash vaporization was lower in O 2 /CO 2 atmospheres than in air.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the transformation behaviours of Fe-bearing minerals of coal in O₂/CO₂ combustion atmosphere containing H₂O

Huang

Xin

et al. 2021

RSC Adv.

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Modelling of oxy-pulverized coal combustion to access the influence of steam addition on combustion characteristics

Cited by 9 publications

References 39 publications

Numerical and Experimental Analysis of Heat Transfer for Solid Fuels Combustion in Fixed Bed Conditions

Numerical and Experimental Analysis of Heat Transfer for Solid Fuels Combustion in Fixed Bed Conditions

Experimental and Kinetic Analysis of H₂O on Hg⁰ Removal by Sorbent Traps in Oxy-combustion Atmosphere

Investigation on the transformation behaviours of Fe-bearing minerals of coal in O₂/CO₂ combustion atmosphere containing H₂O

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Modelling of oxy-pulverized coal combustion to access the influence of steam addition on combustion characteristics

Cited by 9 publications

References 39 publications

Numerical and Experimental Analysis of Heat Transfer for Solid Fuels Combustion in Fixed Bed Conditions

Numerical and Experimental Analysis of Heat Transfer for Solid Fuels Combustion in Fixed Bed Conditions

Experimental and Kinetic Analysis of H2O on Hg0 Removal by Sorbent Traps in Oxy-combustion Atmosphere

Investigation on the transformation behaviours of Fe-bearing minerals of coal in O2/CO2 combustion atmosphere containing H2O

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Resources

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Experimental and Kinetic Analysis of H₂O on Hg⁰ Removal by Sorbent Traps in Oxy-combustion Atmosphere

Investigation on the transformation behaviours of Fe-bearing minerals of coal in O₂/CO₂ combustion atmosphere containing H₂O