Experimental Study of Coal MILD Combustion at a Pilot-Scale Furnace

Mao, Zhihui; Zhang, Liqi; Zhu, Xinyang; Chen, Zheng

doi:10.1007/978-981-10-2023-0_23

Cited by 5 publications

(6 citation statements)

References 17 publications

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“…Energy Yield (%) = HHV of torrefied biomass HHV of raw biomass × % Mass Yield (6) Energy Efficiency = Energy yield Mass yield = HHV of torrefied biomass HHV of raw biomass (7) where HHV is the high heating value of the sample 2.3.6. Proximate Analysis…”

Section: Production Yield Analysismentioning

confidence: 99%

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Enhanced Torrefied Oil-Palm Biomass as an Alternative Bio-Circular Solid Fuel: Innovative Modeling of Optimal Conditions and Ecoefficiency Analysis

Khamwichit,

Kasawapat,

Seekao

et al. 2024

Energies

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Energy production from coal combustion is responsible for nearly 40% of global CO2 emissions including SOx and NOx. This study aims to produce solid biomass fuels from oil-palm residues by torrefaction, having a high heating value (HHV) equivalent to fossil coals. The experiments were designed using Design Expert version 13 software to optimize the conditions affecting the fuel characteristics of the torrefied products. The statistical analysis suggested that the optimal conditions to achieve a high HHV and fixed carbon content while retaining the mass yield of biomass mainly depended on the temperature and torrefying time, while the size played a less important role in affecting the properties. The optimal conditions were observed to be at 283 °C (120 min) for EFBs, 301 °C (111 min) for PF, and 285 °C (120 min) for PKSs. The maximum HHV of 5229, 5969, and 5265 kcal/kg were achieved for the torrefied EFBs, PF, and PKSs, respectively. The energy efficiency of torrefied biomass was increased to 1.25–1.35. Ecoefficiency analysis suggested that torrefaction should be carried out at high temperatures with a short torrefying time. This low-cost bio-circular torrefied biomass showed promising fuel characteristics that could be potentially used as an alternative to coals.

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Section: Production Yield Analysismentioning

confidence: 99%

“…According to a study, emissions from coal combustion may decrease human lifespans by an average of 11 years [7]. These poisons include mercury, lead, cadmium, sulfur, and nitrate compounds which can impair brain function and pass through the nasal mucosa and into the lungs.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Torrefied Oil-Palm Biomass as an Alternative Bio-Circular Solid Fuel: Innovative Modeling of Optimal Conditions and Ecoefficiency Analysis

Khamwichit,

Kasawapat,

Seekao

et al. 2024

Energies

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“…It is considered as validated, industrialized, clean, efficient, and one of the most prospective coal technology. The United States Department of Energy surveys and forecasts the development of IGCC power generation technology, and related research result is shown in Table III [3]. …”

Section: A Igcc Power Generation Technologymentioning

confidence: 99%

Research on IGCC Power Generation Technology Using High Sulfur Pet Coke

Liu¹,

Li²,

Xu³

2016

Proceedings of the 2016 International Conference on Energy, Power and Electrical Engineering

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Abstract-High sulfur pet coke power generation through Integration Gasification Combined Cycle technology is discussed in this paper. Compared with coal, high sulfur pet coke has characteristics like high carbon content, high sulfur content, high heat value, low ash content and low volatile matter. IGCC power generation technology has characteristics as high power generation efficiency and low pollution emission. IGCC power generation technology is considered to be a good way to use high sulfur pet coke.

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“…The coal combustion experiments conducted in a 0.58 MW test furnace showed that the NO x emission from highly preheated air combustion was 215−220 ppm, much lower than the NO x emission of 800− 1000 ppm for conventional combustion. 11 The experiments conducted by Stadler et al 12,13 and Mao et al 14,15 showed that the NO emission of MILD combustion realized by increasing jet velocity to induce strong internal FGR was half that of swirl-flame combustion. The experimental and computational fluid dynamics (CFD) numerical results of Saha et al 16−19 suggested that smaller particle sizes and higher jet velocities lead to lower NO x emission.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive and Quantitative Separation of Different NO Routes during Moderate and Intense Low-Oxygen Dilution Oxy-fuel Combustion of Pulverized Coal Particles

Li,

Zhou,

Yang

et al. 2024

Energy Fuels

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Moderate and intense low-oxygen dilution oxy-coal combustion (MILD-OCC) technology is prospective as a result of its high thermal efficiency, low NO x emission, and applications for carbon capture and sequestration. MILD-OCC experiments were carried out on the flat flame burner combustion facility where the diffusion flamelet can provide the stable hot coflow of the fixed temperatures and oxygen volume fractions. The flue gas species concentrations at different axial heights above the burner tip were measured by the flue gas analyzer. First, pulverized coal particle combustion experiments under CO2, N2 and Ar dilution with different coflow temperatures and oxygen volume fractions were carried out to quantitatively separate thermal and fuel NO. The NO formation kinetics were obtained through nth-order Arrhenius nonlinear fitting to calculate the relative contributions of thermal and fuel NO. Second, the comparison between the experiments of coal and char combustion was made to quantitatively separate the formation and reduction of volatile NO and char NO. Finally, different concentrations of initial NO were added to the oxidizer to simulate recycled NO, and the experiments on the influence of different concentrations of recycled NO were conducted to quantitatively separate the recycled NO reburning. Therefore, the NO formation and reduction mechanisms during the whole process of MILD-OCC were quantitatively separated, and their relative contributions were identified. With the increase of the coflow temperature from 1473 to 1873 K under the condition of 10% O2, the relative contribution rate of volatile NO reduction to fuel NO decreases from 25 to 17%, with the relative contribution rate of char NO reduction to fuel NO increasing from 2 to 9% and the relative contribution rate of recycled NO reburning to fuel NO increasing from 7 to 19%. The results can provide a comprehensive and quantitative perspective on the NO x routes and the control method of low NO x emissions for MILD-OCC.

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Experimental Study of Coal MILD Combustion at a Pilot-Scale Furnace

Cited by 5 publications

References 17 publications

Enhanced Torrefied Oil-Palm Biomass as an Alternative Bio-Circular Solid Fuel: Innovative Modeling of Optimal Conditions and Ecoefficiency Analysis

Enhanced Torrefied Oil-Palm Biomass as an Alternative Bio-Circular Solid Fuel: Innovative Modeling of Optimal Conditions and Ecoefficiency Analysis

Research on IGCC Power Generation Technology Using High Sulfur Pet Coke

Comprehensive and Quantitative Separation of Different NO Routes during Moderate and Intense Low-Oxygen Dilution Oxy-fuel Combustion of Pulverized Coal Particles

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