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Статті в журналах з теми "Coal Combustion"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 25 липня 2025

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1

Mohd Samsuri, Muhamad Shazarizul Haziq, Hasril Hasini, Noor Akma Watie Mohd Noor, and Meor Mohd Faisal Meor Zulkifli. "Temperature Profile Assessment of Sub-Bituminous Coal by Using a Single Burner Combustion Test Facility." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 78, no. 1 (2020): 1–10. http://dx.doi.org/10.37934/arfmts.78.1.110.

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This paper presents a thermogravimetric analysis and combustion test for different coals used in a coal-fired power plant in Malaysia. The main objective is to investigate the suitability of adopting a newly-introduced sub-bituminuous coal in an existing boiler furnace commonly firing standard design coals. In order to ensure that the new coal will not give an adverse effect to the boiler, detail analytical and thermal performance of the new coal is investigated, together with design and other limiting coals. The combustion test was performed in a scaled down, 150kW, single swirl burner combus

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2

Ran, Jing Yu, Li Juan Liu, Chai Zuo Li, and Li Zhang. "Numerical Study on Optimum Designing of the Air Distribution Structure of a New Cyclone Combustor." Advanced Materials Research 347-353 (October 2011): 3005–14. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.3005.

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A new type of cyclone combustor is designed based on the traditional pulverized coal liquid slag combustor in this paper. According to the characteristics of swirl combustion and flow, numerical simulation of pulverized coal combustion in a new cyclone combustor has carried out using Realizable k-ε equation model with swirl modified to gas phase and stochastic trajectory model under Lagrange coordinate system to particle phase. Flows and combustion characteristics under different working conditions are mainly studied by changing the angles of primary and secondary air inlets, and then structur

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3

Aich, Subhajit, Dibyajyoti Behera, Barun Kumar Nandi, and Sumantra Bhattacharya. "Relationship between proximate analysis parameters and combustion behaviour of high ash Indian coal." International Journal of Coal Science & Technology 7, no. 4 (2020): 766–77. http://dx.doi.org/10.1007/s40789-020-00312-5.

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AbstractThis work presents the analysis of combustion characteristics of high ash Indian coal (28%–40%) collected from different mines of Singaurali coalfield, India. All the coal samples were characterized by proximate and gross calorific value analysis. Combustion performance of the coals were characterised using thermo-gravimetric analysis to identify the burning profile of individual coals. Various combustion kinetic parameters such as ignition temperature, peak temperature and burnout temperature, ignition index and burnout index, combustion performance index plus rate and intensity index

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4

Yang, Shuang Ping, Jie Dong, and Miao Wang. "Experiment on Combustion-Supporting Agent on PCI for Combustibility of Coal Powder." Materials Science Forum 658 (July 2010): 248–51. http://dx.doi.org/10.4028/www.scientific.net/msf.658.248.

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Анотація:

In order to improve the combustion effects of pulverized coal and replacement ratio of coals, the combustion- supporting mechanism, development and applications are analyzed and industry experiment are carried out based on the research of combustion- supporting agent without alkalis on coals combustion with TG- DTG- DSC ways. The results show that there is an optimum addition percent for coals combustion with combustion- supporting agent. The coal ratio and coke ratio are improved obviously with 1.7%combustion- supporting agent in LongGang.

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5

Murko, V. I., V. V. Bukhmirov, E. N. Bushuev, A. K. Dzhundubaev, M. S. Sultanaliev, and E. N. Temlyantseva. "Technological assessment of processes of water-coal fuel combustion of brown coal of Kara-Keche deposit of Kyrgyz Republic." Vestnik IGEU, no. 5 (October 31, 2022): 12–17. http://dx.doi.org/10.17588/2072-2672.2022.5.012-017.

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Brown coals are valuable natural resource. Brown coals of the Kara-Keche deposit are most of all ready for industrial development in the Kyrgyz Republic. To solve the problems of effective development of brown coal of this deposit, it is necessary to study the issues of direct combustion of water-coal fuel (WCF) without thermal stabilization of the flame with additional sources of heat release. Experimental studies of WCF combustion have been conducted at the experimental industrial technological stand of Siberian State Industrial University, Novokuznetsk city. Structural-rheological and therm

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6

Sechin, Alexander I., Yuri F. Patrakov, Irina L. Mezentseva, and Andrey A. Sechin. "Development of an experimental method for predicting the ignition stage of an airborne suspension based on visualization of combustion video files." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 336, no. 2 (2025): 241–50. https://doi.org/10.18799/24131830/2025/2/4968.

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Relevance. The problems arising in developing fuel composites and consisting in determining the optimal ratio of combustible components are solved in the study of their physicochemical and operational properties. Particular attention should be paid to ignition and combustion of the air suspension of fuel compositions. Aim. The implementation of these problems is seen in the development of an experimental technique for predicting some indicators of coals and coal waste based on the methodology of analyzing video files air suspension of ignition in the form of a graphical visualization of combus

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7

Kazagic, Anes, Izet Smajevic, and Neven Duic. "Selection of sustainable technologies for combustion of Bosnian coals." Thermal Science 14, no. 3 (2010): 715–27. http://dx.doi.org/10.2298/tsci1003715k.

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This paper deals with optimization of coal combustion conditions to support selection a sustainable combustion technology and an optimal furnace and boiler design. A methodology for optimization of coal combustion conditions is proposed and demonstrated on the example of Bosnian coals. The properties of Bosnian coals vary widely from one coal basin to the next, even between coal mines within the same basin. Very high percentage of ash (particularly in Bosnian brown coal) makes clear certain differences between Bosnian coal types and other world coal types, providing a strong argument for inves

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8

Dudzińska, Agnieszka. "The Effect of Pore Volume of Hard Coals on Their Susceptibility to Spontaneous Combustion." Journal of Chemistry 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/393819.

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In this paper the results of the experimental studies on a relationship between pore volume of hard coals and their tendency to spontaneous combustion are presented. Pore volumes were determined by the gas adsorption method and spontaneous combustion tendencies of coals were evaluated by determination of the spontaneous combustion indexesSzaandSza′on the basis of the current Polish standards. An increase in the spontaneous combustion susceptibility of coal occurs in the case of the rise both in micropore volumes and in macropore surfaces. Porosity of coal strongly affects the possibility of ox

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9

Tulepov, Marat I., Larissa R. Sassykova, Dauren A. Baiseitov, et al. "Synthesis and optimization of combustion of briquettes based on substandard brown coals of Kazakhstan deposits with multipolymer binders." Mediterranean Journal of Chemistry 10, no. 3 (2020): 302–9. http://dx.doi.org/10.13171/mjc02003271253ls.

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Анотація:

The work aimed to study the process of burning coal briquettes with polymers. As the object of the research, the coals of Kazakhstan deposits were applied. The methodology of the study included theoretical and computational studies on the applied significance of coal processing, analysis by physicochemical research methods, pressing, drying and briquetting of coal with binders. It is shown that the briquettes combustion takes place stepwise and is characterized by a stationary regime. This is due to the mutual influence of the stages of pyrolysis of polyolefins and combustion of coke residue o

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10

Qiu, Shuxing, Ramana G. Reddy, Xianyou Huang, Chen Yin, and Shengfu Zhang. "Relationships between Combustion Behavior in Air and the Chemical Structure of Bituminous Coal during Combustion Processes." Energies 15, no. 14 (2022): 5154. http://dx.doi.org/10.3390/en15145154.

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The structural parameters of five bituminous coals were analyzed by using X-ray diffraction and attenuated total reflection–Fourier transform infrared spectroscopy. The combustion behavior of coal was investigated by using a thermogravimetric analyzer under air conditions. Furthermore, the relationships between combustion parameters and the coal structure were established. The results show that bituminous coals contain crystalline and amorphous carbon. The aromaticity, interlayer spacing, average stacking height, aliphatic chain length, and the hydrocarbon-generating potential varied with the

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11

Mohd Noor, Noor Akma Watie, Hasril Hasini, Muhamad Shazarizul Haziq Mohd Samsuri, and Meor Mohd Faisal Meor Zulkifli. "CFD Analysis on the Effects of Different Coal on Combustion Characteristics in Coal-fired Boiler." CFD Letters 12, no. 10 (2020): 128–38. http://dx.doi.org/10.37934/cfdl.12.10.128138.

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Coal quality is essential for the optimum functioning of coal-fired power plants. One of the issues associated with coal quality deterioration is poor combustion behaviour which could result in ash deposition and environmental issues. This paper presents a CFD investigation of flow and combustion process in a full-scale furnace. Three different sub-bituminous coals with different properties were tested namely Coal A, B and C. The aim is to predict the combustion performance of these coals by observing its flow, temperature and species concentration inside the furnace. The exact boiler furnace

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12

Bee´r, J. M., and R. V. Garland. "A Coal-Fueled Combustion Turbine Cogeneration System With Topping Combustion." Journal of Engineering for Gas Turbines and Power 119, no. 1 (1997): 84–92. http://dx.doi.org/10.1115/1.2815567.

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Cogeneration systems fired with coal or other solid fuels and containing conventional extracting-condensing or back pressure steam turbines can be found throughout the world. A potentially more economical plant of higher output per unit thermal energy is presented that employs a pressurized fluidized bed (PFB) and coal carbonizer. The carbonizer produces a char that is fed to the PFB and a low heating value fuel gas that is utilized in a topping combustion system. The topping combustor provides the means for achieving state-of-the-art turbine inlet temperatures and is the main contributor to e

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13

Fan, Jiuyuan, Gang Wang, and Jiuling Zhang. "Study on Spontaneous Combustion Tendency of Coals with Different Metamorphic Grade at Low Moisture Content Based on TPO-DSC." Energies 12, no. 20 (2019): 3890. http://dx.doi.org/10.3390/en12203890.

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In the environments of various open coal storage sites, mining-affected coalbeds, and goafs, etc., some coal bodies are often affected by external environmental factors. They are highly prone to spontaneous combustion in low moisture content (≤8%). In order to examine the effect of low moisture content on the spontaneous combustion tendency of coals with different metamorphic grade, we conducted a temperature programmed oxidation (TPO) experiment and differential scanning calorimetry (DSC) experiment to study the spontaneous combustion characteristics of coals with different metamorphic grade

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14

Cui, Wei, Qingjun Meng, Wenbo Li, and Qiyan Feng. "Enrichment and Chemical Speciation of Vanadium and Cobalt in Stone Coal Combustion Products in Ankang, Shanxi Province, China." International Journal of Environmental Research and Public Health 19, no. 15 (2022): 9161. http://dx.doi.org/10.3390/ijerph19159161.

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Stone coal enriches more elements compared to other coals, especially Vanadium (V). The content of Co is relatively low, while its environmental risk is relatively high. This study collected the stone-coal samples to investigate the enrichment characteristics and the chemical speciation in the combustion products of V and Co in stone coal at an open-pit coal mine in Ankang City, Shanxi Province, China. A simulation combustion experiment and sequential chemical extraction were conducted. Mineral composition was analyzed for raw-stone coal and its combustion products. The results showed that mos

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15

Som, S. K., S. S. Mondal, and S. K. Dash. "Energy and Exergy Balance in the Process of Pulverized Coal Combustion in a Tubular Combustor." Journal of Heat Transfer 127, no. 12 (2005): 1322–33. http://dx.doi.org/10.1115/1.2101860.

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A theoretical model of exergy balance, based on availability transfer and flow availability, in the process of pulverized coal combustion in a tubular air-coal combustor has been developed to evaluate the total thermodynamic irreversibility and second law efficiency of the process at various operating conditions. The velocity, temperature, and concentration fields required for the evaluation of flow availability have been computed numerically from a two-phase separated flow model on a Eulerian-Lagrangian frame in the process of combustion of pulverized coal particles in air. The total thermody

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16

Mohammad Nurizat Rahman. "Optimisation of Solid Fuel In-furnace Blending for an Opposed-firing Utility Boiler: A Numerical Analysis." CFD Letters 14, no. 9 (2022): 89–107. http://dx.doi.org/10.37934/cfdl.14.9.89107.

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Continuous research on the clean and effective use of coal is still necessary as coal will continue to play a key role in global energy supply for the foreseeable future. Hence, in the current study, the optimisation of in-furnace coal blending for one of Malaysia's opposed-firing utility boilers was numerically executed on the basis of hydrodynamics and combustion characteristics. The predicted FEGT from the numerical model was validated against the actual FEGT from the coal-fired power plant, revealing a difference of less than 10 %. Four (4) coal blended cases were tested, which included bo

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17

Teng, Ying Yue, Yu Zhe Liu, Quan Sheng Liu, and Chang Qing Li. "Macerals of Shengli Lignite in Inner Mongolia of China and Their Combustion Reactivity." Journal of Chemistry 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/2513275.

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The macerals, including fusinitic coal containing 72.20% inertinite and xyloid coal containing 91.43% huminite, were separated from Shengli lignite using an optical microscope, and their combustion reactivity was examined by thermogravimetric analysis. Several combustion parameters, including ignition and burnout indices, were analyzed, and the combustion kinetics of the samples were calculated by regression. Fusinitic coal presented a porous structure, while xyloid coal presented a compact structure. The specific surface area of fusinitic coal was 2.5 times larger than that of xyloid coal, an

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18

Pełka, Piotr, Grzegorz Golański, and Paweł Wieczorek. "Evolution of the Structure and Mechanical Strength of a Coal Particle During Combustion in the Atmosphere of Air and the Mixture of Oxygen and Carbon Dioxide / Ewolucja Struktury Oraz Wytrzymałości Mechanicznej Ziarna Węgla Podczas Spalania W Atmosferze Powietrza Oraz Mieszaninie Tlenu I Dwutlenku Węgla." Archives of Mining Sciences 58, no. 3 (2013): 673–90. http://dx.doi.org/10.2478/amsc-2013-0047.

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Abstract The research was conducted on the basis of four different types of hard coal and one type of brown coal. There are typical coals commonly used as fuel in Polish CFB boilers. The combustion process was conducted at a temperature of 850°C and the atmosphere of ambient air as well as in the mixture of oxygen and carbon dioxide in different proportions. The research was carried out using specially prepared cubical coal particles with measurements of 15×15mm and also 10×10 mm. The change of the mechanical properties was analyzed based on three parameters, i.e. compression strength, Vickers

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19

Ejesieme, Vitus O., Nicole Vorster, Juan Riaza, Gary Dugmore, and Ben Zeelie. "Reclamation of ultra-fine coal with scenedesmus microalgae and comprehensive combustion property of the Coalgae® composite." Journal of Energy in Southern Africa 31, no. 1 (2020): 14–27. http://dx.doi.org/10.17159/2413-3051/2020/v31i1a6430.

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Combustion of South African discard ultra-fine coal (i.e. coal dust), charcoal, microalgae biomass, and composites of the three under air were studied. The study involves to find out the effect of Scenedesmus microalgae biomass on the comprehensive combustion characteristics of the ultra-fines. Coal dust is considered as waste material, but it could be modified and combusted for energy. The composites were designed with Design Expert, and unlike blending with the dry microalgae biomass, fresh slurry was blended with the ultra-fine coal and charcoal. Non-isothermal combustion was carried out at

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20

Umar, Datin, Suganal Suganal, Ika Monika, Gandhi Hudaya, and Dahlia Diniyati. "The influence of steam drying process on combustion behavior of Indonesian low-rank coals." Indonesian Mining Journal 23, no. 2 (2020): 105–15. http://dx.doi.org/10.30556/imj.vol23.no2.2020.1105.

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Steam drying process of the Low Rank Coals (LRCs) has been conducted to produce coal which is comparable with the High Rank Coal (HRC). Characterization of the raw and dried coals was carried out through proximate, ultimate, calorific value, Fourier Transform Infrared (FTIR) spectroscopy and Thermo Gravimetry-Differential Thermal Analysis (TG-DTA) to study the combustion behavior of the coals. This study used Indonesian low rank coals coming from Tabang (TKK coal) and Samurangau (SP coal), East Kalimantan. The results indicate that the calorific value of the dried coals increases significantly

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21

Chai, Yi-fan, Jian-liang Zhang, Qiu-jun Shao, Xiao-jun Ning, and Kai-di Wang. "Experiment Research on Pulverized Coal Combustion in the Tuyere of Oxygen Blast Furnace." High Temperature Materials and Processes 38, no. 2019 (2019): 42–49. http://dx.doi.org/10.1515/htmp-2017-0141.

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AbstractThe actual combustion rate of pulverized coal in the blast furnace tuyere is hard to be measured. In this research, the combustion rate of pulverized coal injected into oxygen blast furnace was obtained by a new equipment. This equipment can simulate the actual blast furnace well, and the relationship between pulverized coal injection (PCI) ratio and AO/C was established by mathematical deduction. The experimental results show that the best combustibility of the four pulverized coals is C, and when the coal injection ratio is 350 kg/tHM, the combustion rate can be reached 79%, while th

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22

Cowell, L. H., R. T. LeCren, and C. E. Tenbrook. "Two-Stage Slagging Combustor Design for a Coal-Fueled Industrial Gas Turbine." Journal of Engineering for Gas Turbines and Power 114, no. 2 (1992): 359–66. http://dx.doi.org/10.1115/1.2906599.

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A full-size combustor for a coal-fueled industrial gas turbine engine has been designed and fabricated. The design is based on extensive work completed through one-tenth scale combustion tests. Testing of the combustion hardware will be completed with a high pressure air supply in a combustion test facility before the components are integrated with the gas turbine engine. The combustor is a two-staged, rich-lean design. Fuel and air are introduced in the primary combustion zone where the combustion process is initiated. The primary zone operates in a slagging mode inertially removing coal ash

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23

Fatia Umar, Datin, Zulfahmi, Nendaryono Madiutomo, et al. "Low-rank coal upgrading to optimize its utilization as fuel." IOP Conference Series: Earth and Environmental Science 1378, no. 1 (2024): 012031. http://dx.doi.org/10.1088/1755-1315/1378/1/012031.

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Abstract Indonesia’s coal resources and reserves are mostly categorized as low-rank coal, lignite and sub-bituminous coals. Most of them have a high content of moisture, a low calorific value, and a high tendency to low-temperature oxidation and self-combustion, making them difficult to transport over long distances. To increase the utilization of the low-rank coals, a drying treatment was carried out by heating the coal at a temperature and pressure of 160°C and 3.5 Bar respectively for about 15 minutes. Two low-rank coal samples, from South Sumatra (A coal) and South Kalimantan (B coal) were

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24

Hainley, D. C., M. Z. Haji-Sulaiman, S. Yavuzkurt, and A. W. Scaroni. "Operating Experience With a Fluidized Bed Test Combustor." Journal of Energy Resources Technology 109, no. 2 (1987): 58–65. http://dx.doi.org/10.1115/1.3231325.

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This paper presents operating experience with a fluidized bed combustor burning various coals. The primary focus is on the effect of relevant coal properties on combustor performance. Tests were carried out using anthracite, HVB and HVC bituminous and sub-bituminous A coals, and petroleum coke. Comparisons of the performance of the combustion on the various fuels are made. A two-stage fluidized bed combustor operating in a single-stage mode without recycle was employed. Experimental measurements included temperature, fuel feed rate, fluidization velocity and bed height. For some of the coals,

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25

Wang, Minghao, Zhenzhou Pang, Guohua Wei, et al. "Research on Oxy-Fuel Combustion Characteristics of Two Typical Chinese Coals." Processes 11, no. 7 (2023): 1933. http://dx.doi.org/10.3390/pr11071933.

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Oxy–fuel (O2/CO2) combustion technology shows great potential for carbon reduction. However, difference in the combustion atmosphere would affect coal combustion characteristics and pollutant emissions. In order to explore oxy–fuel combustion characteristics, two typical Chinese coals, sub–bituminous and lean coal, were utilized. Based on thermogravimetry and pilot–scale test, the ignition and burnout characteristics under oxy–fuel and air combustion atmosphere were investigated. Besides, the NOx emission characteristics were also investigated on the pilot–scale test. Through experimental resu

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26

Zhuikov, A. V., A. I. Matyushenko, V. A. Kulagin, and D. A. Loginov. "Research of combustion of solid fuel mixture based on coals of different degrees of metamorphism in the regions of Yenisei Siberia." Power engineering: research, equipment, technology 24, no. 5 (2022): 136–46. http://dx.doi.org/10.30724/1998-9903-2022-24-5-136-146.

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THE PURPOSE. Consider the combustion process of two coals of different degrees of metamorphism and their mixtures using thermogravimetric analysis based on the change in mass and the rate of change in mass during the heating of fuels. Determine the main characteristics of fuels and the combustion process (temperature of ignition and burnout of the coke residue). Determine the tendency to slagging of coal mixtures. METHODS. When solving the tasks, the thermogravimetric method (TGA). RESULTS. The article provides a brief overview of the combustion of non-design fuels at thermal power plants. The

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27

Rowan, Steven L., Ismail B. Celik, Albio D. Gutierrez, and Jose Escobar Vargas. "A Reduced Order Model for the Design of Oxy-Coal Combustion Systems." Journal of Combustion 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/943568.

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Анотація:

Oxy-coal combustion is one of the more promising technologies currently under development for addressing the issues associated with greenhouse gas emissions from coal-fired power plants. Oxy-coal combustion involves combusting the coal fuel in mixtures of pure oxygen and recycled flue gas (RFG) consisting of mainly carbon dioxide (CO2). As a consequence, many researchers and power plant designers have turned to CFD simulations for the study and design of new oxy-coal combustion power plants, as well as refitting existing air-coal combustion facilities to oxy-coal combustion operations. While C

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28

Demirbaş, Ayhan. "Biomass Co-Firing for Coal-Fired Boilers." Energy Exploration & Exploitation 21, no. 3 (2003): 269–78. http://dx.doi.org/10.1260/014459803769520070.

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In this study ground biomass and pulverized coal were used for co-firing test. The tests of co-firing of coal and biomass were carried out in a bench-scale bubbling fluidized bed combustor. Biomass is an attractive and sustainable renewable fuel to supplement coal combustion in utility boilers. Coal co-firing was successful with up to a 20% biomass mix boilers. Coal and biomass fuels are quite different in composition. Ash composition for the biomass is fundamentally different from ash composition for the coal. Chlorine in the biomass may affect operation by corrosion. Ash deposits reduce heat

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29

Sorokin, Anatoly, and Oleg Ageev. "The technology of gold-containing concentrates recovery from the coal combustion products of the Yerkovetskoye brown coal deposit (the Amur Region, Russia)." E3S Web of Conferences 56 (2018): 03003. http://dx.doi.org/10.1051/e3sconf/20185603003.

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Анотація:

The results of experimental research of the native gold distribution in the coal combustion products (CCP) obtained out of the brown coals of the Yerkovetskoye deposit combustion material in the experimental technological complex “Amur” (ETС “Amur”) are described in the article. The technology of the formation of slag, fly ash and products of wet cleaning of flue gases in the process of various combustion modes of coal combustion is examined. The possibility of the obtaining of enriched gold-containing concentrate by gravity and magnetic methods from the brown coal combustion products and extr

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30

Zhuikov, A. V., D. A. Loginov, G. R. Mongush, S. V. Chicherin, and N. A. Zemlyansky. "Thermogravimetric analysis of the combustion of Tuva coals before and after their carbonization." iPolytech Journal 26, no. 2 (2022): 270–83. http://dx.doi.org/10.21285/1814-3520-2022-2-270-283.

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The process of combusting Tuva coals before and after their carbonization was studied using the methods of thermogravimetric analysis and electron microscopy. Coal samples were subjected to thermomechanical and elemental analysis, which revealed a higher content of volatile substances in Kaa-Khem coal (47.5 %) compared to Chadan coal (10 %). Following carbonization, a decrease in volatile substances to 11.5 % and 9.3 %, respectively, was observed. The conducted thermogravimetric analysis showed the ignition temperature of the coke residue of the Kaa-Khem and Chadan coal samples to increase by

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31

Israilov, M., T. Akbarov, and Y. Nurboboyev. "SELF-HEATING AND SPONTANEOUS COMBUSTION ANGREN BROWN COAL." Technical science and innovation 2020, no. 3 (2020): 90–95. http://dx.doi.org/10.51346/tstu-01.20.3-77-0085.

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The article presents the issues of prevention and prevention of processes related to ensuring safe and comfortable working conditions in the development of coal deposits, namely the study of spontaneous combustion of coal Angren deposit. Chemical activity of coals at low temperatures contributing to spontaneous combustion is emphasized, as well as the influence of hot climate in the region on the increase in chemical activity of coals. In this connection, climatic conditions of the region have been studied, i.e., increased temperature (from +250 to +500C) gives a sharp increase in the chemical

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32

Collins, Leo W., and David L. Wertz. "Mass Absorption Corrected X-ray Diffraction Analysis of Entrained-Flow Reactor Coal Combustion Products." Advances in X-ray Analysis 34 (1990): 429–35. http://dx.doi.org/10.1154/s0376030800014749.

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AbstractThe analysis of coal and the understanding of the combustion process is complex, due to the heterogeneous nature of the material and the myriad of high-temperature reactions inherent in this fossil fuel. The research presented below utilizes recently-developed x-ray diffraction methods to analyze the coal combustion products generated from a laboratory-scale entrained-flow reactor. The reactor was designed, constructed, and tested, as planned for the initial phase of a long-term project to evaluate the coals located in Mississippi. In this initial phase a well-characterized coal was us

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33

Shvydkii, V. S., S. P. Kudelin, I. A. Gurin, and V. Yu Noskov. "Development of information modeling system of coal-dust fuel injection into tuyeres of blast furnace." Izvestiya. Ferrous Metallurgy 62, no. 12 (2020): 979–86. http://dx.doi.org/10.17073/0368-0797-2019-12-979-986.

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The article considers a mathematical model of combustion zone of blast furnace working with the use of injection of coal-dust fuel. In this model, two subsystems were identified: 1) subsystem of heating the particles of coal dust and volatiles release in the combustion zone; 2) subsystem of heat exchange and combustion processes in the tuyere. A two-dimensional velocity field of gas in the combustion zone was investigated. The combustion processes are considered as a set of simultaneously developing phenomena of coke burning in a layer, single pieces of coke and particles of coal dust. The mod

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34

Hou, Shuhn-Shyurng, Chiao-Yu Chiang, and Ta-Hui Lin. "Oxy-Fuel Combustion Characteristics of Pulverized Coal under O2/Recirculated Flue Gas Atmospheres." Applied Sciences 10, no. 4 (2020): 1362. http://dx.doi.org/10.3390/app10041362.

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Oxy-fuel combustion is an effective technology for carbon capture and storage (CCS). Oxy-combustion for coal-fired power stations is a promising technology by which to diminish CO2 emissions. Unfortunately, little attention has been paid to the oxy-combustion characteristics affected by the combustion atmosphere. This paper is aimed at investigating the oxy-fuel combustion characteristics of Australian coal in a 0.3 MWth furnace. In particular, the influences of various oxygen flow rates and recirculated flue gas (RFG) on heating performance and pollutant emissions are examined in O2/RFG envir

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35

Ihor, Beztsennyi, Bondzyk Dmytro, Dunayevska Nataliya, and Nekhamin Mark. "RESEARCH OF CO-COMBUSTION OF SOLID BIOFUEL WITH LEAN AND BITUMINOUS COAL." Technology audit and production reserves 6, no. 1 (50) (2019): 4–10. https://doi.org/10.15587/2312-8372.2019.187165.

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<em>The object of research is the processes of thermal conversion of steam coal and biomass, with the aim of creating highly efficient environmentally friendly technologies for its joint combustion into fuel boiler units.</em> <em>One of the important problems that impede the introduction of co-combustion of biomass with coal is the insufficient knowledge of the interaction of two very different solid fuels. The characteristics of grinding, particle aerodynamics, kinetics of all stages of combustion during the joint combustion of two solid fuels remain unexplored. Co-combustion of biomass with

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36

Smajevic, Izet, Nihad Hodzic, and Anes Kazagic. "Lab-scale investigation of Middle-Bosnia coals to achieve high-efficient and clean combustion technology." Thermal Science 18, no. 3 (2014): 875–88. http://dx.doi.org/10.2298/tsci1403875s.

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This paper describes full lab-scale investigation of Middle-Bosnia coals launched to support selection an appropriate combustion technology and to support optimization of the boiler design. Tested mix of Middle-Bosnia brown coals is projected coal for new co-generation power plant Kakanj Unit 8 (300-450 MWe), EP B&H electricity utility. The basic coal blend consisting of the coals Kakanj: Breza: Zenica at approximate mass ratio of 70:20:10 is low grade brown coal with very high percentage of ash - over 40%. Testing that coal in circulated fluidized bed combustion technique, performed at Ru

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37

Sechin, Alexander I., Yuri F. Patrakov, Irina L. Mezentseva, and Andrey A. Sechin. "Combustion of composite fuel from coal and sawdust." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 336, no. 3 (2025): 222–31. https://doi.org/10.18799/24131830/2025/3/4990.

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Relevance. In the last decade, the problem of the necessity of utilizing large volumes of both non-design coal and coal waste, as well as waste of the wood processing industry at existing thermal power plants has become increasingly urgent. The solution of this problem expanded the research area of dispersed combustible materials combustion issues, making the study of joint combustion of low-metamorphosed power coals, coal waste and wood processing waste, as requirements for rational utilization of industrial waste. Aim. To study the composite fuel combustion from coal and sawdust based on the

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38

Shin, Jeong-Seon, Dowon Shun, Churl-Hee Cho, and Dal-Hee Bae. "A Study on the Co-Combustion Characteristics of Coal and Bio-SRF in CFBC." Energies 16, no. 4 (2023): 1981. http://dx.doi.org/10.3390/en16041981.

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Bio-SRF based on livestock waste has low heating value and high moisture content. The concentration of toxic gases such as SOx, NOx, and HCl in the flue gas is changed according to the composition of fuel, and it has been reported. Therefore, the study of fuel combustion characteristics is necessary. In this study, we investigated combustion characteristics on the blended firing of coal and Bio-SRF (bio-solid refused fuel) made from livestock waste fuel in CFBC (circulating fluidized bed combustor). The raw materials for manufacturing Bio-SRF include agricultural waste, herbaceous plants, wast

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39

Murko, V. I., V. I. Karpenok, M. P. Baranova, V. V. Bukhmirov, and E. N. Temlyantseva. "Features of combustion of composite coal-water fuel." Vestnik IGEU, no. 3 (June 30, 2024): 5–12. http://dx.doi.org/10.17588/2072-2672.2024.3.005-012.

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Russia has large coal reserves, on the average up to 173 billion tons. Although, the share of coal generation in Russia is relatively small (about 20–22 %), it reaches 65 % in the Siberian Federal District. Russia cannot deny coal, but it is necessary to update and improve energy efficiency of Thermal Power Plants (TPP) and boiler houses that burn coal. Currently, technologies have been developed to produce and use composite coal-water fuel (CWF) with various additives, primarily of organic origin to improve its target characteristics. A study of the characteristics of such coal-water suspensi

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40

Fang, Jiuwen, Mingxin Li, Baosheng Gao, et al. "Numerical simulation of pulverized coal combustion in a 660MW tangentially fired boiler with fuel variation." Journal of Physics: Conference Series 2599, no. 1 (2023): 012022. http://dx.doi.org/10.1088/1742-6596/2599/1/012022.

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Abstract To study the effects of various coal properties on the combustion characteristics during actual operation, and on the high temperature corrosion of the water wall. The paper presents a numerical simulation of a 660MW boiler using ANSYS FLUENT software. Three cases were investigated with various fuel properties: (1) the designed coal NO.1, (2) the non-designed coal NO.2 with high ash, high sulphur content and low volatile matter, (3) the blended fuel of coal NO.3with similar coal quality to the coal NO.1 and NO.4 with high sulphur content. Simulation results indicate that blended coal

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41

So, Min Seop, Duncan Kibet, Tae Kyeong Woo, Seong-Joon Kim, and Jong-Ho Shin. "Prediction of SOx-NOx Emission in Coal-Fired Power Plant Using Deep Neural Network." Machines 11, no. 12 (2023): 1042. http://dx.doi.org/10.3390/machines11121042.

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Coal has been used as the most commonly energy source for power plants since it is relatively cheap and readily available. Thanks to these benefits, many countries operate coal-fired power plants. However, the combustion of coal in the coal-fired power plant emits pollutants such as sulfur oxides (SOx) and nitrogen oxides (NOx) which are suspected to cause damage to the environment and also be harmful to humans. For this reason, most countries have been strengthening regulations on coal-consuming industries. Therefore, the coal-fired power plant should also follow these regulations. This study

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42

Wen, Chaojun, Junlin Lu, Xiaoqing Lin, et al. "Thermal Behavior Prediction of Sludge Co-Combustion with Coal: Curve Extraction and Artificial Neural Networks." Processes 11, no. 8 (2023): 2275. http://dx.doi.org/10.3390/pr11082275.

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Previous studies on the co-combustion of sludge and coal have not effectively utilized the characteristics of the combustion process to predict thermal behavior. Therefore, focusing on these combustion process characteristics is essential to understanding and predicting thermal behavior during the co-combustion of sludge and coal. In this paper, we use thermogravimetric analysis to study the co-combustion of coal and sludge at different temperatures (300–460 °C, 460–530 °C, and 530–600 °C). Our findings reveal that the ignition improves, but the combustion worsens with more sludge. Then, we fu

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43

Nakata, T., M. Sato, T. Ninomiya, and T. Hasegawa. "A Study on Low NOx Combustion in LBG-Fueled 1500°C-Class Gas Turbine." Journal of Engineering for Gas Turbines and Power 118, no. 3 (1996): 534–40. http://dx.doi.org/10.1115/1.2816680.

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Developing integrated coal gasification combined-cycle systems ensures cost-effective and environmentally sound options for supplying future power generation needs. The reduction of NOx emissions and increasing the inlet temperature of gas turbines are the most significant issues in gas turbine development in Integrated Coal Gasification Combined Cycle (IGCC) power generation systems. The coal gasified fuel, which is produced in a coal gasifier of an air-blown entrained-flow type has a calorific value as low as 1/10 of natural gas. Furthermore, the fuel gas contains ammonia when a gas cleaning

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44

Ghetti, Paolo, Ubaldo De Robertis, Salvatore D'Antone, Marco Villani, and Emo Chiellini. "Coal combustion." Fuel 64, no. 7 (1985): 950–55. http://dx.doi.org/10.1016/0016-2361(85)90150-4.

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45

Wu, Yuguo, Yulong Zhang, Jie Wang, Xiaoyu Zhang, Junfeng Wang, and Chunshan Zhou. "Study on the Effect of Extraneous Moisture on the Spontaneous Combustion of Coal and Its Mechanism of Action." Energies 13, no. 8 (2020): 1969. http://dx.doi.org/10.3390/en13081969.

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It is imperative to have an in-depth understanding of the effect of extraneous moisture on the spontaneous combustion of coal not only for the control and prevention of coal spontaneous combustion in the coal mining industry, but also for the optimization design and application of the technological process. In this study, the type of moisture in a coal body has been redefined for the first time from the perspective of disaster prevention and control, i.e., original occurrence of moisture in the coal matrix and the extraneous moisture from the technological process. A suit of coal bodies with d

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46

HARADA, Eiichi, and Kenichi FUJII. "Coal partial combustor for low-NOx coal combustion system." Journal of the Fuel Society of Japan 69, no. 2 (1990): 112–17. http://dx.doi.org/10.3775/jie.69.112.

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47

Wang, Yong Zheng, Xiu Juan Li, Su Le Tian, and Chun Mei Lu. "Experimental Study on the Pollutants Release Characteristics During Combustion of Lean Coal with Different Coal Rank." Advanced Materials Research 518-523 (May 2012): 2143–46. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.2143.

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In this paper, the characteristics of SO2 and NO release during combustion of lean coal with different coal rank were experimentally studied in the one-dimensional furnace for pulverized coal combustion. The results showed: The coal property and proportion of the component coals have great influence on the characteristics of SO2 and NO release. The releasing concentration of SO2 and NO distributing along the furnace height is generally between that of component coals, and the releasing characteristics of SO2 and NO would be more near to that of the larger proportion coal. The measuring value o

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48

Cai, Ping, Li Jun Zhao, Kun Wang, and Song Tao Kong. "Experiment Study on Mixed Combustion of Biomass and Coal." Advanced Materials Research 978 (June 2014): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amr.978.3.

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Mixed combustion of biomass and coal is a new combustion way of comprehensive utilization biomass and coal energy resources. Biomass is more volatile, lower combustion temperature, combustion is mainly concentrated in front, low calorific value and the use of value is limited. Coal is less volatile, high combustion temperature, combustion exothermic are mainly concentrated in coke combustion, and exothermic is high. Studying on the combustion process and the combustion characteristics of mixed combustion of biomass and coal is development technologies based of mixed combustion of biomass and c

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49

Wu, Jian Qun, Dun Xi Yu, Lan Lan He, et al. "Partitioning of Harmful Elements in PM₁₀ from Air-and Oxy-Coal Combustion: Iron and Sulfur." Advanced Materials Research 726-731 (August 2013): 963–66. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.963.

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Adverse health effects of Fe and S in airborne particulate matter (PM) have been reported. However, little work has been done to characterize Fe and S in PM10 from coal combustion. In this study, a sub-bituminous coal (coal A) and a bituminous coal (coal B) were subjected to combustion in a drop tube furnace under air-and oxy-firing conditions. Size distribution and elemental composition of PM10 (PM with aerodynamic diameter 10 μm) were obtained by low pressure impactor and X-ray fluorescence techniques, respectively. The partitioning characteristics of Fe and S in PM10 were investigated. Data

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50

Taborda Acevedo, Esteban Alberto, William Jose Jurado Valencia, and Farid B. Cortés. "Glycerol effect on the inhibition of spontaneous combustion of subbituminous coal." Boletín de Ciencias de la Tierra, no. 40 (July 1, 2016): 64–74. http://dx.doi.org/10.15446/rbct.n40.55999.

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Factors favoring the phenomenon of spontaneous combustion in coal mainly depend on the intrinsic properties such as coal particle size, moisture content, among others; the medium in which it is located and how it is stored. Consistent with this, the objective of this work is to evaluate the effect of glycerol on the inhibition of self-combustion as water re-adsorption reducer through the addition of glycerol in different amounts (4, 8, 18 and 28% wt). The coal sample was extracted from the Córdoba department, Colombia. Incipient impregnation method was used to perform the addition of glycerol

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