Study on the Effect of Coal Grain Size on the Morphology of Soot Generated During Combustion
This study performed an experimental exploration to analyze the influence of different grain sizes of coal on the nanostructure and morphological parameters of soot generated during combustion. Initially, primary and mature soot samples were gained from the combustion flames of two different grain s...
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2024-11-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/17/22/5734 |
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| author | Jiani Liu Mengting Si Yindi Zhang Bing Liu Changqian Shi |
| author_facet | Jiani Liu Mengting Si Yindi Zhang Bing Liu Changqian Shi |
| author_sort | Jiani Liu |
| collection | DOAJ |
| description | This study performed an experimental exploration to analyze the influence of different grain sizes of coal on the nanostructure and morphological parameters of soot generated during combustion. Initially, primary and mature soot samples were gained from the combustion flames of two different grain sizes of coal (less than 150 μm, named sample #1, and 6–8 mm, named sample #2) by using thermophoresis sampling technology. Subsequently, the transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were employed to investigate and analyze the soot samples, with the aim of obtaining their morphological parameters and nanostructure characteristics. The TEM images indicate that the nascent soot produced during the flame formed by small-sized coal is relatively uniform, with individual particles 8–14 nm in size. The grain size of the nascent soot produced by large-sized coal is much larger, within a wide range of 50–350 nm. Additionally, the nanostructures of the nascent soot particles produced by samples #1 and #2 mainly consist of upright parallel crystal stripes. The crystal stripes of the soot particles formed by sample #1 have obvious microcrystalline structures, whereas only a small amount of microcrystalline structure is found at the edge of sample #2. Compared with sample #2, the soot formed during the combustion of sample #1 exhibits a denser crystalline structure. The SEM results indicate that the mature soot agglomerates formed in sample #2 are larger and more in quantity compared to sample #1. Furthermore, the mature soot agglomerates formed in sample #2 have a stronger coagulation performance and a more compact structure than that formed in sample #1. |
| format | Article |
| id | doaj-art-ff88145742ed4b20979aed3e0ffefbf3 |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2024-11-01 |
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| series | Energies |
| spelling | doaj-art-ff88145742ed4b20979aed3e0ffefbf32024-11-26T18:02:33ZengMDPI AGEnergies1996-10732024-11-011722573410.3390/en17225734Study on the Effect of Coal Grain Size on the Morphology of Soot Generated During CombustionJiani Liu0Mengting Si1Yindi Zhang2Bing Liu3Changqian Shi4National Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, School of Petroleum Engineering, Yangtze University, Wuhan 430000, ChinaNational Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, School of Petroleum Engineering, Yangtze University, Wuhan 430000, ChinaNational Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, School of Petroleum Engineering, Yangtze University, Wuhan 430000, ChinaNational Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, School of Petroleum Engineering, Yangtze University, Wuhan 430000, ChinaNational Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, School of Petroleum Engineering, Yangtze University, Wuhan 430000, ChinaThis study performed an experimental exploration to analyze the influence of different grain sizes of coal on the nanostructure and morphological parameters of soot generated during combustion. Initially, primary and mature soot samples were gained from the combustion flames of two different grain sizes of coal (less than 150 μm, named sample #1, and 6–8 mm, named sample #2) by using thermophoresis sampling technology. Subsequently, the transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were employed to investigate and analyze the soot samples, with the aim of obtaining their morphological parameters and nanostructure characteristics. The TEM images indicate that the nascent soot produced during the flame formed by small-sized coal is relatively uniform, with individual particles 8–14 nm in size. The grain size of the nascent soot produced by large-sized coal is much larger, within a wide range of 50–350 nm. Additionally, the nanostructures of the nascent soot particles produced by samples #1 and #2 mainly consist of upright parallel crystal stripes. The crystal stripes of the soot particles formed by sample #1 have obvious microcrystalline structures, whereas only a small amount of microcrystalline structure is found at the edge of sample #2. Compared with sample #2, the soot formed during the combustion of sample #1 exhibits a denser crystalline structure. The SEM results indicate that the mature soot agglomerates formed in sample #2 are larger and more in quantity compared to sample #1. Furthermore, the mature soot agglomerates formed in sample #2 have a stronger coagulation performance and a more compact structure than that formed in sample #1.https://www.mdpi.com/1996-1073/17/22/5734coal combustionnanostructuresoot morphologymicrocrystalline structurethermophoretic samplingSEM/TEM analysis |
| spellingShingle | Jiani Liu Mengting Si Yindi Zhang Bing Liu Changqian Shi Study on the Effect of Coal Grain Size on the Morphology of Soot Generated During Combustion Energies coal combustion nanostructure soot morphology microcrystalline structure thermophoretic sampling SEM/TEM analysis |
| title | Study on the Effect of Coal Grain Size on the Morphology of Soot Generated During Combustion |
| title_full | Study on the Effect of Coal Grain Size on the Morphology of Soot Generated During Combustion |
| title_fullStr | Study on the Effect of Coal Grain Size on the Morphology of Soot Generated During Combustion |
| title_full_unstemmed | Study on the Effect of Coal Grain Size on the Morphology of Soot Generated During Combustion |
| title_short | Study on the Effect of Coal Grain Size on the Morphology of Soot Generated During Combustion |
| title_sort | study on the effect of coal grain size on the morphology of soot generated during combustion |
| topic | coal combustion nanostructure soot morphology microcrystalline structure thermophoretic sampling SEM/TEM analysis |
| url | https://www.mdpi.com/1996-1073/17/22/5734 |
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