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Impact of the Temperature, Pressure, and Particle Size on Tar Composition from Pyrolysis of Three Ranks of Chinese Coals
Alternative TitleEnergy Fuels
Gong, Xiaomin1,2; Wang, Ze1; Deng, Shuang3; Li, Songgeng1; Song, Wenli1; Lin, Weigang1
2014-08-01
Source PublicationENERGY & FUELS
ISSN0887-0624
Volume28Issue:8Pages:4942-4948
AbstractTar compositions from pyrolysis of three ranks of Chinese coals of Hailaer lignite, Fugu sub-bituminous coal, and Liulin bituminous coal under different temperatures and pressures were analyzed via a pyrolyer combined with gas chromatography/mass spectrometry (Py-GC/MS). A nuclear magnetic resonance (NMR) analysis was performed to characterize the coals. It was found that the relative content of polycyclic aromatic hydrocarbons (PAHs) is not as sensitive to temperature as monocyclic aromatic hydrocarbons (MAHs), which increased with increasing the pyrolysis temperature. A decreasing trend of the content of acids/esters was observed for all three ranks of coals. However, the three coals exhibited quite different trends with the temperature in terms of the relative content of aliphatic hydrocarbons. MAHs and PAHs were predominant components in the tar from Liulin bituminous coal. The tars from Hailaer lignite and Fugu sub-bituminous coal were rich in phenolics, which can be detected at a low temperature of 400 degrees C. In contrast, the phenolics were much less in the tar from Liulin bituminous coal and can merely remarkably be detected at a higher temperature of 600 degrees C. The contents of phenolics and aliphatic hydrocarbons decreased with increasing the pressure for all three coals, and the contents of MAHs and PAHs showed inverse trends with the pressure. This could result from the enhanced reactions of cydizations of aliphatics and scissions of the C-OH bond in phenolics by elevated pressure. C-19 alkane and p-cresol as model compounds of aliphatics and phenolics were pyrolyzed under high pressures to verify this point. For a larger particle size of Fugu sub-bituminous and Liulin bituminous coals, the contents of aliphatics decreased remarkably, while the contents of MAHs and PAHs were distinctly augmented. This could be attributed to the intraparticle secondary reactions.; Tar compositions from pyrolysis of three ranks of Chinese coals of Hailaer lignite, Fugu sub-bituminous coal, and Liulin bituminous coal under different temperatures and pressures were analyzed via a pyrolyer combined with gas chromatography/mass spectrometry (Py-GC/MS). A nuclear magnetic resonance (NMR) analysis was performed to characterize the coals. It was found that the relative content of polycyclic aromatic hydrocarbons (PAHs) is not as sensitive to temperature as monocyclic aromatic hydrocarbons (MAHs), which increased with increasing the pyrolysis temperature. A decreasing trend of the content of acids/esters was observed for all three ranks of coals. However, the three coals exhibited quite different trends with the temperature in terms of the relative content of aliphatic hydrocarbons. MAHs and PAHs were predominant components in the tar from Liulin bituminous coal. The tars from Hailaer lignite and Fugu sub-bituminous coal were rich in phenolics, which can be detected at a low temperature of 400 degrees C. In contrast, the phenolics were much less in the tar from Liulin bituminous coal and can merely remarkably be detected at a higher temperature of 600 degrees C. The contents of phenolics and aliphatic hydrocarbons decreased with increasing the pressure for all three coals, and the contents of MAHs and PAHs showed inverse trends with the pressure. This could result from the enhanced reactions of cydizations of aliphatics and scissions of the C-OH bond in phenolics by elevated pressure. C-19 alkane and p-cresol as model compounds of aliphatics and phenolics were pyrolyzed under high pressures to verify this point. For a larger particle size of Fugu sub-bituminous and Liulin bituminous coals, the contents of aliphatics decreased remarkably, while the contents of MAHs and PAHs were distinctly augmented. This could be attributed to the intraparticle secondary reactions.
KeywordChromatography Mass-spectrometry Product Distribution Perhydrous Coals Behavior Vitrinites Lignite Oxygen
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/ef500986h
URL查看原文
Indexed BySCI
Language英语
WOS KeywordCHROMATOGRAPHY MASS-SPECTROMETRY ; PRODUCT DISTRIBUTION ; PERHYDROUS COALS ; BEHAVIOR ; VITRINITES ; LIGNITE ; OXYGEN
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000340808800012
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11389
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Gong, Xiaomin,Wang, Ze,Deng, Shuang,et al. Impact of the Temperature, Pressure, and Particle Size on Tar Composition from Pyrolysis of Three Ranks of Chinese Coals[J]. ENERGY & FUELS,2014,28(8):4942-4948.
APA Gong, Xiaomin,Wang, Ze,Deng, Shuang,Li, Songgeng,Song, Wenli,&Lin, Weigang.(2014).Impact of the Temperature, Pressure, and Particle Size on Tar Composition from Pyrolysis of Three Ranks of Chinese Coals.ENERGY & FUELS,28(8),4942-4948.
MLA Gong, Xiaomin,et al."Impact of the Temperature, Pressure, and Particle Size on Tar Composition from Pyrolysis of Three Ranks of Chinese Coals".ENERGY & FUELS 28.8(2014):4942-4948.
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