IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Hydrothermal dewatering of low-rank coals: Influence on the properties and combustion characteristics of the solid products
Ullah, H (Ullah, Habib)[ 1,2 ]; Liu, GJ (Liu, Guijian)[ 1,2 ]; Yousaf, B (Yousaf, Balal)[ 1,2 ]; Ali, MU (Ali, Muhammad Ubaid)[ 1 ]; Abbas, Q (Abbas, Qumber)[ 1 ]; Zhou, CC (Zhou, Chuncai)[ 1 ]; Rashid, A (Rashid, Audil)[ 3 ]
2018-09-01
Source PublicationEnergy
Volume158Pages:1192-1203
Subtype期刊论文
Abstract

The presence of increased moisture content, low energy density and maximum spontaneous combustion tendency has raised serious environmental issues, which are obstacles to large scale utilization of coals. Hydrothermal dewatering (HTD) is a promising method for upgrading low rank coals (LRCs). The influences of HTD, executed at different temperatures on solid product yield, removal rate of elements, organics and inorganics, and combustion characteristics in LRCs were studied. HTD treatment of LRCs was carried out in 2 L cylindrical autoclave at 200–300 °C for 1 h. For upgraded coals, the inherent moisture and oxygen content decreased significantly while fixed carbon content and calorific value increased. FTIR results indicate the conversion of LRCs near to high-rank coals (HRCs). The organic matter was removed due to loss of Methylene, Methyl groups and O-containing functional groups, whereas inorganic matter was removed mainly in the forms of Fe and Ca-containing minerals. The upgraded coals had higher ignition and burnout temperatures, while their combustion was shifted and delayed toward higher temperature zone. Activation energy of treated coals increased in ignition stage while decreased in combustion segment. Prominent changes were found in coal structure, composition, rank, and combustion characteristics at HTD temperature of 300 °C.

KeywordHydrothermal Dewatering Low-rank Coal Combustion Ftir Ignition Burnout
DOI10.1016/j.energy.2018.06.052
Indexed BySCI
Language英语
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9573
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorLiu, GJ (Liu, Guijian)[ 1,2 ]
Affiliation1.CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China,Hefei 230026, PR China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi'an, Shaanxi 710075, China;
3.Department of Environmental Sciences, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi, 46000, Pakistan
Recommended Citation
GB/T 7714
Ullah, H ,Liu, GJ ,Yousaf, B ,et al. Hydrothermal dewatering of low-rank coals: Influence on the properties and combustion characteristics of the solid products[J]. Energy,2018,158:1192-1203.
APA Ullah, H .,Liu, GJ .,Yousaf, B .,Ali, MU .,Abbas, Q .,...&Rashid, A .(2018).Hydrothermal dewatering of low-rank coals: Influence on the properties and combustion characteristics of the solid products.Energy,158,1192-1203.
MLA Ullah, H ,et al."Hydrothermal dewatering of low-rank coals: Influence on the properties and combustion characteristics of the solid products".Energy 158(2018):1192-1203.
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