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
发表期刊Energy
卷号158页码:1192-1203
文章类型期刊论文
摘要

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.

关键词Hydrothermal Dewatering Low-rank Coal Combustion Ftir Ignition Burnout
DOI10.1016/j.energy.2018.06.052
收录类别SCI
语种英语
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9573
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Liu, GJ (Liu, Guijian)[ 1,2 ]
作者单位1.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
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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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