Mineralogical and geochemical characteristics of the Permian coal from the Qinshui Basin, northern China, with emphasis on lithium enrichment

doi:10.1016/j.coal.2019.103254

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋地质与环境重点实验室

	Mineralogical and geochemical characteristics of the Permian coal from the Qinshui Basin, northern China, with emphasis on lithium enrichment
	Wang, Xiaomei 2; Wang, Xiaoming 2; Pan, Zhejun 3; Pan, Wenhao 4; Yin, Xuebo 1; Chai, Pancun 2; Pan, Sidong 2; Yang, Qin 5
刊名	INTERNATIONAL JOURNAL OF COAL GEOLOGY
	2019-10-01
卷号	214 页码:14
关键词	No. 3 Coal NH4-illite Kaolinite Lithium Sequential chemical extraction procedure Qinshui Basin
ISSN号	0166-5162
DOI	10.1016/j.coal.2019.103254
通讯作者	Pan, Zhejun(zhejun.pan@csiro.au)
英文摘要	Comprehensive information about the concentrations, distribution, and modes of occurrence of elements in coal are important from the environmental and economic point of view. Although a great number of previous studies have investigated the geology of coalbed methane in the Qinshui Basin, only a few studies focused on the inorganic constituents in coal. More specifically, the mode of occurrences of valuable element Li in the No. 3 Coal is still unclear, although Li was found enriched. In this study, we present mineral characteristics, as well as multi-element data on the Permian No. 3 Coal from the Sucun and Gaohe Mines, Changzhi City, southern Qinshui Basin. The studied coals are characterized by low- to medium-ash yield (Ad = 5.72%-28.18%, 12.34% on average), low volatile matter yield (Vdaf = 8.49-15.17%, 10.96% on average), suggesting a low volatile bituminous coal to semi-anthracite. NH4-illite and kaolinite are the main minerals in the coals detected by XRD, and trace amount of minerals calcite, dolomite, quartz, pyrite and diaspore can also be found. The major elements of the studied No. 3 coals are dominated by SiO2 and Al2O3, ranging 2.49-16.45 wt% and 2.13-12.9 wt% (on a whole-coal basis), respectively. Li is enriched in the No. 3 coals (5 < CC < 10). Li in the studied coals is positively correlated with Al2O3, SiO2 and ash yield, with the correlation coefficients (r) of 0.86, 0.8, and 0.78, respectively. The sequential leaching results show that 96.6%-99.4% of Li in the coals was removed by HF. The proportion of Li present as the ion-exchange form and water soluble form accounts for < 1.1% and < 0.29% of the total Li respectively in the coals. Li in the studied coals are probably bound to clay minerals kaolinite and illite, residing mainly in non-exchangeable positions, either in the octahedral or pseudo-hexagonal sites.
资助项目	National Natural Science Foundation of China[41572143] ; National Natural Science Foundation of China[41202114] ; National Natural Science Foundation of China[41101098] ; National Key Research and Development Program of China[2018YFC0604202] ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)[CUGL170220]
WOS研究方向	Energy & Fuels ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000495519600006
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/164859]
专题	海洋研究所_海洋地质与环境重点实验室
通讯作者	Pan, Zhejun
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China 2.China Univ Geosci, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Hubei, Peoples R China 3.CSIRO Energy Business Unit, Private Bag 10, Clayton, Vic 3169, Australia 4.Shenzhen Water Planning & Design Inst Co Ltd, Shenzhen 518000, Peoples R China 5.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaomei,Wang, Xiaoming,Pan, Zhejun,et al. Mineralogical and geochemical characteristics of the Permian coal from the Qinshui Basin, northern China, with emphasis on lithium enrichment[J]. INTERNATIONAL JOURNAL OF COAL GEOLOGY,2019,214:14.
APA	Wang, Xiaomei.,Wang, Xiaoming.,Pan, Zhejun.,Pan, Wenhao.,Yin, Xuebo.,...&Yang, Qin.(2019).Mineralogical and geochemical characteristics of the Permian coal from the Qinshui Basin, northern China, with emphasis on lithium enrichment.INTERNATIONAL JOURNAL OF COAL GEOLOGY,214,14.
MLA	Wang, Xiaomei,et al."Mineralogical and geochemical characteristics of the Permian coal from the Qinshui Basin, northern China, with emphasis on lithium enrichment".INTERNATIONAL JOURNAL OF COAL GEOLOGY 214(2019):14.