Citation: LEI Zhi-ping, ZHANG Su-fang, ZHANG Yan-qiu, SHUI Heng-fu, WANG Zhi-cai, REN Shi-biao. Thermal extraction of lignite in ionic liquid and separation and characterization of its extracts[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(7): 814-818. shu

Thermal extraction of lignite in ionic liquid and separation and characterization of its extracts

1.
School of Chemistry & Chemical Engineering, Anhui Key laboratory of Coal Clean Conversion & Utilization, Anhui University of Technology, Ma'anshan 243002, China

Corresponding author: LEI Zhi-ping,
Received Date: 29 May 2013
Available Online: 23 June 2013
Fund Project: 国家自然科学基金(U1261208, 21176001, 20876001, 21076001, 20936007) (U1261208, 21176001, 20876001, 21076001, 20936007) 国家重点基础研究发展规划(973计划, 2011CB201300) (973计划, 2011CB201300)

Based on the high efficient depolymerization performance of lignite in ionic liquids, thermal dissolution behaviors of 3 lignites Xianfeng (XL), Xilinggele (XLGL) and Shengli (SL) were investigated. And the thermally dissolved products from XL extracted by ionic liquid 1-butyl-3-methyl imidazole chloride ([Bmim]Cl) were separated and analyzed to explore the structure information of the lignite. It is found that the extraction yield of 3 lignites in ionic liquid [Bmim]Cl is significantly different under the same extraction conditions. The order of extraction yield is: XL > SL > XLGL. The thermally dissolved products of XL during extraction in [Bmim]Cl can be separated into acetone-soluble (15.9%), pyridine-soluble (56.0%), and pyridine-insoluble (28.1%), respectively. Acetone soluble (AS) mainly contains long chain fatty compounds, tricyclic aromatics and tetracyclic aromatic compounds. Pyridine soluble (PS) and pyridine insoluble (PI) mainly contain tricyclic aromatics and pentacyclic aromatics.
- lignite,
- ionic liquid,
- thermal dissolution
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沈阳化工大学材料科学与工程学院沈阳 110142