燃料化学学报2017，Vol.45Issue(1)：9-14,6.
白音华褐煤可溶有机质的组成和结构特征
Composition and structural characteristics of soluble organic species in Baiyinhua lignite
摘要
Abstract
Baiyinhua lignite was sequentially extracted with petroleum ether, cyclohexane, carbon disulfide, acetone, methanol and isometric acetone/carbon disulfide mixed solvent affording extracts, i. e. E1-E6 , then extraction residue was sequentially thermal dissolved using methanol, toluene and isomeric methanol/toluene mixed solvent affording soluble portions ( SPs) , i. e. SP1-SP3 . The composition and structural characteristics of extracts and SPs were characterized with Fourier transform infrared ( FT-IR) spectroscopy, gas chromatography/mass spectrometer ( GC/MS) , direct analyze in real time mass spectrometer ( DART-MS) . The total extracts yield and SPs yield of BL are 9. 37% and 21. 84%, respectively. There exist strong adsorption peaks ascribed to hydroxyl in the FT-IR spectra of E1 and E6 , while the intensity of adsorption peaks ascribed to aliphatic C-H in the FT-IR spectrum of E1 is obviously higher than that of other extracts. There are similar FT-IR spectra among those 3 SPs, whereas the intensity of adsorption peak originated from hydroxyl in the FT-IR spectra of SP1 and SP3 is higher than those of SP2 . The compounds GC/MS detected in E1 and E5 are dominated with alkanes and arenes, respectively, and the content of oxygen-containing compounds ( OCCs) in E5 are more than that in E1 . The compounds in the 3 SPs are composed of alkanes and arenes, while the contents of OCCs, such as phenols, ketones and esters, in SP3 are higher than those in SP1 and SP2 . Many compounds with high polarity and low volatility which could not identified by GC/MS were detected using DART-MS. The carbon number and double bond equivalent ( DBE ) of the compounds with high content in SPs mainly distribute in 10-25 and 2-16 , respectively, and the DBE increases with carbon number increasing.关键词
褐煤/分级萃取/连续热溶/气相色谱/质谱/实时直接分析质谱Key words
lignite/solvent extraction/thermal dissolution/GC/MS/DART-MS分类
化学化工引用本文复制引用
杜姣姣,赵云鹏,田由甲,张迪..白音华褐煤可溶有机质的组成和结构特征[J].燃料化学学报,2017,45(1):9-14,6.基金项目
The project was supported by the National Natural Science Foundation of China (21206188), Fundamental Research Funds for the Central Universities (China University of Mining and Technology,2015QNA25), Open Foundation from State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and Ministry Education (MKX201502), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.国家自然科学基金(21206188),中央高校基本科研业务费(中国矿业大学,2015QNA25),煤科学与技术省部共建国家重点实验室培育基地开放课题(MKX201502)和江苏省高校优势学科项目资助 （21206188）
