燃料化学学报2017，Vol.45Issue(4)：385-393,9.
先锋褐煤可溶有机质中含氮化合物的组成和结构特征
Composition and structural characteristics of nitrogen-containing species in the soluble organic species of Xianfeng lignite
摘要
Abstract
Xianfeng lignite ( XL ) was firstly thermal dissolved in the isometric toluene/methanol mixed solvent at 300 ℃ in a stainless-steel autoclave to afford a soluble portion ( SPXL ) and a residue ( RXL ) , then the nitrogen forms in XL and RXL were characterized with X-ray photoelectron spectroscopy ( XPS) analysis, and the nitrogen-containing species ( NCSs) in SPXL were identified using gas chromatography/mass spectrometry ( GC/MS) and electrospray ionization Fourier transform ion cyclotron mass spectrometry ( ESI FT-ICR MS) analyses. The results show that the amount of nitrogen forms in XL is in the order of quaternary-N>pyridinic-N>pyrrolic-N, while quaternary-N in XL is easily dissolved out during thermal dissolution. In total 20 NCSs were detected in SPXL by GC/MS, and most of them are amines. Over three hundreds of NCSs were identified in SPXL by ESI FT-ICR MS, and most of them are the NCSs containing one or three nitrogen atoms. The NCSs containing one nitrogen atom are mainly dominated by N1 O1 , N1 O2 and N1 Ox S1-2 class species, while most of NCSs containing three nitrogen atoms are N3 Ox S1-2 class species ( x=1-12 ) . The double bond equivalent ( DBE ) values and carbon number of the NCSs containing one nitrogen atom increase with increasing number of oxygen atoms.关键词
褐煤/热溶/含氮化合物/碳数/等效双键数Key words
lignite/thermal dissolution/nitrogen-containing species/carbon number/DBE分类
化学化工引用本文复制引用
肖剑,赵云鹏,丁曼,魏贤勇,宗志敏..先锋褐煤可溶有机质中含氮化合物的组成和结构特征[J].燃料化学学报,2017,45(4):385-393,9.基金项目
The project was supporded by the 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 Priority Academic Program Development of Jiangsu Higher Education Institutions.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(MX201502)和江苏省高校优势学科项目资助 （ China University of Mining and Technology, 2015QNA25）
