微波辅助抽提煤的条件优化及抽提物和残煤的分析  

Optimization of microwave-assisted extraction coal and analysis of soluble fraction and residue

作　　者：陈红[1,2] 葛岭梅[1] 李建伟[1] 

机构地区：[1]西安科技大学化学与化工系,陕西西安710054 [2]沈阳工业大学石油化工学院,辽宁辽阳111003

出　　处：《煤炭学报》2009年第4期546-550,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(40472082)

摘　　要：微波辅助下,以四氢呋喃为溶剂采用正交试验方法考察了抽提温度、时间、溶剂用量及煤粒度对神府煤抽提率的影响,结果显示,影响抽提率最主要的因素是抽提温度.采用气相色谱/质谱联用技术分析了抽提物的化学组成,利用高分辨率13C固体核磁共振分析了抽提残煤的结构变化.结果表明:抽提物主要由脂肪烃、芳烃和含杂化合物组成,其中脂肪烃以正构烷烃居多,芳烃主要是苯系、萘系和菲系等化合物,杂原子化合物以含氧衍生物为主;核磁共振分析结果显示,抽提残煤的芳构化程度高于神府脱灰煤,但煤的大分子结构没有被破坏.To investigate the effect of temperature, irradiation time, the ratio of solvent volume to coal mass and granularity of coal on extraction yield of Shenfu coal, extraction with tetrahydrofuran was conducted using an orthogonal test under microwave-assisted extraction. Extraction results indicate that temperature is the most important factors affected the extraction yield. The tetrahydrofuran soluble fraction was analyzed with GC/MS and residue was analyzed by high-resolution solid 13C nuclear magnetic resonance （NMR）. The results show that tetrahydrofuran extracts of Shenfu coal mainly consist of aliphatic hydrocarbons among which n-alkanes are majority, aromatic hydrocarbons in which benzene, naphthalene and phenanthrene are dominant components and heteroatom compounds. Heteroatom compounds are composed of oxygen-containing compounds, of which the majority are ketones. The analyses of 13 C - NMR spectrum demonstrate that the aromaticity of residue is higher than that of Shenfu coal and macromolecule structure of Shenfu coal is not broken.

关 键 词：神府煤 微波辅助抽提 正交试验 GC/MS分析 ^13C-NMR分析 

分 类 号：TQ531.5[化学工程—煤化学工程]