煤及其液化产物的^(13)C CP/MAS/TOSS NMR和ESR研究  

Coal and Its Liquefaction Products Studied by NMR and ESR Spectroscopy

作　　者：宋瑞[1] 潘铁英[1] 史新梅[1] 周丽芳[1] 徐熠[2] 张德祥[2] 高晋生[2] 

机构地区：[1]华东理工大学分析测试中心,上海200237 [2]华东理工大学资源与环境工程学院,上海200237

出　　处：《波谱学杂志》2010年第2期206-213,共8页Chinese Journal of Magnetic Resonance

基　　金：国家重点基础研究发展计划("973"计划)资助项目(2004CB217601);国家自然科学基金资助项目(20476029)

摘　　要：研究煤及其液化产物的成分和含量的变化是控制煤液化工艺的的重要因素之一.该文章用元素分析,13C CP/MAS/TOSS NMR和ESR的方法分析了不同煤化度的6种原煤,结果表明,不同煤阶的原煤的结构存在较大的差异,原煤的芳香度随着含碳量的增加而变大,芳烃碳原子百分率随芳香度增大而增大,芳香度增大则自由基浓度增大,光谱分裂因子(Landeg值)减小;另外,通过对其中5种原煤及其在CO+H2O气氛下液化得到的产物的ESR分析,推测并验证了原煤在液化阶段中的反应机理,不同煤阶的原煤在反应过程中的变化有所差异,从中可以推测并得到了一些原煤结构方面的信息.Studying the coal and its liquefaction products provides important information about how to control coal liquefaction. In this study, six kinds of coal were analyzed by element analysis, 13C CP/MAS/TOSS NMR spectroscopy and ESR spectroscopy. The results showed that the aromaticity of the coal increased with the carbon content. Higher aromaticity of the coal was associated with higher concentrations of aromatic carbons and free radicals, but with lower g factor. The liquefaction products of coal were analyzed by ESR spectroscopy, and the results were used to estimate structural information of the coal and liquefaction mechanisms.

关 键 词：13C CP/MAS/TOSS NMR ESR 不同煤阶的煤 芳香度 液化产物 

分 类 号：O482.53[理学—固体物理]