化工进展2016，Vol.35Issue(11)：3441-3446,6.DOI:10.16085/j.issn.1000-6613.2016.11.008
基于核磁-能谱实验的中变质烟煤煤尘低润湿性分析
Analysis of the low wettability about the bituminous coal dust with medium metamorphic grade based on NMR and XPS experiment
摘要
Abstract
In order to analyze the low wettability about the bituminous coal dust with medium metamorphic grade from the microscopic aspect,taking Zhaolou gas-fat coal in Juye coalfield as the example,the methods of nuclear magnetic resonance and X-ray photoelectron spectroscopy were utilized to achieve the microscopic molecular structures,and the molecular parameters’ influence on the wettability was investigated. According to the experimental results,the aromatic degree of the coaldust in Zhaolou mine was 0.77,and the content of aromatic structure was large,which mainly contained protonated aromatic ring . Moreover,chain alkanes and cycloalkanes side chains held the most part of aliphatic chain structures,also some methyl side chains were included. Ether group (C—O—C)was the first superficial oxygen-containing functional group of coal dust in Zhaolou mine. The second was carbonyl(C==O). The third was hydroxy(C—OH). The last was carboxyl(COOH). Moreover,the content ratio of the above four groups was about 4∶2∶2∶1.5. Not only the aromatic degree of the coal dust was high,the size of aromatic cluster was large and the condensation degree was high,but also the alkyl side chains were few and short,which made the coal’s molecular structure unit shows a strong hydrophobicity. However,the carboxyl(COOH)and hydroxy(C—OH),which contributed much to the surface hydrophilicity,only held 13.53% and 21.45% of the whole content of superficial oxygen-containing functional groups,respectively. Therefore,influenced by microscopic molecular structures,the coal dust of Zhaolou mine showed an overall characteristic of hydrophobicity and poor wettability.关键词
核磁共振/X射线光电子能谱/粉体/化学分析/润湿性Key words
NMR/XPS/powder/chemical analysis/wettability分类
矿业与冶金引用本文复制引用
周刚,徐翠翠,邱晗..基于核磁-能谱实验的中变质烟煤煤尘低润湿性分析[J].化工进展,2016,35(11):3441-3446,6.基金项目
国家自然科学基金重点项目（U1261205）、国家自然科学基金项目（51474139）、中国博士后科学基金特别资助项目（2016T90642）、中国博士后科学基金面上资助项目（2015M570602）、山东科技大学杰出青年科技人才支持计划（2014JQJH106）、青岛市博士后研究人员应用研究项目（2015194）、2014年度青岛市黄岛区科科技项目（2014-1-30）及山东省重点研发计划（攻关）（2016GSF120002）。 （）
