Chemical Industry and Engineering Progress ›› 2016, Vol. 35 ›› Issue (11): 3441-3446.DOI: 10.16085/j.issn.1000-6613.2016.11.008

Previous Articles     Next Articles

Analysis of the low wettability about the bituminous coal dust with medium metamorphic grade based on NMR and XPS experiment

ZHOU Gang1,2,3, XU Cuicui1,2, QIU Han1,2   

  1. 1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, Shandong, China;
    2. College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China;
    3. Energy Flagship, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 883, Kenmore, Brisbane, QLD 4069, Australia
  • Received:2016-05-23 Revised:2016-06-24 Online:2016-11-05 Published:2016-11-05

基于核磁-能谱实验的中变质烟煤煤尘低润湿性分析

周刚1,2,3, 徐翠翠1,2, 邱晗1,2   

  1. 1. 山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地, 山东 青岛 266590;
    2. 山东科技大学矿业与安全工程学院, 山东 青岛 266590;
    3. 澳大利亚联邦科学与工业研究组织能源研究分院, 昆士兰 布里斯班 4069
  • 通讯作者: 徐翠翠,博士研究生,主要从事煤矿安全管理与粉尘防治方面的研究。E-mail:xucuicui519@163.com。
  • 作者简介:周刚(1979-),男,工学博士(后),副教授,主要从事矿井通风与防尘方面的教学与科研工作。E-mail:ahsdzhougang@163.com。
  • 基金资助:

    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)。

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 coal dust 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.

Key words: NMR, XPS, powder, chemical analysis, wettability

摘要: 为从微观角度分析中变质烟煤的低润湿特性,以巨野煤田赵楼气肥煤为例,选用核磁共振(NMR)与X射线光电子能谱(XPS)手段对其微观分子结构进行实验,并分析了分子结构参数对其润湿性的影响规律。结果表明,赵楼气肥煤煤尘的芳香度为0.77,芳香结构含量较高,且主要以质子化芳环为主;脂肪链结构中以链状烷烃和环烷烃侧链为主,且存在一定的甲基侧链;煤尘表面含氧官能团主要为醚基(C—O—C),其次为羰基(C=O)与羟基(C—OH),含量最少的是羧基(COOH),上述4种含氧官能团含量之比约为4∶2∶2∶1.5。赵楼气肥煤煤尘不仅芳香度较高,芳香簇尺寸较大,缩合度偏高,而且烷基侧链少而短,导致煤尘分子结构单元表现出较强的疏水性;而对表面亲水性贡献较大的羧基(COOH)和羟基(C—OH)含量却只占表面含氧官能团总量的13.53%、21.45%。因此,受微观分子结构的影响,赵楼气肥煤煤尘总体表现出疏水性的特点,润湿性较差。

关键词: 核磁共振, X射线光电子能谱, 粉体, 化学分析, 润湿性

CLC Number: 

京ICP备12046843号-2;京公网安备 11010102001994号
Copyright © Chemical Industry and Engineering Progress, All Rights Reserved.
E-mail: hgjz@cip.com.cn
Powered by Beijing Magtech Co. Ltd