高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (4): 703.

• 论文 • 上一篇    下一篇

原位漫反射红外光谱中采用新的实验手段研究煤岩显微组分中的氢键

李东涛, 李文, 孙庆雷, 李保庆   

  1. 中国科学院山西煤炭化学研究所煤转化国家重点实验室, 太原 030001
  • 收稿日期:2002-07-24 出版日期:2003-04-24 发布日期:2003-04-24
  • 通讯作者: 李E-mai文(1966年出生),男,博士,研究员,主要从事煤化学基础研究.E-mail:liwen@sxicc.ac.cn E-mail:liwen@sxicc.ac.cn
  • 基金资助:

    国家自然科学青年基金(批准号:29906012)

A Study on Hydrogen Bond in Coal Macerals with In situ Diffuse Reflectance FTIR by Using a New Experimental Method

LI Dong Tao, LI Wen, SUN Qing Lei, LI Bao Qing   

  1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
  • Received:2002-07-24 Online:2003-04-24 Published:2003-04-24

PDF (PC)

被引次数

16

摘要： 首次提出采用小瓷片反应器,结合增大载气流量的方法进行产生挥发组分固体的原位漫反射红外光谱实验,研究了两种煤的镜质组和丝质组中的氢键分布及热稳定性.两种显微组分间氢键分布的规律相似;镜质组中SH—N、羧酸二聚体和自缔合羟基等的热稳定性比丝质组中的高.但对OH—N、羟基四聚体和OH—OR2的热稳定性随煤岩组分的变化无明显规律;随着温度的升高,OH-π含量先升高后降低,于350～380℃达最大值,其中镜质组OH-π的含量增加较快.显微组分中氢键的变化规律反映了其结构上的差异.

关键词: 煤, 煤岩显微组分, 氢键, 原位漫反射红外光谱, 小瓷片反应器

Abstract: A new method using the small porcelain as the reactor combined with increasing the flow rate of carrier gas was proposed, which has the advantage of excluding the condensation of volatile produced by heated solid samples on the windows during in situ diffuse reflectance FTIR experiment. Moreover, the feasibility of this method was also discussed. Using this method, the distribution and thermal stability of hydrogen bonds in coal macerals obtained from two coals were studied. The results show that the differences between the distribution of hydrogen bonds formed by hydroxyl group in the macerals of two coals were very similar; For the vitrinites, the thermal stability of SH-N, carboxylic acid dimmers and self associated OH is higher than those in inertinites, but for OH-N and hydroxyl tetramers and OH-OR2, there is no obvious laws. For OH-π, its content was increased with increasing the temperature until 350-380 ℃, and then decreased with further heating. The variation of hydrogen bonds in macerals reflects the difference in their structure.

Key words: Coal, Macerals, Hydrogen bond, Diffuse reflectance FTIR, Porcelain reactor

中图分类号: 

TrendMD: