云南褐煤结构的FTIR分析  

FTIR analysis of Yunnan Lignite

作　　者：韩峰[1,2,3] 张衍国[1,2,3] 蒙爱红[1,2,3] 李清海[1,2,3] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京100084 [2]清华大学二氧化碳资源化利用与减排技术北京市重点实验室,北京100084 [3]清华大学热能工程系,北京100084

出　　处：《煤炭学报》2014年第11期2293-2299,共7页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2011CB201502);云南省科技创新强省计划资助项目(2010AD010)

摘　　要：煤的结构与转化特性密切相关,为了更好地利用云南褐煤,借助傅里叶变换红外光谱仪对云南地区典型的6种褐煤进行分析,采用仪器自带的软件对样品的红外光谱曲线进行分峰拟合,结果表明,煤中羟基、脂肪烃和含氧官能团可以分别用6个、5个和18个Gaussian峰进行拟合,根据分峰拟合的结果可以进一步得到煤的FTIR结构参数。从官能团的分析中可以看到,褐煤的氧绝大多数以多种官能团的形式存在(如酚羟基、羧基、羰基和甲氧基等),这些官能团对褐煤的热解有重要影响。对6种煤样腐植组的平均随机反射率进行测试,对6种煤样的微观结构与腐植组平均随机反射率的关联性进行探讨。Coal structure is closely related to its conversion characteristics. In order to make better use of Yunnan Lignite,six kinds of typical lignite coals from Yunnan region were analyzed using Fourier transform infrared spectroscopy（ FTIR）. Curve-fitting analysis was employed to characterize the infrared spectrum. The results show that the hydroxyl,aliphatic and oxygen-containing structures are well fitted with six,five and eighteen Gaussians,respectively. Also,several structural parameters were obtained by further calculation based on FTIR data and curve-resolved bands. From the functional group analysis,it can be seen that most of the oxygen in lignite exist in the forms of phenolic hydroxyl,carboxyl,carbonyl and methoxyl,which have impact on its pyrolysis characteristics. Meanwhile,the mean reflectance of huminite of different coals were presented,and their relevance to the structure parameters were studied.

关 键 词：云南褐煤 FTIR 峰拟合 腐植组反射率 

分 类 号：TQ533[化学工程—煤化学工程]