摘要
利用ＦＴＩＲ分析和合适的光谱分峰程序，把煤的红外吸收光谱分解为３８个Ｇａｕｓｓｉａｎ分布的峰。基于煤中含氧官能团在红外光谱中有吸收，并结合煤中含氧官能团的化学分析，确定了含氧官能团与其吸收强度之间的关系。对我国煤化程度有显著差异的１８种煤的红外光谱的研究表明，羧基、羟基和其它含氧官能团的氧含量均随煤化程度的增加而减少。
Fourier transform infrared (FTIR) spectroscopy is potentially a powerful tool for the charaterization of coal Considering the functional group's absorption in the FTIR spectra of coals, a reasonable program for curve fitting is used to synthesize the IR spectra The synthesis is accomplished by adding 38 absorption peaks with Gaussian shapes, the peaks are separaed according to the identified functional group The hydroxyl concentration is measured from the absorption of 3200cm -1 , carboxylic acid group from the absorption of 1710cm -1 , and other oxygen-containing functional-groups from the absorption of 1300～1000cm -1 Three interesting relationships have been observed between the absorbencies and concentration of oxygen-containing functional groups determined by the chemical analysis FTIR study on 18 typical Chinese coals with different ranks showed that oxygen in carboxyl, hydroxyl and other oxygen-containing functional-groups decreased with increasing coal rank, and concentration of oxygen-containing functional groups can be used for the measurement of coal rank
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1999年第4期335-339,共5页
Journal of Fuel Chemistry and Technology
关键词
IR光谱
含氧官能团
吸收强度
煤化程度
红外光谱
FTIR spectroscopy, oxygen-containing functional group, absorbency, coal rank
