FTIR Study of Hydrogen Bonds in Coal under Drop Weight Impact Testing
LI Cheng-wu1, WANG Jin-gui1, XIE Bei-jing1*, DONG Li-hui1, SUN Ying-feng1, CAO Xu2
1. School of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China 2. Institute of High Energy Physics Chinese Academy of Sciences, Beijing 100049, China
Abstract：There are many hydrogen bonds in coal, which affect the chemical structure and properties of coal. FTIR has been applied to the characterization study of the hydrogen bonds of Dongpang coals, which were under drop weight impact. There exists five kinds of hydrogen bonds in the coal: free OH groups, OH…π, OH…OH, cyclic OH tetramers and OH…N. Absorption strength of intermolecular hydrogen bonds markedly declined after impact. Free OH groups mechanical-power chemical reacted in drop weight impact testing. The infrared spectrum were curve-resolved into their component bands. The absorption strength of various hydrogen bonds decreased with the increase of impact energy, but the trend was slowing. By statistical relationship between then, we find then complying with power function relationship. By comparing the exponents of fitted equations, we concluded that failure sensitivity sequence of hydrogen bonds to the impact: free OH groups>cyclic OH tetramers>OH…N>OH…π>OH…OH.
李成武1，王金贵1，解北京1*，董立辉1，孙英峰1，曹 旭2. 阶梯式循环冲击下煤中氢键红外光谱变化规律[J]. 光谱学与光谱分析, 2014, 34(11): 2961-2967.
LI Cheng-wu1, WANG Jin-gui1, XIE Bei-jing1*, DONG Li-hui1, SUN Ying-feng1, CAO Xu2. FTIR Study of Hydrogen Bonds in Coal under Drop Weight Impact Testing. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(11): 2961-2967.
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