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

Abstract

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

CLC Number:

O657.31

TrendMD:

LI Dong Tao, LI Wen, SUN Qing Lei, LI Bao Qing . A Study on Hydrogen Bond in Coal Macerals with In situ Diffuse Reflectance FTIR by Using a New Experimental Method[J]. Chem. J. Chinese Universities, 2003, 24(4): 703.

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

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