In situ Diffuse Reflectance FTIR Study on Water in Lignite

Abstract

Abstract: With a new method of diffuse reflectance FTIR(DRIFT)(using the single channel spectrum of dry coal at 140 ℃ as the background), the water in two lignites was studied for the first time. The results show that the content of water is directly proportional to the integral area of the corresponding wave number range in the spectra of the water remained. Based on the calculated hydrogen bonding energy of the water in dry coal, the water-coal interaction(hydrogen bonding) was discussed. Moreover, according to the research result of DRIFT, the water in coal was classified into two forms: one is the free water or the water which is weakly hydrogen-bonded with coal and mainly removed below 80 ℃; and the other is the water tightly bound with coal surface through strong hydrogen bonding, which is removed above 80 ℃.

Key words: Hydrogen bonding, Water, In situ diffuse reflectance FTIR, Lignite

CLC Number:

O657.31

TrendMD:

LI Dong-Tao, LI Wen, LI Bao-Qing . In situ Diffuse Reflectance FTIR Study on Water in Lignite[J]. Chem. J. Chinese Universities, 2002, 23(12): 2325.

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In situ Diffuse Reflectance FTIR Study on Water in Lignite

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