39.FTirとDSCを用いた石炭内水素結合の定量的評価の試み

概要

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A new method was presented to estimate the hydrogen bondings in coal using DSC and FTir. Utilizing the equations proposed by Drago et al. for relating the OH bond energy, δE_<OH>, the energy of formation of a hydrogen bonding, E_<HB>, and the OH wavenumber shift on adduct formation of phenol with donor, an equation was developed for relating the enthalpy difference, ΔH, and the OH wavenumber shift between raw coal and a coal in a different state. Since both ΔH and Δν_<OH> are measurable, an equation relating E_<HB> and Δν_<OH> could be established. Using this equation we estimated the strength distribution of hydrogen bonding in Taiheiyo coal. The peak value of hydrogen bondings of the coal is about 20kJ/mol-OH. The change in the hydrogen bondings through heat treatment was well represented by the method.
1996-10-28