19 固体NMR法による石炭無機成分の化学構造分類(褐炭利用,熱分解ガス,鉱物構造)

抄録

It is important to obtain not only organic but also inorganic matter (minerals) in raw coal for effective coal utilization and examination of geological processes. Nuclear Magnetic Resonance (NMR), a very useful technique for evaluating short- and medium-range structure of each nuclide, has been applied to structural analysis of inorganic matter in this study. We successfully identify Al-containing minerals (kaolin, montmorillonite, muscovite and alumina) by high-magnetic field (16.4 T)^<27> Al MQMAS NMR, which enables to obtain high-resolution spectra for half-integer quadrupolar nuclides, and categorize coal samples into five groups based on total Si and Al contents in raw coal. In addition, the relationship between mineral types and chemical composition of organic matter has been discussed.