P-2.^1Hおよび^<13>C固体NMRを用いた石炭中の芳香族クラスターサイズの推定(Poster Session)

抄録

Measurements of solid-state NMR of coal were conducted to estimate the average size of aromatic cluster in it. Firstly, the carbon distribution was obtained from SPE/MAS ^<13>C-NMR spectra and their data analysis. Secondary, ^1H-CRAMPS NMR spectra gave the hydrogen aromaticity of coal. Combination use of the hydrogen aromaticity and elemental analysis data could afford the amount of tertiary aromatic carbon. The parameter of χ_b, the mole fraction of aromatic bridgehead carbons in all aromatic carbons, could be derived from above NMR data and elemental analysis of coal. χ_b is directly correlated to the number of aromatic carbon atoms per aromatic cluster, C. The value of C ranged from 7.3 for brown coal to 22.6 low volatile bituminous coal.