NMR Characterization of Solid Fossil Fuels. Coal and Oil Shale
作者： Gary E. Maciel , Oktay Erbatur
DOI: 10.1007/978-94-011-0756-3_8
关键词:
摘要: 1H and 13C NMR experiments based on magic-angle spinning (MAS) other techniques are enormously useful in the characterization of coals oil shales, even though level chemical shift resolution achieved is limited. The most popular technique CP-MAS, easy efficient, but requires detailed relevant spin dynamics for quantitation. MAS that rely direct polarization (DP) via spin-lattice relaxation (DP-MAS) more time consuming, quantitative determinations straightforward. Large-volume rotors render quantitation by both CP-MAS DP-MAS techniques, as well 1H-13C dipolar-dephasing elucidation CH CH2 groups, routinely feasible.
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