Recent advances in coal characterization
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Gary E. Maciel; Charles E. Bronnimann; Antoni Jurkiewicz; Robert A. Wind; Vicky
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Article
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1991
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Elsevier Science
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English
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Ultralarge magic-angle spinning (MAS) systems (2.4-6.5 cm3) provide a sufficiently large increase in signal-to-noise ratio that 13C MAS experiments without cross-polarization (CP), as well as time-domain 13C CP/MAS studies, can be carried out expeditiously. The non-CP approach allows one to circumve