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Title: Estimation of the average aromatic cluster size based on solid-state NMR measurement of coal
Other Titles: 石炭の固体NMR測定による芳香族クラスター平均サイズの推定
Authors: Kidena, Koh
Murata, Satoru
Artok, Levent
Nomura, Masakatsu
Keywords: Carbon
Nuclear magnetic resonance spectroscopy
Average aromatic cluster size
Issue Date: 1999
Publisher: Japan Institute of Energy
Source: Kidena, K., Murata, S., Artok, L., and Nomura, M. (1999). Estimation of the average aromatic cluster size based on solid-state NMR measurement of coal. Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy, 78(10), 874-876. doi:10.3775/jie.78.869
Abstract: Measurements of solid-state NMR of eight Argonne Premium Coal Samples were conducted to estimate the average aromatic cluster size in these coals. Firstly, the carbon distribution was obtained from SPE/MAS 13C-NMR. 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. In this study, the value of C varied from 10 (corresponding to the size of naphthalene) for Beulah-Zap and Wyodak coals to 23 (corresponding to the size of coronene) for Pocahontas No. 3 coal.
Description: This article is the original language of Japanese.
ISSN: 0916-8753
Appears in Collections:Chemistry / Kimya
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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