HYSCORE study on coal radicals

Tadaaki Ikoma; Osamu Ito; Shozo Tero-Kubota; Kimio Akiyama

doi:10.1021/ef980130h

HYSCORE study on coal radicals

Tadaaki Ikoma, Osamu Ito, Shozo Tero-Kubota, Kimio Akiyama

Division of Organic- and Biomaterials Research

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

Hyperfine sublevel correlation spectroscopy (HYSCORE) spectra have been measured for the radicals in eight well-characterized Argonne Premium coals and their model compounds. The broad ¹H and ¹³C hyperfine spectra of all coals were detected at room temperature. The hyperfine structure was analyzed by the comparison with model radicals and semiempirical molecular orbital calculations. The main coal radicals are considered as two-dimensionally condensed π radicals with more than seven aromatic rings. The ¹³C/¹H ratio of the hyperfine spectra increases with coal rank, suggesting a new index of coal rank.

Original language	English
Pages (from-to)	1363-1368
Number of pages	6
Journal	Energy and Fuels
Volume	12
Issue number	6
DOIs	https://doi.org/10.1021/ef980130h
Publication status	Published - 1998 Jan 1

ASJC Scopus subject areas

Chemical Engineering(all)
Fuel Technology
Energy Engineering and Power Technology

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10.1021/ef980130h

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Ikoma, T., Ito, O., Tero-Kubota, S., & Akiyama, K. (1998). HYSCORE study on coal radicals. Energy and Fuels, 12(6), 1363-1368. https://doi.org/10.1021/ef980130h

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AB - Hyperfine sublevel correlation spectroscopy (HYSCORE) spectra have been measured for the radicals in eight well-characterized Argonne Premium coals and their model compounds. The broad 1H and 13C hyperfine spectra of all coals were detected at room temperature. The hyperfine structure was analyzed by the comparison with model radicals and semiempirical molecular orbital calculations. The main coal radicals are considered as two-dimensionally condensed π radicals with more than seven aromatic rings. The 13C/1H ratio of the hyperfine spectra increases with coal rank, suggesting a new index of coal rank.

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