Variable temperature EPR studies of Illinois No. 6 coal treated with donor and acceptor molecules

Journal Article · Tue Dec 31 04:00:00 EST 1996 · Preprints of Papers, American Chemical Society, Division of Fuel Chemistry

OSTI ID:430316

Thompson, R L; Rothenberger, K S; Retcofsky, H L ^[1]

---

1. Department of Energy, Pittsburgh, PA (United States)

The structure of coal is believed to consist of extended networks of polyaromatic hydrocarbons linked by a wide variety of bonding interactions. In addition to covalent bonds, these networks contain non-covalent interactions, such as hydrogen bonding and charge-transfer interactions. Charge transfer, which can be studied by electron paramagnetic resonance (EPR) spectroscopy, involves the association of electron donors and acceptors. Both donor and acceptor sites are known to exist in coal, although acceptor sites are probably far less common. Such intermolecular associations may play an important role in determining the relaxation behavior of the coal matrix in certain solvents, an important consideration in coal liquefaction. In this work, we have studied by variable temperature EPR spectroscopy, Illinois No. 6 coal, it`s extracts, and chromatographic fractions of the extract that have been treated with strong electron donors and acceptors.

• OSTI ID: 430316
• Report Number(s): CONF-960376--
• Journal Information: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry Journal Issue: 2 Vol. 41; ISSN 0569-3772; ISSN ACFPAI
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BITUMINOUS COAL
COAL EXTRACTS
CURIE-WEISS LAW
ELECTRON SPIN RESONANCE
MOLECULAR STRUCTURE
RELAXATION
SOLVENTS