Change in the associated molecular structure of coals in pyridine/CS2 mixed solvents

H. Kumagai, K. Matuoka, K. Norinaga, T. Chiba, M. Sasaki

Research output: Contribution to journalArticle

Abstract

In order to evaluate noncovalent interactions in coal, change in the associated molecular structure of coals in pyridine/CS2 mixed solvents have been investigated. For bituminous coal, variation in L-band EPR spectra with mixing ratio of the solvents is in a close correspondence to that in equilibrium swelling ratio and in molecular mobility obtained from 1H-NMR. The EPR spectra for lignite show similar variation to that for bituminous coal, however, does not correlate with equilibrium swelling ratio and molecular mobility. Since the L-band EPR characteristics appear to reflect the situation of aromatic π-π and charge transfer interactions in coal, these results indicate that swelling in the mixed solvents proceed with the declining of non-covalent interaction, such as aromatic π-π and charge transfer interaction, in coal.

Original languageEnglish
Pages (from-to)289-291
Number of pages3
JournalUnknown Journal
Volume42
Issue number1
Publication statusPublished - 1997
Externally publishedYes

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Energy(all)

Cite this

Kumagai, H., Matuoka, K., Norinaga, K., Chiba, T., & Sasaki, M. (1997). Change in the associated molecular structure of coals in pyridine/CS2 mixed solvents. Unknown Journal, 42(1), 289-291.