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Solubilization of Taiheiyo coal under mild conditions without gaseous hydrogen: catalysis by trifluoromethanesulfonic acid by Kiyoyuki Shimizu; Hironori Karamatsu; Atsushi Inaba; Akira Suganuma; Ikuo Saito is a scholarly article available to read on EtoBox.

What is Solubilization of Taiheiyo coal under mild conditions without gaseous hydrogen: catalysis by trifluoromethanesulfonic acid about?

## Trifluoromethanesulfonic acid (TFMS) was found to convert coal almost completely to pyridine-solubles in the presence of isopentane at 150°C in 3 h under autogenous pressure of 6.G6.8 MPa. The chemical structure of the benzene-soluble and THF-insoluble-pyridine-soluble fractions varied with the acid concentration. Lower acid concentrations provided high aromaticity and rich H,, and H,, while higher acid concentrations gave higher H, and H,. The solubilized coal fractions bore many oxygen functional groups in spite of depolymerization. The ether bonds remained in the pyridine-insoluble fraction, resulting in a high molecular weight. Intermolecular hydrogen bonding of oxygen functional groups appears to be another cause of limited solubility of this fraction.

Author

Kiyoyuki Shimizu; Hironori Karamatsu; Atsushi Inaba; Akira Suganuma; Ikuo Saito

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0016-2361)

Published

1995

Language

EN