โ Scribed by Kiyoyuki Shimizu; Hironori Karamatsu; Atsushi Inaba; Akira Suganuma; Ikuo Saito
No coin nor oath required. For personal study only.
acid (TFMS) was found to convert coal almost completely to pyridine-solubles in the presence of isopentane at 150ยฐC 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.
๐ SIMILAR VOLUMES
Relationship between fusibility and mineral and chemical composition of coal ashes