J. Ripmeester, R. E. Hawkins, J. Macphee
May 1, 1986
Citations
0
Influential Citations
13
Citations
Journal
Fuel
Abstract
The interaction between pyridine-15N and both fresh and oxidized coal was studied by means of CPMAS15N n.m.r. In fresh bituminous coal, pyridine interacts only weakly through physical adsorption and hydrogen-bonded complex formation. On the other hand, in oxidized bituminous coal and fresh subbituminous coal the presence of both pyridinium ions and physically sorbed pyridine was observed. The occurrence of proton transfer to pyridine suggests that strongly acidic functions are generated during coal oxidation.