Abstract
In-situ observation of 1H-NMR and ESR spectra under reaction conditions can be extremely useful in gaining an understanding of the mechanism of carbonization and coal liquefaction reactions.
The characterization of coals and pitches by in-situ measurements at reaction temperatures and pressures is defined as dynamic characterization. This contrasts with static characterization in which measurements are taken at room temperature.
In this review, recent studies of dynamic measurements of coals and pitches by means of magnetic resonance techniques (both NMR and ESR) under high temperature and/or high pressure are described.
These studies are also useful in clarifying catalytic reactions.
