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The lignite drying kinetics follow a unimolecular rate law which is first order in the waste in the sample. There are two segments in the dehydration kinetics plots, and each follows a unimolecular rate law. The first drying segment includes about 80--85% of the water loss. The second drying segment includes includes most of the remaining water and occurs at about half the rate of the first segment. The mechanism is unchanged over the range 20--80(degrees)C. The activation energy for the initial moisture loss is about 8 Kcal/mole. The water jacketed heating system provides superior temperature control. The rate of drying is sensitive to the gas velocity over the sample. The rate of drying is dependent on the sample size and the sample depth. Rates are generally similar for -20 and -100 mesh samples. The same mechanism is observed for differential scanning calorimetry measurements. X-ray powder diffraction measurements show structural changes during the drying process. Drying improves the oil yield from lignite samples as a result of hydrogenation. 8 refs., 4 figs., 2 tabs.