Date of Award


Document Type


Degree Name

Master of Science (MS)


Chemical Engineering


The solution-hydrogenation of Baukol-Noonan lignite, from Burke County, North Dakota, was undertaken in a microautoclave with various organic solvents. The reactor was charged with pulverized lignite and solvent (mixture) in a 1:4 ratio by weight. The reaction conditions were 735-750°F, 1500 psig. initial hydrogen pressure and two hours of reaction time at temperature and pressure.

The percent solubilization of lignite was calculated from the weight of residue recovered and initial weight of lignite charged. It was found that a hydroaromatic ring which was polarized by a nitrogen atom or coupled with a benzene ring was an effective solvent for lignite. Solvents with any two of the three additions of -OH, -NH2 or heterocylic nitrogen attached on or substituted in the naphthalene ring, were not suitable. Among eight binary mixtures of solvents tested, the solubilization of lignite using mixtures was less than with one or both of the pure solvents used in the mixture.