John R. Rindt

Date of Award


Document Type


Degree Name

Master of Science (MS)


Chemical Engineering


Continuous catalytic depolymerization of solvent refined lignite (SRL) was investigated by reacting it catalytically with hydrogen in a fixed bed trickle reactor, using tetralin as the solvent. At a reaction temperature of 450° C , a hydrogen atmos phere at 1,000 psi, and a liquid hourly space velocity of 1.0 to 1.5 hr“^, 58 runs were made using eighteen different catalysts. Yields of light oil ranged from 0.010 to 0.211 grams of light oil produced per gram of SRL fed. Using a gas chromatograph-mass spectrophotometer, light oils were shown to contain toluene and ethyl benzene, in substantial quantities. Conversion of SRL, which ranged from 0.100 to 0.515 grams SRL converted per gram SRL fed, appeared to be related to the basic content of the catalyst surface.