Project lignite. Quarterly technical progress report No. 5, April, May, and June 1975 and annual summary, fiscal year 1975
The continuous lignite liquefaction process development unit was operated in a shake-down mode without use of the solid-liquid separation section. The purposes of these preliminary tests were to train operators and to determine operability of equipment. Seven runs were initiated using lignite, solvent and synthesis gas. None of these was completed because of difficulties with equipment and operational problems. Modification of equipment and improvements in instrumentation and control units are continuing as necessary to improve operability of the PDU. Tests continued using batch-autoclave experiments to study process conditions for liquefaction of lignite. Using a carbon black feedstock as starting solvent, five passes of recycled solvent through successive runs indicated no significant changes in solvent quality. Approximately 50 experiments were completed to evaluate process parameters for the conversion of solvent refined lignite (SRL) to light liquid fuels by catalytic hydrogenation in a one-liter autoclave. Catalysts are required for reasonable conversions of SRL. Highest conversions of SRL to gases and distillable products were obtained with a solvent to SRL ratio of 1:1. Ratios higher or lower gave reduced conversions. With reduced solvent (tetralin) concentration, concentration of aromatics in hydrogenation products increased linearly. A relatively high conversion of SRL was obtained by catalytic hydrogenation without solvent. Larger scalebatch tests gave similar overall conversions although the yield of gaseous products increased while gasoline yield decreased. Hydrogenation of SRC (from bituminous coal) under similar test conditions gave conversions essentially the same as with SRL. (LTN)
- Research Organization:
- North Dakota Univ., Grand Forks (USA). Engineering Experiment Station
- OSTI ID:
- 7285085
- Report Number(s):
- FE-1224-48
- Country of Publication:
- United States
- Language:
- English
Similar Records
Project lignite quarterly technical progress report No. 4, January, February, and March 1975. [Hydrogenation of solvent-refined coal]
Project lignite. Final technical report, March 28, 1972-June 15, 1977
Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
BROWN COAL
CARBONACEOUS MATERIALS
CATALYSTS
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
HYDROGENATION
LIGNITE
LIQUEFACTION
NORTH AMERICA
NORTH DAKOTA
RESEARCH PROGRAMS
ROCKY MOUNTAIN REGION
SOLVENT-REFINED COAL
SYNTHESIS GAS
USA