Project lignite. Quarterly technical progress report No. 5, April, May, and June 1975 and annual summary, fiscal year 1975

Technical Report · Wed Dec 03 00:00:00 EST 1975

DOI:https://doi.org/10.2172/7285085· OSTI ID:7285085

Severson, D. E.

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
• DOE Contract Number: E(49-18)-1224
• OSTI ID: 7285085
• Report Number(s): FE-1224-48
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUEFACTION
RESEARCH PROGRAMS
CATALYSTS
HYDROGENATION
LIGNITE
LIQUEFACTION
NORTH DAKOTA
SOLVENT-REFINED COAL
SYNTHESIS GAS
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
NORTH AMERICA
ROCKY MOUNTAIN REGION
USA
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction