Solvent refined lignite process development. Quarterly technical progress report No. 1, July--September 1977

Technical Report · Fri Apr 07 00:00:00 EST 1978

DOI:https://doi.org/10.2172/6485244· OSTI ID:6485244

Severson, D. E.

Approximately 900 hours of liquefaction operation were accumulated with the PDU most of which was in two extended runs scheduled for 28 days each. Relatively high conversions were maintained with potential solvent recoveries of over 100% of solvent charged. Actual solvent recoveries, however, were about 90%. Product distribution changed with time of operation with relatively more SRL and less liquids produced while total conversion remained high. Buildup of solids in the reactor resulted in deposits on reactor walls and reduction in residence time giving a higher melting point product. Process upsets and higher melting point SRL caused plugs in piping and process vessels as well as pumping difficulties. Product gas cleanup and recycle were accomplished without difficulty and with no significant difference noted in liquefaction characteristics. In a short run (83 hours), Gascoyne lignite was found to have the greatest response to liquefaction of the lignites tested so far. Conversions were high and yields of SRL were high at the expense of light oil production. Operation of the solids-liquid separation unit gave significant separation of SRL from the mineral matter and unreacted lignite although the separation was variable and less effective than desired. Distillation of solvent by the routine laboratory method and equipment was compared with results using standard ASTM procedure. The routine distillation gave slightly lower distillate volumes at a given vapor temperature.

• Research Organization: North Dakota Univ., Grand Forks (USA). Engineering Experiment Station
• DOE Contract Number: EF-77-C-02-4189
• OSTI ID: 6485244
• Report Number(s): FE-4189-7
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
LIGNITE
CHEMICAL COMPOSITION
ORGANIC SOLVENTS
DISTILLATION
RECYCLING
SRC PROCESS
MATERIAL BALANCE
YIELDS
COAL LIQUEFACTION
COAL LIQUIDS
DEASHING
EXPERIMENTAL DATA
FLOWSHEETS
MINERALS
OPERATION
PROCESS DEVELOPMENT UNITS
PURIFICATION
REMOVAL
SOLVENT-REFINED COAL
TABLES
BROWN COAL
CARBONACEOUS MATERIALS
COAL
DATA
DATA FORMS
DIAGRAMS
ENERGY SOURCES
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
INFORMATION
LIQUEFACTION
NUMERICAL DATA
SEPARATION PROCESSES
SOLVENTS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction