Solvent refined lignite process development. Quarterly technical progress report No. 1, July--September 1977
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
- OSTI ID:
- 6485244
- Report Number(s):
- FE-4189-7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Project Lignite. Quarterly technical progress report No. 9, April, May, and June 1976 and annual summary, fiscal year 1976
Project lignite. Quarterly technical progress report No. 13, April, May and June 1977
Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
COAL
COAL LIQUEFACTION
COAL LIQUIDS
DATA
DATA FORMS
DEASHING
DIAGRAMS
DISTILLATION
ENERGY SOURCES
EXPERIMENTAL DATA
FLOWSHEETS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
INFORMATION
LIGNITE
LIQUEFACTION
MATERIAL BALANCE
MINERALS
NUMERICAL DATA
OPERATION
ORGANIC SOLVENTS
PROCESS DEVELOPMENT UNITS
PURIFICATION
RECYCLING
REMOVAL
SEPARATION PROCESSES
SOLVENT-REFINED COAL
SOLVENTS
SRC PROCESS
TABLES
THERMOCHEMICAL PROCESSES
YIELDS