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

Abstract

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 laboratorymore » method and equipment was compared with results using standard ASTM procedure. The routine distillation gave slightly lower distillate volumes at a given vapor temperature.« less

Authors:
Publication Date:
Research Org.:
North Dakota Univ., Grand Forks (USA). Engineering Experiment Station
OSTI Identifier:
6485244
Report Number(s):
FE-4189-7
DOE Contract Number:  
EF-77-C-02-4189
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Severson, D. E. Solvent refined lignite process development. Quarterly technical progress report No. 1, July--September 1977. United States: N. p., 1978. Web. doi:10.2172/6485244.
Severson, D. E. Solvent refined lignite process development. Quarterly technical progress report No. 1, July--September 1977. United States. https://doi.org/10.2172/6485244
Severson, D. E. 1978. "Solvent refined lignite process development. Quarterly technical progress report No. 1, July--September 1977". United States. https://doi.org/10.2172/6485244. https://www.osti.gov/servlets/purl/6485244.
@article{osti_6485244,
title = {Solvent refined lignite process development. Quarterly technical progress report No. 1, July--September 1977},
author = {Severson, D. E.},
abstractNote = {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.},
doi = {10.2172/6485244},
url = {https://www.osti.gov/biblio/6485244}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Apr 07 00:00:00 EST 1978},
month = {Fri Apr 07 00:00:00 EST 1978}
}