Correlation of recycle solvent quality to coal liquefaction
''Solvent quality'' is a contrived solvent property used in coal liquefaction. It is assumed to be an important guide for expressing how well a recycle solvent will convert coal to products soluble in tetrahydrofuran (THF) or pyridine. Over the past 40-50 years, much has been written about the solvents used to prepare coal slurries, yet few solvent quality parameters have been quantified and related to process conditions or feedstocks. For this report, solvent quality was measured by kinetic microautoclave test as used at the Wilsonville Advanced Coal Liquefaction Facility. The microautoclave method, originally developed by the Conoco Coal Development Company, has been used to quantify solvent quality at Wilsonville since 1978. This method defines solvent quality as the weight percent tetrahydrofuran solubles generated, based on weight percent moisture- and ash-free (MAF) coal. Traditionally, a solvent quality test result in the lower range (approx. =65) warned of potential preheater coking problems. More recently, solvent quality has been used to monitor the effects of adding light solvent refined coal (LSRC) and distillates to the solvent stream to enhance coal liquefaction and maintain solvent balance. This study attempts to identify important independent and dependent variables associated with the solvent refining of coal (SRC) by relating plant operation to coal feedstock and product state and by correlating the impact to changes in the results from the microautoclave solvent quality test.
- Research Organization:
- Int. Coal Refining Co., Allentown, PA
- OSTI ID:
- 6877881
- Report Number(s):
- CONF-830814-
- Journal Information:
- Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States), Vol. 28:5; Conference: 186. national meeting of the American Chemical Society, Washington, DC, USA, 28 Aug 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL LIQUEFACTION
ORGANIC SOLVENTS
PERFORMANCE TESTING
SOLVENT PROPERTIES
AUTOCLAVES
CHEMICAL FEEDSTOCKS
COAL
COAL LIQUIDS
COKING
CORRELATIONS
SOLUBILITY
SRC PROCESS
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
LIQUEFACTION
LIQUIDS
MATERIALS
SOLVENTS
TESTING
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction