Ultrafiltration de-ashing process for solvent-refined coal

Conference · Tue Jan 01 04:00:00 EST 1980 · Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States)

OSTI ID:6736468

Bensalem, A

Virtually all of the coal liquefaction processes require the separation of ash particles from the coal derived liquids in order to qualify the product as a furnace fuel. The SRC, Solvent Refined Coal, process produces a liquid having about 5% ash; a reduction of ash to below 0.1% is necessary to obviate the use of electrostatic precipitators in the furnace, thus reducing capital costs in product utilization. A further de-ashing to less than 0.005% would qualify SRC as a gas turbine fuel. Also, since most of the sulfur in SRC (0.55%) is concentrated in the ash; a UF de-ashing process would partially obviate the need for extensive desulfurization of the product. A typical analysis is shown in Table 1. The asphaltenes (benzene soluble, pentane soluble) are believed to be responsible for the high viscosity of the product. A separation of these asphaltenes from the fuel could serve to avert viscosity-related problems in use. These asphaltenes could be further treated by thermal hydrocracking to produce more oil. The objective in this investigation was to study the de-ashing (also de-sulfurization) of SRC using UF membranes including ones of fixed-charge, sulfonic acid nature. Principally such parameters as feed viscosity, temperature, use of solvents, cross-flow velocity, nature of the membrane and its fouling were investigated.

• Research Organization: Columbia Univ., New York, NY
• OSTI ID: 6736468
• Report Number(s): CONF-800814-P2
• Conference Information: Journal Name: Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States) Journal Volume: 25:3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
AROMATICS
ASHES
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL REACTIONS
DEASHING
DESULFURIZATION
ELEMENTS
FILTRATION
FLOW RATE
FUELS
HYDROXY COMPOUNDS
MEMBRANES
NONMETALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHENOLS
RESIDUES
SEPARATION PROCESSES
SOLVENT-REFINED COAL
SOLVENTS
SULFUR
TAR
TEMPERATURE EFFECTS
ULTRAFILTRATION
VERY HIGH PRESSURE
VISCOSITY