Ultrafiltration deashing process for Solvent-Refined Coal (SRC)

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

OSTI ID:6152252

Bensalem, A

SRC liquid with 1.087 sp gr (90C) and viscosity of 19.8 cp (105C), i.e., a liquefaction product of Indiana V coal consisting of 65% by wt oils (pentane solubles), 27.9% asphaltenes, and 5.7% organic benzene insolubles with 4.5% by wt inorganic ash and 0.55% sulfur content was filtered through a laboratory ultrafiltration (UF) cell under 1-1.55 MPa nitrogen. The UF membranes of a fixed-charge, sulfonic acid type, with approx. 1.5 nm avg pore radius were cast from a solution of polyacrylamide on a spun-bonded polyester support. The steady-state SRC flux through membrane increased by a factor of approx. 2.5 as the liquid viscosity was reduced from 42 to 20.8 by increasing temperature from 85 to 100C. Higher pressures tended to increase the resistance to flow because of the formation of a polarized boundary layer. Both the SRC flux and ash rejection increased and then leveled off as the axial velocity was increased from 3.05 to 3.66 m/sec. Dilution of SRC liquid with 10 or 25% by wt toluene increased the flux by a factor of 3.5 and 6.5, respectively, and improved ash rejection from 99.9 to 99.99-100%. SRC dilution with a coal-derived creosote oil (the 24 CB grade), i.e., a more viscous solvent, was much less effective.

• Research Organization: Columbia University, New York
• OSTI ID: 6152252
• Report Number(s): CONF-800814-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (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
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ALKYLATED AROMATICS
AROMATICS
ASHES
CHEMICAL COMPOSITION
COAL LIQUIDS
CREOSOTE
DATA
DEASHING
DENSITY
DILUTION
ELEMENTS
ESTERS
EXPERIMENTAL DATA
FILTRATION
FLOW RATE
FLUID FLOW
FLUIDS
FUELS
HYDROCARBONS
INFORMATION
LIQUIDS
MEDIUM TEMPERATURE
MEMBRANES
NITROGEN
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYAMIDES
POLYESTERS
POLYMERS
PRESSURE DEPENDENCE
RESIDUES
SEPARATION PROCESSES
SOLVENT-REFINED COAL
SRC PROCESS
STEADY FLOW
SULFUR CONTENT
TEMPERATURE EFFECTS
TOLUENE
ULTRAFILTRATION
VELOCITY
VISCOSITY