Advanced processes for premium low-rank coal/water fuel production
Four coals were identified as good candidates for low-rank coal/water fuel production: Beulah lignite from North Dakota, Jacobs Ranch subbituminous coal from Wyoming, Spring Creek subbituminous coal from Montana, and Usibelli subbituminous coal from Alaska. Pilot-scale fuel preparation capabilities were developed to prepare sizable quantities of low-ash coal/water fuel from low-rank coals for advance combustion applications. This was accomplished using a preparation scheme which included physical and chemical cleaning, hot-water drying, size optimization and, in some cases, the use of additives. Low-rank coal/water fuels were prepared with less than 1.5 wt % ash and energy densities over 8000 Btu/lb, depending on the particle size distribution desired. Bench-and pilot-scale research supported the development of the production scheme. Rheological characterization of the CWF was performed with respect to particle size distribution, additives, and temperature. The effectiveness of process water treatment for the hot-water drying step was investigated. A single-stage activated sludge system was effective in treating process water effluent. 24 refs., 46 figs., 41 tabs.
- Research Organization:
- North Dakota Univ., Grand Forks, ND (USA). Energy and Mineral Research Center
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FC21-86MC10637
- OSTI ID:
- 6913103
- Report Number(s):
- DOE/MC/10637-2827-Tast-4.2; ON: DE90011405
- Country of Publication:
- United States
- Language:
- English
Similar Records
Task 27 -- Alaskan low-rank coal-water fuel demonstration project
Low-rank coal research. Quarterly report, January--March 1990
Related Subjects
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ADDITIVES
ASH CONTENT
BROWN COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CLEANING
COAL
COAL PREPARATION
COLLOIDS
COMBUSTION
COST
DISPERSIONS
DISSOLUTION
DOCUMENT TYPES
ENERGY SOURCES
FILTRATION
FLOTATION
FOSSIL FUELS
FUEL SLURRIES
FUELS
FUNCTIONAL MODELS
HYDROGEN COMPOUNDS
LEACHING
LIGNITE
LIQUID WASTES
MATERIALS
MIXTURES
OILS
OPERATING COST
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PARTICLE SIZE
PROCESS DEVELOPMENT UNITS
PROGRESS REPORT
RHEOLOGY
SEPARATION PROCESSES
SIZE
SLUDGES
SLURRIES
SUBBITUMINOUS COAL
SULFONATES
SURFACTANTS
SUSPENSIONS
THERMOCHEMICAL PROCESSES
ULTRAFILTRATION
WASTE WATER
WASTES
WATER
WATER TREATMENT