Characterization, extraction, and reuse of coal-gasification solid wastes. Volume 1. Characterization of coal gasification solid wastes. Final report, May 1983-June 1986

Technical Report · Tue Mar 01 04:00:00 EST 1988

OSTI ID:5330983

McCarthy, G J; Stevenson, R J; Hassett, D J

Coal gasification, such as that underway at Beulah, ND, results in large quantities of by-product ash that must be either utilized commercially or disposed in landfills. Detailed ash characterization is necessary for either option. Chemical composition (by AAS, ICP and XRF), mineralogy (by XRD and SEM) and thermal analysis (by TGA) were determined for nine fixed-bed low-rank coal (lignite) ash samples prepared over a five-year period in three gasifiers representing a range of operating conditions. The ashes are coarsely granular and show considerable grain-to-grain heterogeneity. They have higher concentrations of Na/sub 2/O, CaO, and MgO and lower concentrations of Al/sub 2/O/sub 3/ and SiO/sub 2/ than bituminous coal ash. Their trace-element concentrations are typical of lignite combustion ashes. Unlike the combustion ashes, the gasification ashes are dominantly crystalline with an assemblage of mineral-like silicates (melilite, merwinite, dicalcium silicates, nepheline, carnegieite, sodalite, feldspars), oxides (periclase, ferrite spinel, quartz) and calcite. Glass phases are rich in sodium aluminosilicate.

• Research Organization: North Dakota Univ., Grand Forks (USA). North Dakota Mining and Mineral Resources Research Inst.
• OSTI ID: 5330983
• Report Number(s): PB-88-197140/XAB
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010800 -- Coal
Lignite
& Peat-- Waste Management
ASHES
BROWN COAL
CARBONACEOUS MATERIALS
CERAMICS
CHEMICAL ANALYSIS
COAL
COAL GASIFICATION PLANTS
DOCUMENT TYPES
ELEMENTS
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
FUELS
GASIFICATION
INDUSTRIAL PLANTS
INDUSTRIAL WASTES
LIGNITE
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
METALS
MINERAL WOOL
NONMETALS
POLLUTION CONTROL EQUIPMENT
PROCESSING
PROGRESS REPORT
RECOVERY
RESIDUES
SCRUBBERS
SULFUR
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES