Making IGCC slag valuable

All indications are that integrated gasification combined-cycle (IGCC) technology will play a major role in tomorrow's generation industry. But before it does, some by-products of the process must be dealt with - for example, unburned carbon that can make IGCC slag worthless. Charah Inc.'s...

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Bibliographic Details
Published in:Power 2005-12, Vol.149 (9), p.61-64
Main Author: WICKER, Ken
Format: Magazinearticle
Language:English
Subjects:
01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
Applied sciences
BUILDING MATERIALS
CARBON
Coal
COAL GASIFICATION
Coal-fired power plants
Collaboration
COMBINED-CYCLE POWER PLANTS
Energy
Energy. Thermal use of fuels
Exact sciences and technology
FLORIDA
GAS GENERATORS
Gasification
Installations for energy generation and conversion: thermal and electrical energy
Landfill
Onsite
Pollution control
Power plants
R&D
Research & development
SEPARATION PROCESSES
SLAGS
SLURRIES
Technological change
Thermal power plants
Turbines
USA
WASTE PROCESSING
WASTE PROCESSING PLANTS
WASTE PRODUCT UTILIZATION
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Summary:All indications are that integrated gasification combined-cycle (IGCC) technology will play a major role in tomorrow's generation industry. But before it does, some by-products of the process must be dealt with - for example, unburned carbon that can make IGCC slag worthless. Charah Inc.'s processing system, used at Tampa Electric's Polk Station for years, segregates the slag's constituents by size, producing fuel and building material. When Tampa Electric Co. was awarded $140 million by the US DOE as part of the agency's Clean Coal Technology program more than a decade ago, the utility envisioned building an IGCC plant that would provide its customers with 250 MW of electricity generated cleanly from gasified coal. Construction of the Polk Power Station 40 miles southeast of Tampa began soon afterward. For both Tampa Electric and the DOE, the goal was to make Polk one of the first large-scale demonstrations of IGCC technology in the US, integrating a clean coal-gasification process with a highly efficient combined-cycle generating unit.
ISSN:0032-5929
1936-7791