Combustion of char-coal waste pellets for high efficiency and low NO{sub x}. Technical report, March 1--May 31, 1995
To maintain market share, new uses must be found for Illinois coals in the largest end use area, namely power generation. To this end, the suitability of Illinois coal for high efficiency power plants like combined cycles must be investigated. This approach involves partial gasification of the coal to produce fuel gas for the topping cycle gas turbines, while the residual char is burnt in the gas turbine exhaust to produce steam for the Rankine bottoming cycle. This project seeks to improve the combustion characteristics of the residual char by pelletizing it with waste coal in order to improve its combustor residence time and carbon conversion efficiency. At the same time, attempts are made to reduce pollutant emissions. During this quarter, the residual char produced by Foster Wheeler Development Corporation in their pyrolyzer has been pelletized with Illinois gob coal in various proportions. Combustion tests have been performed in a laboratory scale circulating fluidized bed combustor. Preliminary results show that the pellets are much easier to burn and exhibit high carbon conversion efficiencies. Further combustion tests are in progress.
- Research Organization:
- Southern Illinois Univ., Carbondale, IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
- DOE Contract Number:
- FC22-92PC92521
- OSTI ID:
- 206503
- Report Number(s):
- DOE/PC/92521--T223; ON: DE96006563
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AIR POLLUTION ABATEMENT
BINDERS
BITUMINOUS COAL
BRIQUETS
CHARS
CHEMICAL REACTION YIELD
COAL GASIFICATION
COAL PREPARATION
FLUIDIZED-BED COMBUSTION
HYDROCHLORIC ACID
LIGNIN
LIMESTONE
MATERIALS TESTING
NITROGEN OXIDES
PELLETIZING
PROGRESS REPORT
SORBENT INJECTION PROCESSES
STARCH
SULFUR DIOXIDE
TAILINGS
WASTE PRODUCT UTILIZATION