Production of activated char from Illinois coal for flue gas cleanup
- Illinois State Geological Survey, Champaign, IL (United States)
There is renewed interest in the use of carbon-based materials for low temperature (80-150{degrees}C) removal of sulfur dioxide, nitrogen oxides, mercury and other air toxics from coal combustion and waste incineration flue gas. Several air pollution control systems now In commercial use and several more on the verge of commercialization could benefit from improvements in the adsorptive/catalytic properties of carbon used to remove these contaminants from flue gas. An ongoing carbon research program at the Illinois State Geological Survey has as one of its principal objectives the development of activated char from Illinois coal suitable for use in such processes. This paper summarizes our recent efforts to produce activated char tailored for specific flue gas cleanup applications. A low surface area, low activity char was developed for cleanup of incinerator flue gas. Five hundred pounds of the material was produced from Illinois coal and tested on a slipstream of flue gas from a commercial incinerator. The char removed more than 97% of the dioxins and furans present in the flue gas; mercury levels in the effluent were below detectable limits. We also produced higher activity chars that showed excellent potential for both SO{sub 2} and NO{sub x} removal. These chars were tested under flue gas conditions simulating those produced from the combustion of high sulfur coal. The performance of one char was similar to that of a commercial catalytic activated carbon.
- OSTI ID:
- 370400
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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