Production of activated char from Illinois coal for flue gas cleanup
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Abstract
Activated chars were produced from Illinois coal and tested in several flue gas cleanup applications. High-activity chars that showed excellent potential for both SO2 and NOx removal were prepared from an Illinois No. 2 bituminous coal. The SO2 (120 °C) and NOx (25 °C) removal performance of one char compared favorably with that of a commercial activated carbon (Calgon Centaur). The NOx removal performance of the same char at 120 °C exceeded that of the Centaur carbon by more than 1 order of magnitude. Novel char preparation methods were developed including oxidation/thermal desorption and hydrogen treatments, which increased and preserved, respectively, the active sites for SO2 and NOx adsorption. The results of combined SO2/NOx removal tests, however, suggest that SO2 and NOx compete for similar adsorption sites and SO2 seems to be more strongly adsorbed than NO. A low-activity, low-cost char was also developed for cleanup of incinerator flue gas. A three-step method involving coal preoxidation, pyrolysis, and CO2 activation was used to produce the char from Illinois coal. Five hundred pounds of the char was tested on a slipstream of flue gas from a commercial incinerator in Germany. The char was effective in removing >97% of the dioxins and furans present in the flue gas; mercury levels were below detectable limits.
Suggested Citation
Lizzio, A., DeBarr, J., Kruse, C., 1997, Production of activated char from Illinois coal for flue gas cleanup: Energy and Fuels, v. 11, no. 2, p. 250-259, https://doi.org/10.1021/ef960196h.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Production of activated char from Illinois coal for flue gas cleanup |
| Series title | Energy and Fuels |
| DOI | 10.1021/ef960196h |
| Volume | 11 |
| Issue | 2 |
| Publication Date | March 19, 1997 |
| Year Published | 1997 |
| Language | English |
| Publisher | Oxford Academic |
| Description | 10 p. |
| First page | 250 |
| Last page | 259 |