Novel Sorbents for Mercury Emissions Control from coal-fired Power Plants

Sang-Sup Lee ； Joo-Youp Lee ； Tim C. Keener

《Journal of the Chinese Institute of Chemical Engineers》 39卷2期 (2008/03) Pp. 137-142

並列摘要

The authors have successfully developed novel efficient and cost-effective sorbents for mercury removal from coal combustion flue gases. These sorbents were evaluated in a fixed-bed system with a typical PRB subbituminous/lignite simulated flue gas, and in an entrained floss system with air simulating in-flight mercury capture by sorbent injection in the ductwork of coal-fired utility plants. In built systems, one of the novel sorbents showed promising results for Hg^0 removal. In particular, this sorbent demonstrated slightly higher efficiencies in Hg^0 removal than Darco Hg-LH (commercially available brominated activated carbon) at the similar injection rates in the entrained-flow system. The other novel sorbent showed excellent Hg^0 oxidation capability, and may enable coal-fired power plants equipped with wet scrubbers to simultaneously control their mercury and sulfur oxides emissions. In addition, fixed-bed results for this sorbent showed that ca-injection of a vary small amount (~10%) of raw activated carbon could eliminate almost all of the mercury generated by reactions of Hg^0 with the sorbent.

並列關鍵字

Clean coal technologies ； Coal-fired utility plants ； Mercury emissions control ； Fixed-bed test ； Entrained-flow test ； Sorbent injection