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Assessing sorbents for mercury control in coal-combustion flue gas
Authors:Sjostrom Sharon  Ebner Tim  Ley Trevor  Slye Richard  Richardson Carl  Machalek Tom  Richardson Mandi  Chang Ramsay
Affiliation:Apogee Scientific, Inc, Englewood, Colorado 80110, USA. ssjostrom@apogee-sci.com
Abstract:Sorbent injection for Hg control is one of the most promising technologies for reducing Hg emissions from power-generation facilities, particularly units that do not require wet scrubbers for SO2 control. Since 1992, EPRI has been assessing the performance of Hg sorbents in pilot-scale systems installed at full-scale facilities. The initial tests were conducted on a 5,000-acfm (142-m3/min) pilot baghouse. Screening potential sorbents at this scale required substantial resources for installation and operation and did not provide an opportunity to characterize sorbents over a wide temperature range. Data collected in the laboratory and in field tests indicate that sorbents are affected by flue gas composition and temperature. Tests carried out in actual flue gas at a number of power plants also have shown that sorbent performance can be site-specific. In addition, data collected at a field site often are different from data collected
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