Development of new sorbents to remove mercury and selenium from flue gas. Final report, September 1, 1993--August 31, 1994

Technical Report · Wed Feb 01 04:00:00 EST 1995

DOI:https://doi.org/10.2172/57877· OSTI ID:57877

Shiao, S Y ^[1]

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1. Babcock and Wilcox Co., Alliance, OH (United States)

Mercury (Hg) and selenium (Se) are two of the volatile trace metals in coal, which are often not captured by conventional gas clean up devices of coal-fired boilers. An alternative is to use sorbents to capture the volatile components of trace metals after coal combustion. In this project sorbent screening tests were performed in which ten sorbents were selected to remove metallic mercury in N{sub 2}. These sorbents included activated carbon, char prepared from Ohio No. 5 coal, molecular sieves, silica gel, aluminum oxide, hydrated lime, Wyoming bentonite, kaolin, and Amberite IR-120 (an ion-exchanger). The sorbents were selected based on published information and B&W`s experience on mercury removal. The promising sorbent was then selected and modified for detailed studies of removal of mercury and selenium compounds. The sorbents were tested in a bench-scale adsorption facility. A known amount of each sorbent was loaded in the column as a packed bed. A carrier gas was bubbled through the mercury and selenium compounds. The vaporized species were carried by the gas and went through the sorbent beds. The amount of mercury and selenium compounds captured by the sorbents was determined by atomic absorption. Results are discussed.

• Research Organization: Ohio Coal Development Office, Columbus, OH (United States)
• Sponsoring Organization: Ohio State Government, Columbus, OH (United States)
• OSTI ID: 57877
• Report Number(s): OCDO--95010711; ON: TI95010711
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
ACTIVATED CARBON
ADSORBENTS
ALUMINIUM OXIDES
CALCIUM HYDROXIDES
CHARS
CLEANING
COMPARATIVE EVALUATIONS
DEMETALLIZATION
EXPERIMENTAL DATA
FLUE GAS
KAOLIN
MERCURY
MOLECULAR SIEVES
PROGRESS REPORT
REMOVAL
SELENIUM
SILICA GEL
SORBENT INJECTION PROCESSES