Carbon-Based Sorbents For The Removal of Mercury From Flue Gas

1999 Conference on Unburned Carbon in Fly Ash

Evan J. Granite ; Henry W. Pennline ; Richard A. Hargis

Others  :  http://www.netl.doe.gov/publications/proceedings/99/99flyash/granite.pdf
PID  :  47756

来源: CEUR

【 摘 要 】

A laboratory-scale packed-bed reactor system is used to screen carbon sorbents for their capability to remove elemental mercury from various carrier gases. When the carrier gas is argon, an on-line atomicfluorescence spectrophotometer (AFS), used in a continuous mode, monitors the elemental mercuryconcentration in the inlet and outlet streams of the packed-bed reactor. The mercury concentration in thereactor inlet gas and the reactor temperature are held constant during a test. For more complex carriergases, sorbent capacity is determined off-line by using a cold vapor atomic absorption spectrophotometer(CVAAS) or an inductively coupled argon plasma atomic emission spectrophotometer (ICP-AES). Thecapacities and breakthrough times of several commercially available activated carbons, as well as novelcarbon sorbents derived from flyash, were determined as a function of various parameters. The mechanisms of mercury removal by the sorbents are suggested by combining the results of the packed-bedtesting with various analytical results.