Carbon sorption of trace mercury species
Book
·
OSTI ID:43241
- Univ. of North Dakota, Grand Forks, ND (United States). Energy and Environmental Research Center
Coal-fired power utilities may register mercury concentrations of 2--15 {mu}g/Nm{sup 3} in the flue gas stream, but waste incinerator flue gas may contain up to 1,000--2,000 {mu}g/Nm{sup 3}. To remove trace amounts of mercury species, activated carbons are used, especially in the waste incineration industry. However, carbon removal efficiency depends on the nature of the carbons, mercury speciation, and condition in the capture region. Recently, Metzger and Braun, and others, have shown that activated carbon only partially adsorbs elemental mercury from the gas stream. On the other hand, Metzger and Braun indicated that activated carbon adsorbs virtually all mercuric chloride (HgCl{sub 2}) at 200 C, partial breakthrough occurring at about 250 C. Iodized activated carbon, however, adsorbs mercury vapor, forming thermally stable mercuric iodide. Their results suggest that iodized carbon also has enhanced sorption capacity for HgCl{sub 2}. Quantitative adsorption was demonstrated for both mercury species at temperatures up to 180 C. The carbon sorption process is affected by the presence of other components in the flue gas. For example, Hall and others have reported that oxygen influences the interaction process over the temperature range of 100--300 C. The preliminary results reported herein on the capture of mercury species by two carbon sorbents are from a major program at the EERC on air toxic emissions.
- OSTI ID:
- 43241
- Report Number(s):
- CONF-940930--
- Country of Publication:
- United States
- Language:
- English
Similar Records
New mercury control technology for the Ft. Dix waste-to-energy plant
Mercury emissions from German fluidized bed sludge incinerators -- A status report
Removal of mercury from stack gases by activated carbon
Conference
·
Sun Nov 30 23:00:00 EST 1997
·
OSTI ID:548954
Mercury emissions from German fluidized bed sludge incinerators -- A status report
Conference
·
Thu Jul 01 00:00:00 EDT 1999
·
OSTI ID:20006731
Removal of mercury from stack gases by activated carbon
Conference
·
Sun Oct 01 00:00:00 EDT 1995
·
OSTI ID:111482