PMID- 15828667
OWN - NLM
STAT- MEDLINE
DCOM- 20050505
LR  - 20190911
IS  - 1096-2247 (Print)
IS  - 1096-2247 (Linking)
VI  - 55
IP  - 3
DP  - 2005 Mar
TI  - A pilot study of mercury liberation and capture from coal-fired power plant fly 
      ash.
PG  - 258-64
AB  - The coal-fired electric utility generation industry has been identified as the 
      largest anthropogenic source of mercury (Hg) emissions in the United States. One 
      of the promising techniques for Hg removal from flue gas is activated carbon 
      injection (ACI). The aim of this project was to liberate Hg bound to fly ash and 
      activated carbon after ACI and provide high-quality coal combustion products for 
      use in construction materials. Both bench- and pilot-scale tests were conducted 
      to liberate Hg using a thermal desorption process. The results indicated that up 
      to 90% of the Hg could be liberated from the fly ash or 
      fly-ash-and-activated-carbon mixture using a pilot-scale apparatus (air slide) at 
      538 degrees C with a very short retention time (less than 1 min). Scanning 
      electron microscope (SEM) evaluation indicated no significant change in fly ash 
      carbon particle morphology following the thermal treatment. Fly ash particles 
      collected in the baghouse of the pilot-scale apparatus were smaller in size than 
      those collected at the exit of the air slide. A similar trend was observed in 
      carbon particles separated from the fly ash using froth flotation. The results of 
      this study suggest a means for power plants to reduce the level of Hg in 
      coal-combustion products and potentially recycle activated carbon while 
      maintaining the resale value of fly ash. This technology is in the process of 
      being patented.
FAU - Li, Jin
AU  - Li J
AD  - Department of Civil Engineering and Mechanics, University of Wisconsin, 
      Milwaukee, WI 53201, USA. li@uwm.edu
FAU - Gao, Xiaobing
AU  - Gao X
FAU - Goeckner, Bryna
AU  - Goeckner B
FAU - Kollakowsky, Dave
AU  - Kollakowsky D
FAU - Ramme, Bruce
AU  - Ramme B
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Air Waste Manag Assoc
JT  - Journal of the Air & Waste Management Association (1995)
JID - 9503111
RN  - 0 (Air Pollutants)
RN  - 0 (Coal)
RN  - 0 (Coal Ash)
RN  - 0 (Particulate Matter)
RN  - 7440-44-0 (Carbon)
RN  - FXS1BY2PGL (Mercury)
SB  - IM
MH  - Air Pollutants/*analysis
MH  - *Carbon
MH  - Coal
MH  - Coal Ash
MH  - Environmental Monitoring
MH  - Incineration
MH  - Mercury/*analysis
MH  - Particulate Matter
MH  - *Power Plants
MH  - Temperature
EDAT- 2005/04/15 09:00
MHDA- 2005/05/06 09:00
CRDT- 2005/04/15 09:00
PHST- 2005/04/15 09:00 [pubmed]
PHST- 2005/05/06 09:00 [medline]
PHST- 2005/04/15 09:00 [entrez]
AID - 10.1080/10473289.2005.10464617 [doi]
PST - ppublish
SO  - J Air Waste Manag Assoc. 2005 Mar;55(3):258-64. doi: 
      10.1080/10473289.2005.10464617.