Trace metal capture by various sorbents during fluidized bed coal combustion
Experiments were conducted in a 1-in. quartz fluidized bed combustor enclosed in an electric furnace. Coal samples were burned in the bed with a sorbent under specific combustion conditions and the amount of metal capture by the sorbent determined. Three different cao samples from the Illinois Basin Coal Sample Bank were tested. Metals involved were Cd, Pb, and Cr; the sorbents included bauxite, zeolite, and lime. Potential metal-sorbent reactions were identified. Results indicated that metal capture by sorbent can be as high as 96%, depending on the metal species and sorbent. All 3 sorbents were capable of capturing Pb, zeolite and lime were able to capture Cr, and bauxite was the only sorbent capable of capturing Cd. Thermodynamic equilibrium calculations suggested the formation of metal-sorbent compounds such as Pb{sub 2}SiO{sub 4}, CdAl{sub 2}O{sub 4}, and CdSiO{sub 3} solids under the combustion conditions.
- Research Organization:
- Lamar Univ., Beaumont, TX (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-94PC94221
- OSTI ID:
- 240355
- Report Number(s):
- CONF-960772-6; ON: DE96009436
- Resource Relation:
- Conference: 26. international symposium on combustion, Naples (Italy), 28 Jul - 2 Aug 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Control of trace metal emissions during coal combustion. Technical progress report, April 1, 1996--June 30, 1996
Capture of toxic metals by vaious sorbents during fluidized bed coal combustion