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Title: Trace metal capture by various sorbents during fluidized bed coal combustion

Abstract

This study investigated the potential of employing suitable sorbents to capture toxic trace metallic substances during fluidized bed coal combustion. Metal capture experiments were carried out in a 25.4 mm (1 inch) quartz fluidized bed combustor enclosed in an electric furnace. The metals involved were cadmium, lead, chromium, arsenic and selenium, and the sorbents tested included bauxite, zeolite and lime. In addition to the experimental investigations, potential metal-sorbent reactions were also identified through chemical equilibrium calculations based on the minimization of system free energy. The observed experimental results indicated that metal capture by sorbents can be as high as 88% depending on the metal species and sorbent involved. Results from thermodynamic equilibrium simulations suggested the formation of metal-sorbent compounds such as Pb{sub 2}SiO{sub 4}(s), CdAl{sub 2}O{sub 4}(s) and CdSiO{sub 3}(s) under the combustion conditions.

Authors:
; ; ;  [1]
  1. Lamar Univ., Beaumont, TX (United States)
Publication Date:
OSTI Identifier:
490356
Report Number(s):
CONF-970310-
TRN: 97:003021-0075
Resource Type:
Conference
Resource Relation:
Conference: 22. international technical conference on coal utilization and fuel systems, Clearwater, FL (United States), 17-20 Mar 1997; Other Information: PBD: [1997]; Related Information: Is Part Of The proceedings of the 22nd international technical conference on coal utilization and fuel systems; Sakkestad, B.A. [ed.]; PB: 1012 p.
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; ARSENIC; SORPTION; CADMIUM; CHROMIUM; COAL; FLUIDIZED-BED COMBUSTION; LEAD; SELENIUM; BAUXITE; SORPTIVE PROPERTIES; ZEOLITES; CALCIUM OXIDES; METALS; AIR POLLUTION CONTROL

Citation Formats

Ho, T C, Ghebremeskel, A, Wang, K S, and Hopper, J R. Trace metal capture by various sorbents during fluidized bed coal combustion. United States: N. p., 1997. Web.
Ho, T C, Ghebremeskel, A, Wang, K S, & Hopper, J R. Trace metal capture by various sorbents during fluidized bed coal combustion. United States.
Ho, T C, Ghebremeskel, A, Wang, K S, and Hopper, J R. 1997. "Trace metal capture by various sorbents during fluidized bed coal combustion". United States.
@article{osti_490356,
title = {Trace metal capture by various sorbents during fluidized bed coal combustion},
author = {Ho, T C and Ghebremeskel, A and Wang, K S and Hopper, J R},
abstractNote = {This study investigated the potential of employing suitable sorbents to capture toxic trace metallic substances during fluidized bed coal combustion. Metal capture experiments were carried out in a 25.4 mm (1 inch) quartz fluidized bed combustor enclosed in an electric furnace. The metals involved were cadmium, lead, chromium, arsenic and selenium, and the sorbents tested included bauxite, zeolite and lime. In addition to the experimental investigations, potential metal-sorbent reactions were also identified through chemical equilibrium calculations based on the minimization of system free energy. The observed experimental results indicated that metal capture by sorbents can be as high as 88% depending on the metal species and sorbent involved. Results from thermodynamic equilibrium simulations suggested the formation of metal-sorbent compounds such as Pb{sub 2}SiO{sub 4}(s), CdAl{sub 2}O{sub 4}(s) and CdSiO{sub 3}(s) under the combustion conditions.},
doi = {},
url = {https://www.osti.gov/biblio/490356}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 01 00:00:00 EDT 1997},
month = {Tue Jul 01 00:00:00 EDT 1997}
}

Conference:
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