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METAL CAPTURE BY SORBENTS IN COMBUSTION PROCESSES
Citation:
Scotto, M. V., M. Uberoi, T. W. Peterson, F. Shadman, AND J. L. Wendt. METAL CAPTURE BY SORBENTS IN COMBUSTION PROCESSES. FUEL PROCESSING TECHNOLOGY. Elsevier Science BV, Amsterdam, Netherlands, 39(1-3):357-372, (1994).
Impact/Purpose:
Journal Article
Description:
The article gives results of an investigation of the use of sorbents to control trace metal emissions from combustion processes and an exploration of the underlying mechanisms. mphasis was on mechanisms in which the metal vapor was reactively scavenged by simple commercial sorbents to form water-unleachable products which are easy to collect and isolate from the environment. esults. are presented from two scales of experimentation, involving a bench- scale thermogravimetric reactor and a 17 kill down-fired laboratory combustor. ench-scale tests showed that lead and cadmium, vaporized from the chloride salt, could be reactively captured at temperatures above the dew point. oth kaolinite and bauxite were effective sorbents for lead, while bauxite but not kaolinite was effective for cadmium. he primary reaction products, identified by x-ray diffraction analyses, were lead and cadmium aluminosilicates. aboratory combustor tests, completed in the absence of coal char or coal ash particles, showed that lead could be effectively reactively scavenged in-situ in a combustor, downstream of the primary flame. ere, the high temperatures of the combustion process were being exploited to promote the reactions between the metal vapor and kaolinite sorbent that were identified in the bench-scale tests.
URLs/Downloads:
Metal Capture by Sorbents in Combustion Processes
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