Citation:

Linak*, W P., R K. Srivastava, AND J. L. Wendt. SORBENT CAPTURE OF NICKEL, LEAD, AND CADMIUM IN A LABORATORY SWIRL FLAME INCINERATOR. COMBUSTION AND FLAME. Elsevier Science BV, Amsterdam, Netherlands, 100(1-2):241-250, (1995).

Impact/Purpose:

Journal Article

Description:

The paper gives results of an investigation of the in-situ capture of toxic metals by sorbents in a small semi-industrial scale 82 kW research combustor. The metals considered, nickel, lead, and cadmium, were introduced into the system as aqueous nitrate solutions sprayed down the center of a natural gas flame supported on a variable swirl burner. Kaolinite, bauxite, and hydrated lime were injected along the centerline in the postflame, near the peak system temperature. Measurements of both the submicron aerosol size distribution and the size segregated particulate composition in the exhaust allowed the effects of sorbent injection to be ascertained, both with and without the presence of chlorine. Lead and cadmium could be almost completely scavenged by kaolinite. Bauxite was exceedingly effective in capturing cadmium; however, chlorine inhibited metal capture in these instances. Hydrated lime also captured cadmium to form eutectic melt, a process that was slightly enhanced by chlorine. Nickel alone did not significantly vaporize and was not captured by kaolinite; however, in the presence of chlorine, nickel did vaporize and was effectively captured. These results are interpreted and compared to bench scale results in the literature. Two mechanisms, or scenarios, for toxic metal capture are presented.

URLs/Downloads:

Record Details:

Document IDs: