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PREPARATION AND EVALUATION OF MODIFIED LIME AND SILICA-LIME SORBENTS FOR MERCURY VAPOR EMISSIONS CONTROL
Citation:
Ghorishi, S. B., C. F. Singer, AND C B. Sedman*. PREPARATION AND EVALUATION OF MODIFIED LIME AND SILICA-LIME SORBENTS FOR MERCURY VAPOR EMISSIONS CONTROL. Presented at Mega Symposium, Atlanta, GA, 8/16-20/99.
Description:
The paper discusses current efforts to improve the uptake of mercury species by increasing active sites and adding oxidative species to the sorbent. (NOTE: Previous work showed that mercury chloride vapor is readily absorbed by calcium-based sorbents as an acid gas in environments typical of coal-fired boiler flue gas, while elemental mercury vapor is absorbed by calcium-based sorbents only when sulfur oxides are also present). Preparation of modified lime and silica-lime sorbents and their behavior toward mercury species are compared to those of commercially available lime on a fixed-bed bench reactor. The implications of findings toward development of multipollutant control technologies and planned field pilot evaluations of more promising multipollutant control concepts are discussed.