Abstract
In order to control emissions of sodium compounds during coal combustion, the sorbent injection technology is tested under the coal combustion condition. Kaolin is selected as the sorbent to absorb vapors of sodium compounds evolved from the coals. In the combustion experiments, the kaolin is physically mixed with coal. Two types of coal, which have the similar coal properties, are burned. Combustion tests are conducted, using an electrically heated drop tube furnace, to study effect of kaolin addition on the capture characteristics of sodium compounds. As a result, the kaolin can effectively capture the vapor of sodium compounds even under the actual coal combustion condition. The capture efficiency depends on the coal type. The sodium compounds for the coals, which produce many fine particles with size of less than 1μm, tend to be effectively captured by the kaolin.
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