Adsorption of Mercury onto the Activated Carbons prepared from Various Raw Materials

摘要

Injection of activated carbon upstream of particulate matter control devices is one of the most promising methods to control mercury emissions from the combustion of solid fuels such as coal and waste. Commercial activated carbons demonstrated high mercury control efficiency such as more than 90%.The mercury control efficiency was closely related to the composition of the flue gas. This study was designed to understand mercury adsorption characteristics of activated carbons prepared from various raw materials. Pinewood, coal and dried sewage sludge were used as raw materials of activated carbons. Different manufacturing conditions were applied to obtain the activated carbon samples with various physical properties using a lab-scale rotary kiln reactor. The activated carbon samples were tested for their elemental mercury adsorption performance using a lab-scale fixed-bed reactor system. Simulated flue gas was injected for the tests.