Characteristics of mercury desorption form sorbents at elevated temperatures

摘要

This study investigated the dynamic desorption characteristics of mercury during the thermal treatment of mercury-loaded sor- bents at elevated temperatures under fixed-bed operations. Experiments were carried out in a 25.4 mm ID quartz bed enclosed in an electric furnace. Elemental mercury and mercuric chloride were tested with activated carbon and bauxite. The experimental results indicated that mercury desoption form sorbents was strongly affected by the desorption temperature and the mercury-sorbent pair. Elemental mercury was observed to desorb faster than mercuric chloride and activated carbon appeared to have higher desorption Limits than bauxite at low temperatures.