摘要：The magnetic silver-loaded polytetrafluoroeth-ylene (PTFE) fiber was employed to remove mercury (Hg°) in simulated flue gas. Factors affecting Hg° removal efficiency (including inlet Hg concentration, reaction temperature and partial flue gas components) were studied. Results showed that the Hg° removal efficiency showed nonlinear trend with the increasing inlet Hg concentration. Besides, the Hg° removal efficiency increased from 52.6% to 76.5% when the reaction temperature increased from 25°C to 160°C, but had a negative effect with further reaction temperature increase. When lOOppm and 300ppm of NO were added to the N2 gas stream, the Hg° removal efficiency increased from 70.5% to around 71.8% and 73.2%, however, in the presence of 4% 02, the efficiency to around 74.8%. When 15ppm and 45ppm of HC1 were added to the pure N2 gas stream, the Hg° removal efficiency increased from 70.5% to 80.5% and 81.4%, the efficiency to around 85.6% when the presence of 4% 02. When 200ppm and 500 ppm of S〇2 to the pure N2 gas stream, the Hg° removal efficiency decreased from 70.5% to 62.4% and 49.5%, the efficiency was around 65.8% when added 4% 02. Therefore, NO and HC1 could enhance the mercury removal efficiency, but SO2 hindered Hg° removal. Furthermore, the magnetic silver-loaded PTFE fiber could be regenerated and repeatedly used for about five times.
