烟气抗硫脱汞材料的研究进展

Research progress on flue gas mercury removal materials with SO2 resistance

综述了近年来烟气抗硫脱汞材料的研究进展,提出抗硫脱汞材料设计的4种方法,分别为活性位保护法、活性位增加法、氧活性位规避法和贵金属催化法。活性位的保护可以利用材料的亲硫性或抗硫性来实现,活性位的增加可以通过表面氧缺陷构造或者气氛调控来实现,氧活性位的规避可以通过抗硫活性位的设计来实现,而贵金属催化剂的抗硫脱汞机理则复杂多变。这4种方法的提出将为抗硫脱汞材料的进一步研发提供参考。

The recent research progress on mercury removal materials with SO2 resistance was reviewed.Four methods for the design of mercury removal materials with SO2 resistance were proposed,which were active site protection method,active site increase method,oxygen-containing active site evasion method and noble metal catalysts method.The protection of active sites can be achieved by doping the materials with sulfur affinity or sulfur resistance.The increase of active sites can be achieved by the enrichment of surface oxygen defects or the adjustment of reaction atmosphere.The evasion of oxygen-containing active sites can be achieved through the design of SO2- resistant active sites.The mechanisms of mercury removal with SO2 resistance of noble metal catalysts are complicated which can vary with certain materials.The proposed four methods will provide the theoretical reference for further development of mercury removal materials with SO2 resistance.