采用溶胶凝胶法分别以SiO₂和Al₂O₃为载体制备Fe₂O₃质量分数为50%的负载型铁基催化剂，并对其进行表征，同时考察了温度、H₂O₂浓度对催化剂催化脱硝性能的影响。结果表明，制备的催化剂中的活性组分Fe₂O₃结晶度低，且粒径小，在载体中分散均匀；Fe₂O₃/SiO₂催化剂的比表面积是Fe₂O₃/Al₂O₃催化剂的5倍多；载体Al₂O₃有利于促进Fe（Ⅲ）的还原；2种催化剂的最佳反应温度为180~260℃，由于Fe₂O₃/Al₂O₃催化剂具有比Fe₂O₃/SiO₂催化剂更高的零电位点（PZC），在此温度区间内，Fe₂O₃/Al₂O₃催化剂的脱硝效率平均比Fe₂O₃/SiO₂催化剂高约20%。

The Fe-based catalysts supported on SiO₂ and Al₂O₃ respectively are prepared by using sol-gel method,in which Fe₂O₃ content is 50 wt%.Their related characterizations are also carried out.At the same time,the effects of temperature and H₂O₂ concentration on the catalytic performance of catalysts are also observed.The results show that the active ingredient (Fe₂O₃) in the prepared catalysts has low crystallinity and small particle size,and is dispersed uniformly on the surface of carrier.The specific surface area of Fe₂O₃/SiO₂ catalyst is 5 times that of Fe₂O₃/Al₂O₃ catalyst.The carrier Al₂O₃ facilitates reduction of Fe(Ⅲ).The optimum reaction temperature for two catalysts is between 180℃ and 260℃.The Fe₂O₃/Al₂O₃ catalyst has higher PZC value than Fe₂O₃/SiO₂ catalyst,which is favorable to the adsorption of H₂O₂,so the denitrification efficiency by Fe₂O₃/Al₂O₃ catalyst is about 20% higher than by Fe₂O₃/SiO₂ catalyst in the temperature range.

茹晋波(1993-),男,硕士研究生,研究方向为烟气脱硫脱硝,rujinbo187@163.com