(1. 中南大学 冶金与环境学院，长沙 410083；
2. 武汉科技大学 国家环境保护矿冶资源利用与污染控制重点实验室，武汉 430081；
3. 安徽工业大学 冶金减排与资源综合利用教育部重点实验室，马鞍山 243002；
4. 永清环保股份有限公司，长沙 410001)
摘 要: 为了更好地适应工业化脱硝需求，选用廉价的黑色金属Mn和Fe作为催化剂主要原料，通过V掺杂极大地提升了锰铁催化剂的低温脱硝性能和抗硫性能。采用共沉淀法制备了Vx-Mn0.8Fe0.2O2催化剂，运用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和X射线光电子能谱分析(XPS)考察了V2O5添加量对Mn0.8Fe0.2O2催化剂的结构、形貌及其抗硫脱硝性能的影响。结果表明：Vx-Mn0.8Fe0.2O2催化剂主要物相为Mn2O3，样品颗粒尺寸小且分散均匀。V0.3-Mn0.8Fe0.2O2催化剂具有较多的活性位点及较好的抗硫脱硝性能，在300 ℃时脱硝率可达90.36%，相比于Mn0.8Fe0.2O2催化剂脱硝性能达到90%的温度约降低100 ℃；同时，在V(CO):V(NO):V(SO2)为3:1:1的反应条件下，催化剂的脱硝率仍能保持在80%以上。
关键字: 锰铁催化剂；V2O5 掺杂；催化脱硝；CO-SCR；一氧化氮
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. National Key Laboratory of Environmental Protection Mining and Metallurgy Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan 430081, China;
3. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Anhui University of Technology, Ma’anshan 243002, China;
4. Yongqing Environmental Protection Co., Ltd., Changsha 410001, China）
Abstract:In order to better adapt to the needs of industrial denitration, this paper selected cheap ferrous metals Mn and Fe as the main raw materials of the catalyst, and greatly improved the low temperature denitration performance and sulfur resistance performance of ferromanganese catalyst by doping V. In this paper, Vx-Mn0.8Fe0.2O2 catalyst was prepared by co-precipitation method. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were used to investigate the effects of V2O5 supplemental amount on the structure, morphology and anti-sulfur denitration performance of Mn0.8Fe0.2O2 catalyst. The results show that the main phase of Vx-Mn0.8Fe0.2O2 catalyst is Mn2O3, which has good homogeneity and fine particles. V0.3-Mn0.8Fe0.2O2 catalyst has more performance sites and better anti-sulfur denitration performance. The denitration rate can reach 90.36% at 300 ℃, which is about 100 ℃ lower than the temperature when the denitration performance of Mn0.8Fe0.2O2 catalyst reaches 90%. At the same time, under the reaction condition of V(CO):V(NO):V(SO2) is 3:1:1, the denitration rate of the catalyst can still keep above 80%.
Key words: ferromanganese catalyst; V2O5 doping; catalytic denitration; CO-SCR; NO
