(1. 中南大學(xué) 冶金與環(huán)境學(xué)院，長沙 410083；
2. 武漢科技大學(xué) 國家環(huán)境保護礦冶資源利用與污染控制重點實驗室，武漢 430081；
3. 安徽工業(yè)大學(xué) 冶金減排與資源綜合利用教育部重點實驗室，馬鞍山 243002；
4. 永清環(huán)保股份有限公司，長沙 410001)
摘 要: 為了更好地適應(yīng)工業(yè)化脫硝需求，選用廉價的黑色金屬Mn和Fe作為催化劑主要原料，通過V摻雜極大地提升了錳鐵催化劑的低溫脫硝性能和抗硫性能。采用共沉淀法制備了Vx-Mn0.8Fe0.2O2催化劑，運用X射線衍射儀(XRD)、掃描電子顯微鏡(SEM)和X射線光電子能譜分析(XPS)考察了V2O5添加量對Mn0.8Fe0.2O2催化劑的結(jié)構(gòu)、形貌及其抗硫脫硝性能的影響。結(jié)果表明：Vx-Mn0.8Fe0.2O2催化劑主要物相為Mn2O3，樣品顆粒尺寸小且分散均勻。V0.3-Mn0.8Fe0.2O2催化劑具有較多的活性位點及較好的抗硫脫硝性能，在300 ℃時脫硝率可達90.36%，相比于Mn0.8Fe0.2O2催化劑脫硝性能達到90%的溫度約降低100 ℃；同時，在V(CO):V(NO):V(SO2)為3:1:1的反應(yīng)條件下，催化劑的脫硝率仍能保持在80%以上。
關(guān)鍵字: 錳鐵催化劑；V2O5 摻雜；催化脫硝；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
