溶剂对Fe-MnO_(x)催化剂的超低温NH_(3)-SCR影响研究

Investigation of Solvents′Influences on Fe-MnO_(x)Catalyst for Utra-low Temperature NH3-SCR

针对制备过程中溶剂环境的差异对Fe-MnO_(x)催化剂的影响问题,采用一步共沉淀法制备Fe-MnO_(x)催化剂,探究了合成该催化剂过程中不同的溶剂环境对催化剂活性的影响,发现以甘油作为溶剂环境制备的催化剂有最佳的低温活性和抗硫能力。通过一系列的表征分析后发现,在甘油环境下制备的催化剂具有规则的颗粒形貌和颗粒尺寸、最大的比表面积、丰富且均匀分布的孔道结构、最高的Mn^(4+)、Fe^(3+)和Oα的含量,因而在50℃,GHSV=30000/h的条件下,表现出80%以上的NO_(x)脱除率和更好的抗硫能力。

Aiming at the influence of different solvent environments on Fe-MnO_(x)catalysts during the preparation process,Fe-MnO_(x)catalysts were prepared by a one-step co-precipitation method.The influence of different solvent environments on catalyst activity during the synthesis of the catalyst was investigated.It was found that the catalyst prepared by glycerol as a solvent environment had the best low-temperature activity and sulfur resistance.Through a series of characterization analyses,it was found that the catalyst prepared in a glycerol environment has regular particle morphology and particle size,the largest specific surface area,abundant and evenly distributed pore structure,and the highest contents of Mn^(4+),Fe^(3+)and Oα.Therefore,under the condition of 50℃and GHSV=30000/h,the catalyst can be used to improve the quality of the catalyst.It shows more than 80%NO_(x)removal rate and better sulfur resistance.