制备高比表面LaFeO3钙钛矿用于C3H6选择性催化还原NO
3H6-SCR of NO with high surface areas enhanced LaFeO3 perovskites prepared by reactive grinding
应用柠檬酸络合自燃烧法合成LaFeO3，应用高能球磨法以期提高钙钛矿的比表面积，进而改进催化活性。本实验选用氯化铵（NH4Cl）、氯化钠（NaCl）、氧化锌（ZnO）三种助剂对LaFeO3进行球磨，且对样品进行XRD、BET、H2-TPR、NO+O2-TPD、C3H6-TPD表征及活性测试。结果表明，高能球磨能在保持原有晶形结构的基础上大幅提高钙钛矿型复合氧化物的比表面积，而采用不同球磨助剂对催化活性产生不同影响，以NH4Cl为助剂使催化剂活性提高最为显著。
LaFeO3 was synthesized by a citrate complexing method, then the specific surface area of the sample was enhanced by high-energy-ball milling, in order to improve its catalytic activity for C3H6-SCR of NO. Various fine powders such as ZnO, NaCl and NH4Cl were used as grinding additives in the high-energy-ball milling process. Afterwards the specific surface area enhanced LaFeO3 samples were characterized by XRD, BET, H2-TPR, NO+O2-TPD, C3H6-TPD and activity test, showing that the high-energy-ball milling can largely increase the specific surface area of perovskites. Different grinding additives distinctly affected the activity of C3H6-SCR of NO, and NH4Cl was found to be the most effective grinding additive for increasing the catalyst activity.
张润铎、薛荣荣、杨威
金属元素无机化合物化学工业精细化学工业
钙钛矿高能球磨不同助剂催化还原NO
perovskiteHigh energy ball millingdifferent grinding additivescatalytic reduction of NO
张润铎,薛荣荣,杨威.制备高比表面LaFeO3钙钛矿用于C3H6选择性催化还原NO[EB/OL].(2012-05-31)[2025-08-10].http://www.paper.edu.cn/releasepaper/content/201205-505.点此复制
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