CuO/ZSM-5系列催化剂的脱硫脱硝性能研究

采用浸渍法制备了不同质量分数的催化剂x％ CuO/ZSM-5 (x =2、4、6、8、10、12、50),并考察了其在CH4为还原剂条件下的脱硫脱硝性能.同时,采用X射线衍射(XRD)、H2-程序升温还原(H2-TPR)、NH3-程序升温脱附(NH3-TPD)、比表面积(BET)、扫描电子显微镜与能谱分析(SEM-EDS)等测试手段对催化剂进行表征.实验结果表明:10％ CuO/ZSM-5催化剂的活性组分具有较好的晶型结构,且高度分散在ZSM-5骨架中.在CH4+NO+ SO2反应中,10％ CuO/ZSM-5催化剂具有最好的脱硫脱硝活性,最高脱硫率和脱硝率分别为97.4％和94.6％.

Desulfurization and denitrifition properties of the CuO/ZSM-5 catalysts

2%, 4%, 6%, 8%, 10%, 12%, and 50% CuO/ZSM-5 catalysts were prepared by impregnation and the desulfurization and denitrification properties were investigated with CH₄ as the reducer. The catalysts were characterized by XRD, H₂-TPR, NH₃-TPD, BET and SEM-EDS. The experimental results showed that the active components of 10% CuO/ZSM-5 catalysts were highly dispersed in the skeleton of ZSM-5 with better crystal type structure. In the reaction of CH₄+NO+SO₂, 10% CuO/ZSM-5 catalysts had the best desulfurization and denitrafication activities. The highest desulfurization and denitrification rates were 97.4% and 94.6%, respectively.