Mn/Cu-BTC催化剂同时脱硫脱硝实验研究

通过水热合成法制得金属有机骨架材料Cu-BTC，采用浸渍法将金属氧化物（Fe、Mn、Ce、Co、Mo）负载在Cu-BTC上得到复合催化剂（X/Cu-BTC）并用于同时脱除模拟烟气中的SO₂和NO。采用N₂物理吸附（BET）、X射线衍射分析（XRD）、热重分析（TG）以及扫描电镜（SEM）等方法对催化剂进行表征。表征结果显示MnO_x的负载使得催化剂的比表面积、孔体积下降，负载前后催化剂的结构保持不变。同时考察了不同金属氧化物负载Cu-BTC同时脱硫脱硝的效果：Mn/Cu-BTC的脱硝最佳，其次为Ce/Cu-BTC。最后对MnO_x与CeO_x的负载量进行了考察，10% Mn/Cu-BTC与10% Ce/Cu-BTC为最佳负载量。在250℃，空速为10000h^-1时，10% Mn/Cu-BTC的脱硫和脱硝效率分别为100%和88%，10% Ce/Cu-BTC的脱硫和脱硝效率分别为100%和75%，表明Mn/Cu-BTC催化剂对于SO₂和NO具有良好的同时脱除效果。

Experimental study on simultaneous removal of SO2 and NO by Mn/Cu-BTC catalyst

The metal organic framework Cu-BTC was prepared by hydrothermal synthesis, and then metal oxides (Fe, Mn, Ce, Co, Mo) were supported on Cu-BTC by impregnation method to obtain composite catalysts (X/Cu-BTC) which were then used for simultaneously remove SO₂ and NO from the simulated flue gas. The physical and chemical properties of the catalysts were characterized by N₂ physical adsorption (BET), X-ray diffraction(XRD), thermal gravimetric analyzer(TG), and scanning electron microscope(SEM). The results showed that the loading of MnO_x decreased the specific surface area and pore volume, but did not change the structure of the catalyst. At the same time, the performance of simultaneous desulfurization and denitrification of Cu-BTC supported by different metal oxides was investigated and Mn/Cu-BTC had the best denitrification efficiency, followed by Ce/Cu-BTC. Finally, the loading of MnO_x and CeO_x was investigated. 10%Mn/Cu-BTC and 10%Ce/Cu-BTC were found to be the optimal loadings. The desulfurization and denitration efficiencies of 10%Mn/Cu-BTC were 100% and 88%, respectively, while those of 10%Ce/Cu-BTC were 100% and 75%, respectively. It is indicated that the Mn/Cu-BTC catalyst had a better simultaneous removal performance on SO₂ and NO.