TiO2-蒙脱土复合载体在平板式脱硝催化剂中的应用

为提升平板式脱硝催化剂性能，以TiO₂-蒙脱土、TiO₂-酸改性蒙脱土为复合载体进行催化剂的制备。采用XRF、XRD、N₂-吸附脱附、拉曼光谱、H₂-TPR、NH₃-TPD等表征手段对催化剂的物理化学性能进行分析。结果显示:与传统V₂O₅-MoO₃/TiO₂催化剂相比，采用上述复合载体制备的脱硝催化剂具有更高的比表面积和耐磨强度。V₂O₅-MoO₃/TiO₂-蒙脱土催化剂中碱金属元素（Na、K）的存在，降低了催化剂的还原性能和酸性性能，对催化剂的脱硝活性有负面影响。相比蒙脱土，酸改性蒙脱土的比表面积较高，碱金属元素含量降低，所以V₂O₅-MoO₃/TiO₂-酸改性蒙脱土催化剂的脱硝活性较高。此外，该催化剂还具备优良的抗SO₂、H₂O性能。 

Application of TiO2-Montmorillonite Composite Carrier in Plate-type De-NOx Catalyst

In order to improve the catalytic property of the plate-type De-NO_x catalysts, TiO₂-montmorillonite and TiO₂-acid treated montmorillonite were used as the composite carriers for the preparation of the catalyst. XRF, XRD, N₂-adsorption, Raman, H₂-TPR and NH₃-TPD analysis were carried out to investigate the physical and chemical properties of the catalysts. The result shows that the BET surface area and the attrition strength of the catalysts with the using of composite carriers are higher than that of the traditional V₂O₅-MoO₃/TiO₂ catalyst. Alkali metal element (Na, K) contained in the montmorillonite has negative effect on the reducibility and acidity of V₂O₅-MoO₃/TiO₂-montmorillonite catalyst, which is unfavorable for the catalytic performance. The acid treatment improves the BET surface area of the montmorillonite, and decreases the alkali metal element content simultaneously. As a result, the catalytic activity of V₂O₅-MoO₃/TiO₂-acid treated montmorillonite catalyst is relatively high. Addtionally, this catalyst also exhibits well SO₂ and H₂O resistance.