【摘要】 本研究制备了一系列不同Nd含量的V2O5-MoO 3-Nd2O3/TiO 2平板式脱硝催化剂。采用XRD、N2-吸附脱附、XPS、H2-TPR、拉曼光谱、NH3-TPD和红外光谱等表征手段对催化剂进行分析。结果表明:适量的Nd2O3(0.25%、0.5%,质量分数)可以增强V2O5-MoO 3/TiO 2催化剂的还原性能,增加了催化剂的Oα/(Oα+Oβ)比率,从而提升了催化剂的脱硝活性。然而,过量Nd2O3 (0.75%、1%)的添加,会导致催化剂酸性性能的显著降低,造成催化剂脱硝性能的下降。此外,过量Nd的添加还会对催化剂的耐磨性能有负面影响。各催化剂中,VMoN d(0.5%)/Ti催化剂显示了最佳的脱硝活性。并且,该催化剂还显示了优良的抗SO2、H2O性能。更多还原

【Abstract】 A series of plate-type V2 O5-MoO 3-Nd2 O3/TiO 2 catalysts with different amounts of neodymium were prepared to investigate the effect of neodymium addition on selective catalytic reduction(SCR) of NO with NH3. XRD, N2-adsorption, XPS, H2-TPR, Raman, NH3-TPD, and FT-IR were used to characterize the catalysts. It is found that with suitable addition of Nd(0.25 wt% and 0.5 wt% Nd2 O3) to V2 O5-MoO 3/TiO 2 catalyst not only improves the reduction property, but also increases the Oα/(Oα+Oβ) ratio of the catalyst, which results in the enhancement of catalytic efficiency. However, when the content of Nd2 O3 is excessive(0.75 wt% and 1 wt%), the acid sites of the catalysts decrease. Accordingly, the catalytic performance of these catalysts is relatively low. Moreover, the mechanical property of the catalyst declines when the content of Nd2 O3 is excessive. Among the catalysts investigated, VMoN d(0.5)/Ti catalyst has the best catalytic performance, and also exhibits good SO2 and H2 O resistance.更多还原