In order to further improve the resistance of the catalysts to H₂O and SO₂ during the selective catalytic reduction of NO with C₃H₈ (SCR-C₃H₈), Ce was used to modify the Fe-based catalysts. Sol–gel and impregnation methods were adopted to prepare the monolithic cordierite Ce–Fe/Al₂O₃ catalysts and the SCR-C₃H₈ testes were carried out in a flow reactor, electrically heated up to 600 °C, and with simulated a flue gas rate of 1.5 L/min. The physical chemical properties of the catalysts were characterized by XRD, N₂ adsorption–desorption, SEM, H₂-TPR and FT-IR spectra of adsorbed pyridine, etc. Results show that the introduction of Cerium notably enhances the resistance of the Fe/Al₂O₃/Cordierite catalysts to SO₂. 3.5Ce–Fe/Al₂O₃/Cordierite has the highest C₃H₈-SCR activity, e.g., the NO reductions are 96.5% and 93% at 600 °C when there was no and 0.02% SO₂ in the flue gas, respectively. While the NO reduction by Fe/Al₂O₃/Cordierite decreased from 88 to 80% in the presence of 0.02% SO₂. The addition of Cerium to iron oxide leads to an increase in the Lewis acid sites and the redox property of the catalysts. However, an overload of cerium will reduce the crystallinity of iron oxide nanorods and inhibit the formation of the NO₂/NO₃⁻ species in the C₃H₈-SCR reaction, resulting in a decrease in the NO reduction.

为了进一步提高用C ₃ H ₈（SCR-C ₃ H ₈）选择性催化还原NO的过程中催化剂对H ₂ O和SO ₂的耐受性，使用Ce对Fe基催化剂进行改性。采用溶胶-凝胶法和浸渍法制备堇青石整体式Ce-Fe / Al ₂ O ₃催化剂，SCR-C ₃ H ₈试样在流动反应器中进行，电加热至600°C，并模拟烟气速率为1.5 L / min。通过XRD，N ₂吸附-解吸，SEM，H ₂表征了催化剂的物理化学性质。吸附吡啶的-TPR和FT-IR光谱等。结果表明，铈的引入显着增强了Fe / Al ₂ O ₃ /堇青石催化剂对SO ₂的耐受性。3.5Ce–Fe / Al ₂ O ₃ /堇青石具有最高的C ₃ H ₈ -SCR活性，例如，在烟气中不存在SO ₂和0.02％SO _{2的情况下}，在600°C下NO的还原率分别为96.5％和93％。， 分别。在0.02％SO ₂的存在下，Fe / Al ₂ O ₃ /堇青石的NO还原率从88％降低至80％。将铈添加到氧化铁中导致路易斯酸位点的增加和催化剂的氧化还原性质。但是，铈的过载会降低的氧化铁纳米棒的结晶性和抑制NO的形成₂ / NO ₃ ^-在C物种₃ ħ ₈ -SCR反应，导致在还原NO的降低。