【摘要】 考察了反应温度对-γA l2O3、CeO2-La2O3和CeO2-La2O3/-γA l2O3催化CO还原SO2到单质硫活性的影响。采用XRD表征了催化剂反应前后的物相变化。结果表明,温度过低或过高均不利于-γA l2O3催化CO还原SO2的反应。-γA l2O3的介入提高了CeO2和La2O3的分散性,使Redox和COS两种反应机理在同一催化剂上的协同作用增强,使CeO2-La2O3/-γA l2O3在催化还原SO2的反应中具有更低的反应温度和更高的活性。更多还原

【Abstract】 The influences of reaction temperature on activity of γ-Al₂O₃,CeO₂-La₂O₃ and CeO₂-La₂O₃/γ-Al₂O₃ were investigated for the reduction of SO₂ to elemental sulfur by CO.The phase structure of（γ-Al₂O₃,） CeO₂-La₂O₃ and CeO₂-La₂O₃/γ-Al₂O₃ before and after reaction was characterized by XRD.The results showed that excessively low or high temperature would not favor reduction SO₂ to elemental sulfur over γ-Al₂O₃.Introduction of γ-Al₂O₃ enhanced the dispersity of CeO₂ and La₂O₃ and promoted the synergism between Redox reaction and COS intermediate reaction over CeO₂-La₂O₃/γ-Al₂O₃,resulting in lower reaction temperature and higher activity.更多还原