【摘要】 采用水热法制备钛交联蒙脱土,SO2-4改性后作为载体,担载上铜,制成铜基SO2-4改性钛交联蒙脱土(Cu Ti PILM/SO2-4)催化剂,用C3H6作还原剂,考察了贫燃条件下不同空速、不同氧浓度以及H2O对催化剂活性的影响。结果表明,SO2-4用量w(SO2-4)为30%、Cu2+担载量w(Cu2+)为5%、500℃焙烧制得的Cu Ti PILM/SO2-4催化活性高,反应温度为250℃时,能使NO转化率高达70 6%,在水蒸气存在下,NO最大转化率仅下降7 0%。更多还原

【Abstract】 Ti-pillared montmorillonite was prepared by hydrothermal synthesis method,then treated with SO^2-₄ to form the modified support and loaded with Cu²⁺to form the catalyst Cu-Ti-PILM/SO^2-₄.The effects of O₂ concentration,space velocity and H₂O on catalytic activity of NO reduction with propene as reductant in the presence of excess oxygen were investigated.The results showed that the catalyst modified by 30% SO^2-₄,loaded with 5% Cu²⁺and calcined at 500 ℃ had high catalytic activity.NO conversion was 70.6% at 250 ℃.The NO conversion only decreased by 7.0% in the presence of H₂O.更多还原