The catalytic removal of NOx under lean condi- tions is one of the most important targets in catalysis re- search. The activities of metal oxides, zeolite-based catalysts and noble metal catalysts together with the fa...The catalytic removal of NOx under lean condi- tions is one of the most important targets in catalysis re- search. The activities of metal oxides, zeolite-based catalysts and noble metal catalysts together with the factors are influ- encing the selective reduction of NOx with hydrocarbons are reviewed. The reaction mechanisms for the three types of catalysts are briefly discussed. Recent progress in combined catalyst and NOx storage reduction catalysts is also intro- duced. Finally, future research directions are forecasted.展开更多
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...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%。展开更多
文摘The catalytic removal of NOx under lean condi- tions is one of the most important targets in catalysis re- search. The activities of metal oxides, zeolite-based catalysts and noble metal catalysts together with the factors are influ- encing the selective reduction of NOx with hydrocarbons are reviewed. The reaction mechanisms for the three types of catalysts are briefly discussed. Recent progress in combined catalyst and NOx storage reduction catalysts is also intro- duced. Finally, future research directions are forecasted.
文摘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%。
