【摘要】 以堇青石蜂窝陶瓷为载体,CuxCe1-xO2-x/SBA-15为催化活性组分,制备了一系列10%~60%Cu0.5Ce0.5O1.5/SBA-15/堇青石和50%CuxCe1-xO2-x/SBA-15/堇青石(x=0~1)整体式催化剂,采用低温氮吸附-脱附、XRD、XPS和H2-TPR对催化剂进行了表征,在微型固定床反应器中评价了催化剂的CO催化氧化活性。结果表明:整体式催化剂仍然保持SBA-15的介孔结构,催化剂中除了堇青石的物相外,还有CuO和CeO2物相,催化剂表面的Cu以Cu2+和Cu+两种状态存在,Ce以Ce4+状态存在,催化剂表面的氧化还原性能与Cu0.5Ce0.5O1.5的含量和Cu、Ce的比例有一定的关系,50%Cu0.5Ce0.5O1.5/SBA-15/堇青石催化剂具有最好催化活性,CO可以在140℃完全转化。更多还原

【Abstract】 Cu0.5Ce0.5O1.5/SBA-15/cordierite monolithic catalysts with the Cu0.5Ce0.5O1.5 content from 10% to 60% and 50%CuxCe1-xO2-x/SBA-15/cordierite(x=0~1) monolithic catalysts were prepared using the cordierite as the support and the CuxCe1-xO2-x/SBA-15 as the catalytic component.The catalysts were characterized using Low Temperature Nitrogen Adsorption-Desorption,XRD,XPS and H2-TPR.The catalytic activity of the catalysts for the oxidation of CO was evaluated.The results indicate that the mesoporous structure of SBA-15 is retained in the monolithic catalysts.There are the CuO and CeO2 phases in addition to the cordierite phase.On the surface of the catalyst Cu exists as Cu2+ and Cu+ species and Ce is as Ce4+ species.The redox performance of the monolithic catalysts is related with the Cu0.5Ce0.5O1.5 content and the ratio of the Cu and Ce in the CuxCe1-xO2-x/SBA-15.50%Cu0.5Ce0.5O1.5/SBA-15/cordierite monolithic catalyst exhibits the best catalytic activity.CO can be completely oxidized at 140 ℃.更多还原