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采用浸渍法制备了CuO/Al2O3、CeO2/Al2O3和CuO-CeO2/Al2O3这3种催化剂,通过氮吸附、SEM、XRD等手段对催化剂的结构及组成进行了表征,利用固定床反应装置考察了活性组分、气体流量、催化反应温度对萘催化氧化性能的影响.结果表明,18%CeO2/Al2O3的萘催化活性较低,18%CuO/Al2O3和9%CuO-9%CeO2/Al2O3的活性较高,两者在300℃时对萘的去除率分别达到91%和89%;CuO-CeO2/Al2O3催化剂具有比CuO/Al2O3更好的低温活性;气流量的变化对两种催化剂性能的影响不大.
The catalysts CuO / Al 2 O 3, CeO 2 / Al 2 O 3 and CuO-CeO 2 / Al 2 O 3 were prepared by impregnation method. The structure and composition of the catalyst were characterized by nitrogen adsorption, SEM and XRD. The immobilized bed reactor was used to investigate the activity The results showed that the naphthalene catalytic activity of 18% CeO2 / Al2O3 was lower than that of 18% CuO / Al2O3 and 9% CuO-9% CeO2 / Al2O3 High, the removal rates of naphthalene reach 91% and 89% respectively at 300 ℃; CuO-CeO2 / Al2O3 catalyst has better low temperature activity than CuO / Al2O3; the influence of gas flow rate on the performance of the two catalysts is not Big.