纳米纤维状γ-Al_2O_3为载体的稀土催化剂  

Rare earth oxides catalyst with nano fibrous γ-Al_2O_3 supporter

作　　者：张鹏远 李玉静[1] 陈建峰[1] 

机构地区：[1]北京化工大学教育部超重力工程研究中心,北京100029

出　　处：《无机盐工业》2005年第11期23-25,共3页Inorganic Chemicals Industry

基　　金：教育部科学技术研究重大项目(项目编号:重大0102);国家863计划(项目编号:2002AA302605)

摘　　要：分别以超重力法制备的纳米纤维状γ-Al2O3和普通γ-Al2O3为载体,采用浸渍法制备了相同组分LaCeCuMn的纳米稀土催化剂,并应用微反活性评价装置测试了对CO和C3H8的氧化活性.利用XRD,TEM,BET等手段,分析了产品的结构和粒子形貌.实验结果表明,与以普通γ-Al2O3为载体的催化剂相比,催化剂活性组分在纳米纤维状γ-Al2O3载体上分散比较均匀,平均粒径为15～20 nm,为纳米级催化剂;CO和C3H8氧化反应中起燃温度分别可以达到161,186℃,且二者的最终转化率均在99%以上.The nano fibrous γ-Al2O3 and common γ-Al2O3 supporter are prepared by high gravity reaction respectively. Then, the nano rare earth catalyst LaCeCuMn supported with γ-Al2O3 is prepared by impregnation method. The oxidation activity of the catalyst for CO and C3H8 is determined by micro - reaction activity evaluation device. The structure and morphogy of the product are analysed by XRD, TEM and BET. The test results show that the active component of the catalyst can disperse uniformly on the nano fibrous γ-Al2O3 supporter compared with the commnon γ-Al2O3 supporter. The average particle size is between 15 ～ 20 nm, which belongs to nano -grade catalyst. The starting combustion temperature for the oxidation of Co and C3H8 is 161℃ and 186℃ respectively,and the final conversion rate for both Co and C3H8 is above 99%.

关 键 词：稀土催化剂 纳米纤维载体 Γ-AL2O3 

分 类 号：TQ133.3[化学工程—无机化工]