载体对Ni-B催化剂邻氯硝基苯液相加氢性能的影响  

Effects of supports on catalytic properties of Ni-B amorphous alloy catalyst for liquid-phase hydrogenation of o-chloronitrobenzene

作　　者：房永彬[1] 

机构地区：[1]临沂师范学院实验与教育技术中心,山东临沂276005

出　　处：《工业催化》2006年第10期59-61,共3页Industrial Catalysis

基　　金：国家自然科学基金(NO.20276071)

摘　　要：以纳米碳管(CNTs)、活性三氧化二铝(-γAl2O3)、活性炭(AC)和二氧化硅(SiO2)为载体,Ni为活性组分,采用浸渍-化学还原法制备了负载型Ni-B非晶态合金催化剂,并利用SEM和TEM等表征手段对各催化剂的形貌进行了表征。以邻氯硝基苯的氢化为探针反应评价了各催化剂的催化性能。结果表明,在相同的反应条件下,以-γAl2O3和SiO2为载体的催化剂使底物转化率均较低,分别为40%和74.5%,但选择性相对较高,分别为96.8%和94.3%;而负载于CNTs和AC上的Ni-B使底物具有较高的转化率,均高于85%,选择性分别为95.5%和90.4%。根据对催化剂的物理表征,从载体的结构上对各催化剂催化性能产生的差异做出了理论解释。Ni-B amorphous alloy catalysts supported on carbon nanutubes （CNTs）,γ-Al2O3, activated carbon （AC） and SiO2, as the catalyst for liquid-phase hydrogenation of o-chloronitrobenzene, were prepared by impregnation-chemical-reduction method and characterized by TEM and SEM. The results showed that, under the same reaction condition, conversion of the substrate over Ni-B catalyst supported on γ-Al2O3 and SiO2 was relatively lower （40% and 74.5%, respectively） while selectivity to the target product was high（96.8% and 94.3%, respectively）; conversion of the substrate and selectivity to the target product over Ni-B catalyst supported on CNTs and AC were high （conversion of over 85 %, and selectivity of 95.5 % and 90.4 %, respectively）. The causes behind the difference was discussed from the aspect of structure of the supports.

关 键 词：载体 催化加氢 非晶态合金 镍催化剂 邻氯硝基苯 

分 类 号：TQ426.65[化学工程] O643.38[理学—物理化学]