摘要
以溶胶凝胶法合成镱改性的铬掺杂的介孔氧化铝催化剂Yb-Cr/Al2O3,通过X-射线衍射(XRD)、N2吸附-脱附等温线(BET)、程序升温还原(TPR)、透射电镜(TEM)等现代分析手段对制备的催化剂的结构进行表征。结果表明,稀土镱的引入使铬负载的介孔氧化铝表面更规整,结构更稳定。将催化剂用于以过氧化氢为氧化剂的苯氧化反应进行催化剂活性评价,Yb-Cr/Al2O3比Cr/Al2O3表现出了更高的苯转化率和苯酚选择性。
The effect of rare earth oxides（Yb） on the properties of alumina with a well-defined mesopores structure prepared by the sol method was studied.The samples were characterized by XRD,BET and TEM.Catalytic activity of catalysts were tested by oxidation of benzene to phenol using H2O2 as oxidant.The results show that the additives increased the yield and selectivity.
出处
《安徽化工》
CAS
2010年第3期19-22,共4页
Anhui Chemical Industry
关键词
镱
氧化铝
苯
氧化
Yb
mesoporous alunina
benzene
oxidation
