Ru/Mn_xCe_(1-x)O_2催化苯甲醇液相氧化制苯甲醛  

Liquid-phase Oxidation of Benzyl Alcohol to Benzaldehyde over Ru/Ru/Mn_xCe_(1-x)O_2 Catalyst

作　　者：汤清虎[1] 王京[1] 石倩倩[1] 赵卉茹[1] 魏志伟[1] 赵培正[1] 

机构地区：[1]河南师范大学化学化工学院,河南新乡453007

出　　处：《河南师范大学学报（自然科学版）》2014年第2期73-77,共5页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(21301051)

摘　　要：采用3种不同方法制备了Mnx Ce1-x O2载体,并通过负载Ru制得2.5%Ru/Ru/Mnx Ce1-x O2催化剂,考察了载体的制备方法、焙烧温度及n(Mn)∶n(Mn+Ce)对催化剂活性的影响.实验结果表明,由溶胶-凝胶法、n(Mn)∶n(Mn+Ce)=0.50、773K下焙烧制备的载体所制得的2.5%Ru/Ru/Mnx Ce1-x O2催化剂的活性最高,在333K下反应1h,苯甲醛产率达67.4%.XRD、N2物理吸附及SEM表征表明,该条件下制备的Mn0.5Ce0.5O2-sol-gel-773K载体具有完整的孔结构,较大的比表面积,且能够形成较多高分散的Ce-Mn-O复合氧化物.Ru/Mn_xCe_1-xO_2 were prepared by three different methods, and used as the support of 2.5%Ru/Ru/Mn_xCe_1-xO_2 catalyst. Effects of preparation method for the support, calcination temperature of the support, and n_（Mn）：n_（Mn＋Ce）） on catalytic activity of 2.5%Ru/Ru/Mn_xCe_1-xO_2 catalysts were investigated. The results showed the highest activity when the Ru/MnxCe_1-xO_2 support with n_（Mn）：n_（Mn＋Ce） = 0. 50 was prepared by the sol-gel method and calcined at 773 K. Up to 68.1% of benzaldehyde yield was achieved at 333 K in 1 h. The characterizations of XRD, Nz physissorption and SEM suggested that the synthesized Mno.5Ce0.502-sol-gel-773K support possessed the perfect pore structure, larger surface area, and much more highly dispersed cerium-manganese mixed oxide species.

关 键 词：苯甲醇 苯甲醛 分子氧 钌多相催化剂 铈锰复合氧化物 

分 类 号：O643[理学—物理化学]