| Ru/Mn_xCe_(1-x)O_2催化苯甲醇液相氧化制苯甲醛 |
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| 引用本文： | 汤清虎,王京,石倩倩,赵卉茹,魏志伟,赵培正.Ru/Mn_xCe_(1-x)O_2催化苯甲醇液相氧化制苯甲醛[J].河南师范大学学报(自然科学版),2014(2):73-77. |
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| 作者姓名： | 汤清虎 王京 石倩倩 赵卉茹 魏志伟 赵培正 |
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| 作者单位： | 河南师范大学化学化工学院; |
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| 基金项目： | 国家自然科学基金(21301051) |
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| 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.
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| 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 |
Liquid-phase Oxidation of Benzyl Alcohol to Benzaldehyde over Ru/Ru/Mn_xCe_(1-x)O_2 Catalyst |
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| Affiliation: | ,School of Chemistry and Chemical Engineering,Henan normal University |
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| Abstract: | Ru/Mnx Ce1-x O2 were prepared by three different methods,and used as the support of 2.5%Ru/Ru/Mnx Ce1-x O2catalyst.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/Mnx Ce1-x O2catalysts were investigated.The results showed the highest activity when the Ru/Mnx Ce1-x O2support with n(Mn)∶n(Mn+Ce)=0.50was prepared by the sol-gel method and calcined at 773K.Up to 68.1% of benzaldehyde yield was achieved at 333Kin 1h.The characterizations of XRD,N2physissorption and SEM suggested that the synthesized Mn0.5Ce0.5O2-sol-gel 773Ksupport possessed the perfect pore structure,larger surface area,and much more highly dispersed cerium-manganese mixed oxide species. |
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| Keywords: | benzyl alcohol benzaldehyde molecular oxygen ruthenium heterogeneous catalyst cerium-manganese mixed oxide |
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