| Ru-Zn催化剂在苯选择加氢制环己烯反应中的粒径效应 |
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| 引用本文： | 孙海杰,陈凌霞,黄振旭,刘寿长,刘仲毅.Ru-Zn催化剂在苯选择加氢制环己烯反应中的粒径效应[J].高等学校化学学报,2015,36(10):1969. |
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| 作者姓名： | 孙海杰 陈凌霞 黄振旭 刘寿长 刘仲毅 |
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| 作者单位： | 1. 郑州大学化学与分子工程学院, 郑州 4500012. 郑州师范学院化学化工学院, 环境与催化工程研究所, 郑州 450044 |
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| 基金项目： | 国家自然科学基金(批准号: 21273205, U1304204)和河南省博士后科研项目 (批准号: 2013006)资助 |
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| 摘 要： | 采用共沉淀法制备了水溶性聚合物修饰的苯选择加氢制环己烯Ru-Zn催化剂, 并用X射线衍射、 透射电镜、 X射线能量色散谱、 X射线光电子能谱和氮气物理吸附等对加氢后催化剂进行了表征. 结果表明, 水溶性聚合物的种类和聚乙二醇-20000(PEG-20000)的用量对Ru-Zn催化剂微晶尺寸有显著影响. 在ZnSO4存在下, 随着Ru-Zn催化剂Ru微晶尺寸增加, 苯转化率降低, 环己烯最高收率则呈火山型变化趋势. 用0.4 g PEG-20000修饰的Ru-Zn催化剂m(PEG-20000)∶m(Ru)=0.2]Ru的微晶尺寸为4.8 nm, 环己烯最高收率为62.2%. Ru微晶尺寸影响催化剂表面的Zn/Ru原子比, 进而影响Ru-Zn催化剂性能.
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| 关 键 词： | 苯 选择加氢 环己烯 水溶性聚合物 粒径效应 |
| 收稿时间： | 2015-04-13 |
Particle Size Effect of Ru-Zn Catalysts on Selective Hydrogenation of Benzene to Cyclohexene† |
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| SUN Haijie,CHEN Lingxia,HUANG Zhenxu,LIU Shouchang,LIU Zhongyi.Particle Size Effect of Ru-Zn Catalysts on Selective Hydrogenation of Benzene to Cyclohexene†[J].Chemical Research In Chinese Universities,2015,36(10):1969. |
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| Authors: | SUN Haijie CHEN Lingxia HUANG Zhenxu LIU Shouchang LIU Zhongyi |
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| Institution: | 1. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China2. Institute of Environmental and Catalytic Engineering, College of Chemistry and Chemical Engineering,Zhengzhou Normal University, Zhengzhou 450044, China |
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| Abstract: | Ru-Zn catalysts modified by water soluble polymers were prepared by a precipitation method. The catalysts after hydrogenation were characterized by X-ray diffraction, transmission electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy and N2 physisorption. It was found that the type of water-soluble polymers and the dosage of PEG-20000 imposed a remarkable effect on the particle size of Ru. With the Ru particle size in Ru-Zn catalysts increasing, benzene conversion decreased, and the maximum cyclohexene yield showed a volcanic-type variation tendency. When the Ru particle size of the Ru-Zn catalyst modified by 0.4 g PEGm(PEG-20000)∶m(Ru)=0.2] was 4.8 nm, a maximum cyclohexene yield of 62.2% was obtained on this catalyst. The Ru particle size could produce an effect on the Zn/Ru atomic ratio on the catalyst surface, which was the primary reason why the Ru particle size could affect the performance of Ru-Zn catalysts. |
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| Keywords: | Benzene Selective hydrogenation Cyclohexene Water-soluble polymer Particle size effect |
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