| 超声波对制备Co-Fe/硅藻土选择加氢催化剂的影响 |
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| 引用本文： | 刘自力,秦祖赠,李万伟.超声波对制备Co-Fe/硅藻土选择加氢催化剂的影响[J].分子催化,2009,23(3). |
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| 作者姓名： | 刘自力 秦祖赠 李万伟 |
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| 作者单位： | 1. 广州大学,化学化工学院,广东,广州,510006;广西大学,化学化工学院,广西,南宁,530004
2. 广西大学,化学化工学院,广西,南宁,530004 |
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| 基金项目： | 国家自然科学基金，广西高校百名中青年学科带头人资助计划 |
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| 摘 要： | 分别在有无超声条件下,采用分步浸渍法制备了负载型Co-Fe/硅藻土催化剂,以肉桂醛选择加氢为肉桂醇为探针反应,在固定床微分反应器上考察了催化剂的活性.采用热分析、红外、XRD及正电子寿命谱等技术分析了催化剂的催化性能及超声波对活性的影响.结果表明,经超声处理的催化剂对肉桂醛加氧为肉桂醇转化率、选择性和收率明显提高.超声处理没有改变催化剂载体的结构,但使主、助催化剂更好地分散在载体上,使催化剂表面的两类缺陷尺寸变小,同时增加第二类缺陷数量,有更好的催化活性.
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| 关 键 词： | 超声波 肉桂醛 肉桂醇 选择加氢 正电子寿命谱 |
Influence of Ultrasonic on Preparation of Co-Fe/Diatomite Catalysts for Selective Hydrogenation |
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| LIU Zi-li,QIN Zu-zeng,LI Wan-wei.Influence of Ultrasonic on Preparation of Co-Fe/Diatomite Catalysts for Selective Hydrogenation[J].Journal of Molecular Catalysis (China),2009,23(3). |
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| Authors: | LIU Zi-li QIN Zu-zeng LI Wan-wei |
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| Institution: | 1.School of Chemistry & Chemical Engineering;Guangzhou University;Guangzhou 510006;China;2.School of Chemistry & Chemical Engineering;Guangxi University;Nannin 530004;China |
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| Abstract: | Supported Co-Fe/Diatomite catalysts were prepared by step-by-step impregnation method with and without ultrasonic.The activities of Co-Fe/diatomite catalysts were investigated by the selectivity hydrogenation of cinnamaldehyde to cinnamyl alcohol in a fixed-bed differential reactor.The catalytic hydrogenation activity and the influence of ultrasonic to catalytic activity were studied by thermal analysis,IR,XRD and positron life spectra.The results reveal that the conversion,selectivity,and yield of selectiv... |
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| Keywords: | Ultrasonic Cinnamaldehyde Cinnamyl alcohol Selective hydrogenation Positron life spectra |
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