| 还原条件对Pd/Al2O3催化剂上对硝基苯酚加氢性能的影响 |
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| 引用本文： | 李冬燕,陈日志. 还原条件对Pd/Al2O3催化剂上对硝基苯酚加氢性能的影响[J]. 南京工业大学学报(自然科学版), 2012, 34(2): 63-66 |
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| 作者姓名： | 李冬燕 陈日志 |
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| 作者单位： | 1. 南京化工职业技术学院化学工程系,江苏南京,210048
2. 南京工业大学膜科学技术研究所,江苏南京,210009 |
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| 基金项目： | 国家自然科学基金资助项目(20806038) |
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| 摘 要： | 用过量浸渍-液相还原法制备Pd/Al2 O3催化剂,采用等离子发射光谱仪(ICP)、X线衍射仪(XRD)对催化剂进行表征,并在对硝基苯酚催化加氢反应中考察其催化性能.结果表明:还原剂的类型、还原温度和还原时间对Pd/Al2 O3催化剂的晶型和活性影响显著.当采用水合肼(N2 H4·H2O)作还原剂、0℃还原30 min时,催化剂表现出较高的对硝基苯酚加氢活性,加氢速率达到22.7 mmol/(min·g),对氨基苯酚的选择性为100％,收率为99％.与工业常用骨架Ni催化剂的性能进行比较,Pd/Al2 O3催化剂在活性、选择性和稳定性都明显优于骨架Ni催化剂.
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| 关 键 词： | Pd Al2 O3 对硝基苯酚 浸渍 液相还原 |
Effects of reduction conditions on hydrogenation of p-nitrophenol by Pd/Al2O3 catalysts |
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| LI Dongyan , CHEN Rizhi. Effects of reduction conditions on hydrogenation of p-nitrophenol by Pd/Al2O3 catalysts[J]. Journal of Nanjing University of Technology, 2012, 34(2): 63-66 |
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| Authors: | LI Dongyan CHEN Rizhi |
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| Affiliation: | 1.Department of Chemical Engineering,Nanjing College of Chemical Technology,Nanjing 210048,China; 2.Membrane Science & Technology Research Center,Nanjing University of Technology,Nanjing 210009,China) |
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| Abstract: | Pd/Al2 O3 catalysts were prepared by the excessive impregnation-chemical reduction method and characterized by inductive coupled plasma(ICP) and X-ray diffraction(XRD).The effects of reduction conditions such as reduction agents,reduction temperature and reduction time,were investigated in hydrogenation of p-nitrophenol.Results showed that the reduction conditions affected the catalyst crystallite and activity.The Pd/Al2O3 reduced at 0 ℃ for 30 min by N2H4·H2O showed the best catalytic performance.The hydrogenation rate of 22.7 mmol/(min·g),p-aminophenol selectivity of 100%,and the yield of 99%,were obtained.In comparison with raney-Ni,the prepared Pd/Al2O3 catalyst exhibited higher catalytic activity,selectivity and stability. |
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| Keywords: | palladium alumina p-nitrophenol impregnation chemical reduction |
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