| 脂肪腈加氢胺化过程中Pd/C催化剂失活原因探讨 |
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| 引用本文： | 张建远,康保安.脂肪腈加氢胺化过程中Pd/C催化剂失活原因探讨[J].化学通报,2006,69(9):696-700. |
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| 作者姓名： | 张建远 康保安 |
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| 作者单位： | 中国日用化学工业研究院表面活性剂国家工程研究中心 太原030001 |
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| 摘 要： | 以活性炭为载体,负载氯化钯溶液,制备钯/炭催化剂,在循环使用于催化脂肪腈加氢制备单烷基二甲基叔胺时发现,催化剂活性持续下降。通过氮吸附、热重分析、X射线能谱和透射电子显微镜等手段,对催化剂失活前后的表面积、孔径分布变化、催化剂的失重状况、Pd的价态变化以及Pd晶粒的粒径变化研究表明,导致钯/炭催化剂失活的原因主要是反应过程中积炭的生成、Pd的价态变化和Pd晶粒粒径的增大。
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| 关 键 词： | 钯/炭催化剂 失活 积炭 脂肪腈 叔胺 |
| 收稿时间： | 2005-12-15 |
| 修稿时间： | 2005-12-152006-04-25 |
Study on Pd/C Catalysts Deactivation during the Process of Fatty Nitrile Hydroamination |
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| Zhang Jianyuan,Kang Bao''''an.Study on Pd/C Catalysts Deactivation during the Process of Fatty Nitrile Hydroamination[J].Chemistry,2006,69(9):696-700. |
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| Authors: | Zhang Jianyuan Kang Bao'an |
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| Institution: | China Research Institute of Daily Chemical Industry, National Engineering Research Center for Surfactants,Taiyuan 030001 |
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| Abstract: | The hydrogenation of fatty nitriles to produce alkyl-dimethyl tertiary amines was catalyzed by the Pd/C catalysts prepared by the PdCl_2 solution carried on the active carbon. The results indicated that the activity of Pd/C catalysts was continuously decreased as increasing of the used times. The surface area, pore size distribution, the state of losing weight of the catalysts, the change of the valence state of Pd and the change of the particle diameter Pd crystalloid were investigated by the N_2-adsorption, TG, XPS and TEM. It was found that the formation of carbon during reaction, change of the valence state of Pd and chang of the particle diameter of Pd crystalloid before and after using were the cause of Pd/C deactivation mainly. |
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| Keywords: | Pd/C Deactivation Carbon deposition Fatty nitrile Tertiary amine |
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