| 新型Raney-Ni制备过程中的XRD,SEM和EDAX研究 |
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| 引用本文： | 雷浩,宋真,谭大力,包信和,慕旭宏,宗保宁,闵恩泽.新型Raney-Ni制备过程中的XRD,SEM和EDAX研究[J].高等学校化学学报,2002,23(11):2121-2124. |
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| 作者姓名： | 雷浩 宋真 谭大力 包信和 慕旭宏 宗保宁 闵恩泽 |
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| 作者单位： | 1. 中国科学院大连化学物理研究所催化基础国家重点实验室, 大连116023;
2. 中国石油化工总公司石油化工科学研究院, 北京100083 |
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| 基金项目： | 中国石油化工总公司石油化工科学研究院合作课题资助 |
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| 摘 要： | 采用急冷法及预处理制备Raney-Ni原始合金,以XRD,SEM和EDAX手段研究了其活化过程.此方法制备的Raney-Ni原始合金与传统方法制备的相比,晶粒变小,Ni2Al3相增多,从而使其具有中心为大量Ni2Al3,外围为少量NiAl3包裹的独特结构,使活化始终以铝向表面迁移为控制步骤,活化后残留较多的Ni2Al3相,催化剂中活性Ni均匀分布在残留的Ni2Al3上.
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| 关 键 词： | Raney-Ni 急冷 活化 Ni2 Al3 |
| 文章编号： | 0251-0790(2002)11-2121-04 |
| 收稿时间： | 2002-01-18 |
XRD, SEM and EDAX Studies of the Preparation Process of Novel Raney-Ni Catalyst |
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| LEI Hao ,SONG Zhen ,TAN Da-Li ,BAO Xin-He ,MU Xu-Hong ,ZONG Bao-Ning ,MIN En-Ze.XRD, SEM and EDAX Studies of the Preparation Process of Novel Raney-Ni Catalyst[J].Chemical Research In Chinese Universities,2002,23(11):2121-2124. |
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| Authors: | LEI Hao SONG Zhen TAN Da-Li BAO Xin-He MU Xu-Hong ZONG Bao-Ning MIN En-Ze |
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| Institution: | 1. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
2. Research Institute of Petroleum Processing, Beijing 100083, China |
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| Abstract: | The preparation of the novel Raney-Ni by leaching Ni-Al starting alloys which prepared by melt-quenching and pretreatment was studied by XRD, SEM and EDAX. The existence of particles with the smaller size of crystallite and more contents of Ni 2Al 3 phase in the melt-quenched starting alloys result in the structure in which more Ni 2Al 3 phase exist in the bulk and less NiAl 3 on the top layer, thus the migration of Al component from bulk to top layer become the rate-controlling step in the leaching process, leaving more Ni 2Al 3 residue and making the active nickel disperse on the residual Ni 2Al 3 uniformly. |
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| Keywords: | Raney-Ni Melt-quenching Activation Ni 2Al 3 |
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