高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (11): 2121.

• 研究论文 • 上一篇    下一篇

新型Raney-Ni制备过程中的XRD,SEM和EDAX研究

雷浩1, 宋真1, 谭大力1, 包信和1, 慕旭宏2, 宗保宁2, 闵恩泽2   

  1. 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
  • 收稿日期:2002-01-18 出版日期:2002-11-24 发布日期:2002-11-24
  • 通讯作者: 包信和(1959年出生),男,博士,研究员,博士生导师,从事催化和表面化学研究.E-mail:xhbao@dicp.ac.cn E-mail:xhbao@dicp.ac.cn
  • 基金资助:

    中国石油化工总公司石油化工科学研究院合作课题资助

XRD, SEM and EDAX Studies of the Preparation Process of Novel Raney-Ni Catalyst

LEI Hao1, SONG Zhen1, TAN Da-Li1, BAO Xin-He1, MU Xu-Hong2, ZONG Bao-Ning2, MIN En-Ze2   

  1. 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
  • Received:2002-01-18 Online:2002-11-24 Published:2002-11-24

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.

关键词: Raney-Ni, 急冷, 活化, Ni2 Al3

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 Ni2Al3 phase in the melt-quenched starting alloys result in the structure in which more Ni2Al3 phase exist in the bulk and less NiAl3 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 Ni2Al3 residue and making the active nickel disperse on the residual Ni2Al3 uniformly.

Key words: Raney-Ni, Melt-quenching, Activation, Ni2Al3

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