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

Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (11): 2121.

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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. 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

Abstract

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

CLC Number:

O643

TrendMD:

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]. Chem. J. Chinese Universities, 2002, 23(11): 2121.

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

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