MOS2 STRUCTURES IN HIGH-ACTIVITY HYDROTREATING CATALYSTS .2. EVOLUTION OF THE ACTIVE PHASE DURING THE CATALYST LIFE-CYCLE - DEACTIVATION MODEL

被引：55

作者：

EIJSBOUTS, S ^{[1
]}

HEINERMAN, JJL ^{[1
]}

ELZERMAN, HJW ^{[1
]}

机构：

[1] AKZO NV,RES LABS ARNHEM,6800 SB ARNHEM,NETHERLANDS

来源：

APPLIED CATALYSIS A-GENERAL | 1993年 / 105卷 / 01期

关键词：

DEACTIVATION; DISPERSION; HYDRODENITROGENATION; NICKEL-MOLYBDENUM ALUMINA; SULFIDATION; TRANSMISSION ELECTRON MICROSCOPY;

D O I：

10.1016/0926-860X(93)85134-B

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Transmission electron microscopy (TEM) has been applied to study the changes of the dispersion and homogeneity of a sulfidic Ni-Mo/Al2O3 catalyst during its life cycle. By using a semi-quantitative evaluation method for the TEM data, a correlation is found between the hydrodenitrogenation (HDN) activity and the MoS2 dispersion. The deactivation appears to be related to the loss of MoS2 dispersion. Regeneration of spent catalyst not only removes coke but also restores the MoS2 dispersion. A model describing the evolution of the active phase during the catalyst life is proposed.

引用

页码：69 / 82

页数：14

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