MoS2 morphology and promoter segregation in commercial Type 2 Ni-Mo/Al2O3 and Co-Mo/Al2O3 hydroprocessing catalysts

被引：146
作者：
Eijsbouts, S
van den Oetelaar, LCA
van Puijenbroek, RR
机构：
[1] Albemarle Catalysts, Res Ctr, NL-1030 BE Amsterdam, Netherlands
[2] Akzo Nobel, Res & Technol Chem, NL-6800 SB Arnhem, Netherlands
来源：
JOURNAL OF CATALYSIS | 2005年 / 229卷 / 02期
关键词：
molybdenum sulfide; nickel sulfide; cobalt sulfide; hydrotreating catalysts; sulfidation (scanning) transmission electron microscopy-energy-dispersive X-ray analysis ((S)TEM-EDX); X-ray diffraction analysis (XRD); morphology; stacking; segregation;
D O I：
10.1016/j.jcat.2004.11.011
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：
A series of commercial liquid-phase-sulfided Type 2 Ni-Mo/Al2O3 and Co-Mo/Al2O3 catalysts used in different trickle-phase reactions has been characterized by (scanning) transmission electron microscopy combined with energy-dispersive X-ray analysis ((S)TEM-EDX) and X-ray diffraction (XRD) analysis. In contrast to what is reported for H2S/H-2 sulfided Type 2 model catalysts, MoS2 stacking is not prominent in liquid-phase sulfided Type 2 commercial catalysts. The presence or absence Of MoS2 stacking has been shown to be highly dependent on the sulfidation procedure applied. Although Type 2 commercial Ni-Mo catalysts have high MoS2 dispersion, there is a significant Ni sulfide segregation. This is not the case for their Co-containing counterparts. (C) 2004 Elsevier Inc. All rights reserved.
引用
收藏
页码：352 / 364
页数：13
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