Insight into the effect of non-stoichiometric sulfur on a NiMoS hydrodesulfurization catalyst
Insight into the effect of non-stoichiometric sulfur on a NiMoS hydrodesulfurization catalyst
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深入了解非化学计量硫对 NiMoS 加氢脱硫催化剂的影响
DOI：
10.1039/c5cy01142f
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发表时间：
2016-01
影响因子：
5
通讯作者：
Fang Weiping
中科院分区：
文献类型：
--
作者：
Lai Weikun;Xu Yingrui;Ren Yuhong;Yang Lefu;Zheng Jinbao;Yi Xiaodong;Fang Weiping
本研究的发现为NiMoS模型提供了新的见解，揭示了NiMoS边缘和气相之间存在硫的动态平衡。由于非化学计量硫在加氢脱硫反应初始阶段的迅速演化，硫的动态平衡并没有引起人们的关注。结果表明，Ni-Mo-S边缘上的过量硫可被氢还原形成SH基团并释放出H2S，从而使NiMoS边缘的硫覆盖率较低，配位不饱和位（CUS）显著增加，从而具有优异的HDS活性。除了阐明非化学计量硫对NiMoS结构的影响外，还定量研究了H_2S分压、Sx与HDS活性之间的关系。这些研究结果将有助于加深对MoS 2催化剂上加氢脱硫反应的认识，并对燃料油超深度加氢脱硫的研究起到指导作用。
The findings in this study provide new insight into the NiMoS model, revealing that there is a sulfur dynamic equilibrium between the NiMoS edge and the gas phase. Since the evolution of non-stoichiometric sulfur proceeds rapidly at the initial stage of hydrodesulfurization reaction, the sulfur dynamic equilibrium does not draw so much attention. The results indicate that excess sulfur on the Ni–Mo–S edge can be reduced by hydrogen to form SH groups and release H2S, which lead to a low sulfur-covered NiMoS edge and a significant increase in coordinatively unsaturated sites (CUS), resulting in an outstanding HDS activity. Apart from elucidating the effect of non-stoichiometric sulfur on the NiMoS structure, the relationship among H2S partial pressure, Sx and HDS activity has been quantitatively studied. It is expected that these results will be used to deepen the understanding of HDS reaction over promoted MoS2 catalysts, as well as to guide the research on ultra-deep HDS of fuel oils.
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DOI：
10.1021/la2025654
发表时间：
2011-09
期刊：
Langmuir : the ACS journal of surfaces and colloids
影响因子：
--
作者：
Xiao-lin Tang;Li Shi
通讯作者：
Xiao-lin Tang;Li Shi
DOI：
10.1016/s0167-2991(08)63206-1
发表时间：
1993
期刊：
Studies in Surface Science and Catalysis
影响因子：
--
作者：
T. Kabe;A. Ishihara;W. Qian;S. Ogawa;H. Sakuno
通讯作者：
T. Kabe;A. Ishihara;W. Qian;S. Ogawa;H. Sakuno
影响因子：
7.3
作者：
F. Massoth;T. Koltai;P. Tétényi
通讯作者：
F. Massoth;T. Koltai;P. Tétényi
影响因子：
2.8
作者：
V. Kogan;A. A. Greish-A.;G. V. Isagulyants
通讯作者：
V. Kogan;A. A. Greish-A.;G. V. Isagulyants
影响因子：
7.3
作者：
Mingyong Sun;A. Nelson;J. Adjaye
通讯作者：
Mingyong Sun;A. Nelson;J. Adjaye