Intrinsic Thiophene Hydrodesulfurization Kinetics of a Sulfided NiMo/SiO2 Model Catalyst: Volcano-Type Behavior
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- 作者：A. Borgna ; E.J.M. Hensen ; L. Coulier ; M.H.J.M. de Croon ; J.C. Schouten ; J.A.R. van Veen and J.W. Niemantsverdriet
- 关键词：model catalysts ; hydrodesulfurization ; intrinsic kinetics ; NiMo/SiO2 catalyst
- 刊名：Catalysis Letters
- 出版时间：2003
- 出版年：2003
- 期刊代码：13_1011372X
- 类别：ch
- 卷：90
- 期：3/4
- 页码：117-122
- 数据来源：sp
摘要
A realistic planar model of a silica-supported NiMo sulfide hydrotreating catalyst was used to study the intrinsic kinetics of thiophene hydrodesulfurization over a broad temperature range at atmospheric pressure. The specific nonporous nature of the model catalysts excludes possible diffusion limitations, which are commonly encountered in kinetic studies of their industrial porous analogues. The unique possibility to measure the intrinsic chemical kinetics over a large temperature range allowed us to observe a Volcano-type behavior for thiophene hydrodesulfurization. The specific kinetic parameters are discussed in terms of possible mechanisms.