Abstract
Zeolite-supported highly dispersed Co sulfide clusters are synthesized using Co(CO)3 (NO) as a precursor. The amount of Co inCoSx/zeolite anchored by a CVD technique increases as the Al/Si ratio of the zeolite increases, whereas the activity per Co atomdecreases for thiophene hydrodesulfurization (HDS). When an Na-exchanged USY zeolite is used, the Co sulfide catalyst shows a muchhigher HDS activity than a conventional Co—Mo/Al2 O3 catalyst. It is considered from XAFS and NO adsorption techniques that thehigh HDS activity of CoSx/USY-Na is due to an extremely high dispersion of Co sulfide clusters.
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Kubota, T., Okamoto, H. & Okamoto, Y. Hydrodesulfurization activity of highly dispersed Co sulfide clusters prepared in zeolite cages. Catalysis Letters 67, 171–174 (2000). https://doi.org/10.1023/A:1019021706546
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DOI: https://doi.org/10.1023/A:1019021706546