A molecular approach to synergy generation in Co-Mo binary sulfide catalysts for hydrodesulfurization
Conference
·
OSTI ID:467991
- Osaka Univ. (Japan)
The mechanism of synergy generation between Co and Mo sulfides for Hydrodesulfurization was studied for highly dispersed Co-Mo binary sulfide clusters encaged in a NaY zeolite. It was shown by EXAFS, XRD, and HREM that highly dispersed Mo sulfides were prepared in the zeolite cages by sulfiding adsorbed Mo(CO){sub 6}. Highly dispersed Co-Mo binary mixed sulfides were synthesized in the zeolite cavities by using Mo(CO){sub 6} and Co(CO){sub 3}NO as precursors. It is concluded that thiophene hydrodesulfurization and butadiene hydrogenation take place on the Co sites of the Co-Mo binary sulfide clusters and that chemical bondings of Co-S-Mo are required for the synergy generation. Coordinatively unsaturated sites were detected by NO adsorption only on the Co sites of the Co-Mo mixed sulfides. It is proposed that the catalytic activities of the Co sites are promoted by electronic modifications induced by the Mo sulfides.
- OSTI ID:
- 467991
- Report Number(s):
- CONF-960652--
- Country of Publication:
- United States
- Language:
- English
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