Sintering and redispersion of platinum in reforming catalyst
- Univ. of Petroleum, Beijing (China)
Platinum sintering and redispersion were systematically investigated with PtRe and PtSn reforming catalysts. It was found that platinum might sinter both in catalyst dehydration for exsiccation during start-of-run and in coke burning during regeneration and had the same sintering mechanism as the followings PtO{sub 2}{r_reversible}Pt+O{sub 2}, except melt of alumina supporter. The sintered platinum could be completely redispersed through regeneration if the alumina had no decrease in its surface area. Otherwise the loss in the platinum dispersion or dehydrogenation activity of the catalyst after regeneration would be proportional to the loss in surface area of alumina. The sintered platinum redispersed quite fast, taking about 10 minutes of chlorination and 30 minutes of oxidation.
- OSTI ID:
- 215046
- Report Number(s):
- CONF-950801--
- Country of Publication:
- United States
- Language:
- English
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