(66a) Fischer–Tropsch Synthesis Over Rhodium-Promoted Co/SiO2 Catalysts
AIChE Spring Meeting and Global Congress on Process Safety
2010
2010 Spring Meeting & 6th Global Congress on Process Safety
10th Topical Conference on Gas Utilization
Kinetics, Design and Modeling of Fischer-Tropsch Catalysts and Reactions I
Tuesday, March 23, 2010 - 8:30am to 8:55am
Supported cobalt catalysts have been extensively studied for Fischer-Tropsch synthesis (FTS) because of their high activity and selectivity for linear hydrocarbons. The promoting effects of the addition of a second metal to supported cobalt catalysts have been reported in numerous studies. Ru, Re, Pt, and Pd are among the most studied promoters; on the other hand, there have been very limited studies of Rh-Co bimetallic systems. In this work, we report the promoting effect of Rh on silica-supported cobalt catalysts, as well as the results on Ag-Co and Au-Co bimetallic catalysts. Both Au and Rh showed a promoting effect on the FT activity, whereas the addition of Ag decreased the activity. The addition of a small amount of Rh (0.1?0.5 wt%) increased the CO conversion by 50%, while the selectivity was not affected. The deactivated Rh-Co catalysts can be completely regenerated by reduction or by oxidation/reduction treatments. The promoting effect of Rh on Co/SiO2 was studied by XRD, TEM-EDS and TPR/TPO.
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