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Promoter Effects on Iron-Based, SBA-15 Supported Ultra-High Temperature Fischer- Tropsch Catalysts
Başlık:
Promoter Effects on Iron-Based, SBA-15 Supported Ultra-High Temperature Fischer- Tropsch Catalysts
Yazar:
Weber, David P., author.
ISBN:
9780355988765
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (53 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Babu Joseph; John Kuhn Committee members: Venkat Bhethanabotla.
Özet:
Promoter effects on SBA-15 supported iron Fischer-Tropsch catalysts were investigated for their potential to improve high temperature catalyst performance. FTS catalysts promoted by manganese (0.15%--1.4%), copper (0.15%--1%), and potassium (0.5%--3%), with all percentages stated on the basis of mass percentage of final catalysts, were prepared and tested at 430°C and ambient pressure in a fixed bed reactor. Manganese showed the ability to promote the FT reaction, increasing both the CO conversion and the average chain length of hydrocarbon products. Compared to the unpromoted catalyst composed only of iron supported on SBA-15, 1.4%Mn (mass) promotion of 15% (mass) iron on SBA-15 improved CO conversion from 29% to 32%, increased alpha from 0.21 to 0.34, decreased carbon dioxide selectivity from 76% to 50%, increased C2-C4 selectivity from 9.6% to 30% and increased C5+ selectivity from 0.21% to 2.2%. Copper promotion gave increased conversion, but did not significantly affect alpha or carbon dioxide selectivity. Potassium promotion in the range of 0.5% to 3% by mass, on the other hand, had a negative effect on CO conversion at all concentrations tested.
Notlar:
School code: 0206
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
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