Abstract
Rh-catalysed Fischer-Tropsch synthesis at high pressures exhibits reversible electrochemical promotion by potassium. At 473 K and 14 bar, 43 products were detected, comprising alkanes, alkenes and primary alcohols. Potassium increased selectivity towards alkenes and primary alcohols as a result of actual increases in the rates of formation of these products - an apparently unprecedented observation. Alkane formation was progressively suppressed by added alkali. These findings are discussed in terms of K-induced acceleration and retardation of possible rate limiting steps for alkene and alkane formation, respectively. Plausible mechanisms are discussed.
Original language | English |
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Journal | Catalysis Letters |
Volume | 103 |
Issue number | 1-2 |
Pages (from-to) | 137-141 |
Number of pages | 5 |
ISSN | 1011-372X |
DOIs | |
Publication status | Published - 2005 |
Externally published | Yes |