Fischer-Tropsch

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Presentation transcript:

Catalytic Alkane Metathesis by Tandem Alkane Dehydrogenation– Olefin Metathesis

Fischer-Tropsch http://en.wikipedia.org/wiki/Fischer-Tropsch_synthesis

Alkane Metathesis

Tandem Alkane Dehydrogenation– Olefin Metathesis

Molecular Redistribution Mechanism by Olefin Intermediates 24.7% 15.9% Burnett, R. L., Hughes, T. R. J. Catal. 1973, 31, 55

Dehydrogenation catalysts

Schrock-type Metathesis Catalyst Schrock, R. R. et. al. J. Am. Chem. Soc. 1990, 112, 3875

Representative Examples of the Metathesis of n-hexane

The Mechanism of Metathesis and Dehydrogenation Goldman, A. S. et. al. J. Am. Chem. Soc. 1999, 121, 4087

The Reason of Decomposition

The Metathesis by Ir-based Catalysts and Re2O7/Al2O3

Conclusions The decomposition of the olefin metathesis catalysts appears to limit conversions. The author also expect that more active dehydrogenation catalysts will give more turnovers before decomposition of the metathesis catalyst.