366
BERENBLYUM et al.
atoms already at a hydrogen pressure of 2 atm, and if and Z(H2O)(St), respectively, whereas the selectivity
they are active in decarbonylation as in the case of palꢀ for these two reaction routes on the copper catalyst
ladium, a further increase in hydrogen pressure does slightly depends on hydrogen pressure and water conꢀ
not lead to an increase in the reaction rate. The third centration. These features can turn to be quite useful
cause can be a low rate of the formation of oleic acid in designing catalysts and processes for the manufacꢀ
and a low strength of its adsorption complex with the ture of higher olefins from renewable feedstock (trigꢀ
catalytic site. These values are quite high in the case of lycerides and fatty acids).
palladium [13].
Water as a decarbonylation product also affects in
different manners the copper and palladium catalysts.
ACKNOWLEDGMENTS
This work was supported by the Ministry of Educaꢀ
tion and Science of the Russian Federation, project
no. 14.B37.21.1658. Resources of supercomputer
complex at Moscow State University were used. The
authors thank T.A. Podoplelova for assistance in
experimentation.
In the former case, water poisons the catalyst, presumꢀ
ably, because of competition between H2O and St for
the active site (admixture of water at a hydrogen presꢀ
sure of 2 atm decreases the conversion from 22 to
11%). The selectivity for total C17 hydrocarbons also
decreases from ~46 to ~23%, probably, as a result of
lowering the copper catalyst activity in St deoxygenꢀ
ation and the increased contribution of the formation
reaction of the corresponding ketone from two St molꢀ
ecules [13].
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Translated by S. Lebedev
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Z
PETROLEUM CHEMISTRY Vol. 53
No. 6
2013