Abstract
A study of the kinetics of methyl linolenate catalytic hydrogenation in liquid phase with a Ni catalyst at 398–443 K and 370–645 kPa, focusing on the proper modelling of the shunt reactions in the network—simultaneous cohydrogenation of double bonds—is presented. A reliable estimation of the corresponding kinetic parameters using pseudo first order rate expressions is made, based on the strategy of analysing subsystems with increasing degress of complexity. The study demonstrates that the linear, consecutive sequence of irreversible hydrogenations from tri-unsaturated to linear methyl esters does not provide a correct description of the kinetic process. Bulk and surface shunt reactions contribute significantly to the net hydrogenation of tri- and di-unsaturates.
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