Abstract
The hydrogenation rates of unsaturated soyabean oil have been measured in a falling-film reactor under fast reaction conditions. The rates were measured in the presence of an oil-soluble Ziegler—Natta catalyst. When the hydrogenation time is long, the reaction regime may change at the oil surface from nth to nth, mth order with respect to hydrogen and the unsaturated oil, respectively. This is due to depletion of the unsaturated oil at the interface. The experimental conditions for such a situation have been established. These conditions are to be avoided when determining reaction rate data. The concentration profile of unsaturated oil near the interface in the liquid phase has been calculated in order to interpret the experimental results. To this end, the basic equations were solved numerically by a finite-difference technique.
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