Continuous Addition Kinetic Elucidation
Date
2022-09-07
Authors
Kraft, Denaisha
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Abstract
To identify the order in a catalyst, multiple reactions are usually performed with various catalyst loadings and concentrations. These are time-consuming and difficult to replicate under identical conditions, and particularly challenging in the cases of catalysts that are prone to degradation or poisoning. Continuous Addition Kinetic Elucidation (CAKE) is a method in which catalyst is continuously injected into a reaction while reaction progress is monitored. The resulting plot of the reaction has a shape that is only dependent on the order in reactant(s) and catalyst(s), which provides a powerful tool for determining kinetic information without reproducibility concerns. The plot is independent of the rate constant, the reactant concentration, or the rate of catalyst injection. To test CAKE, oxygen evolution from KI-catalyzed hydrogen peroxide decomposition was studied. In a single reaction, CAKE provides a simple, reliable, and effective method to elucidate kinetic information such as the catalyst and reactant orders, the rate constant, and the amount of catalyst poisoning.
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Keywords
Catalysis, Catalyst poisoning, Kinetics, Catalyst, Reaction rate, Rate constant