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Continuous addition kinetic elucidation: catalyst and reactant order, rate constant, and poisoning from a single
Peter J H Williams1, Charles Killeen1, Ian C Chagunda1
1Department of Chemistry, University of Victoria PO Box 1700 STN CSC Victoria BC V8W 2Y2 Canada mcindoe@uvic.ca +1 250 721-7166.
Chemical Science
|September 22, 2023
Summary
Continuous addition kinetic elucidation (CAKE) simplifies determining reaction orders and rate constants. This method allows catalyst and reactant orders to be found from a single experiment, improving catalytic reaction understanding.
Area of Science:
- Chemical kinetics
- Reaction mechanism elucidation
- Catalysis research
Background:
- Kinetic analysis is crucial for understanding catalytic reactions but is often experimentally challenging.
- Traditional methods for determining catalyst order require multiple time-consuming experiments with potential inconsistencies.
Purpose of the Study:
- To introduce Continuous Addition Kinetic Elucidation (CAKE) as a streamlined method for kinetic analysis.
- To enable determination of reaction orders and rate constants from a single experiment.
Main Methods:
- CAKE involves continuous catalyst injection into a reaction while monitoring progress.
- Analysis of the reactant concentration versus time plot reveals reaction orders.
- Fitting experimental data using provided tools determines kinetic parameters.
Main Results:
- CAKE allows determination of reactant order (m), catalyst order (n), rate constant, and catalyst inhibition from one experiment.
- The shape of the concentration-time plot is uniquely determined by m and n.
- Obtained kinetic data demonstrated good agreement with existing literature values.
Conclusions:
- CAKE offers a more efficient and reliable approach to kinetic analysis of catalytic reactions.
- This method simplifies mechanistic studies and facilitates the development of new catalysts.
- The technique is accessible via open-source code and a web tool.
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